Answer: The feedback loop involving Arctic snow and ice cover, albedo, and temperature is a positive feedback loop.
Explanation:
Arctic snow and ice cover reflect a significant amount of sunlight back into space, which helps keep the Arctic region cool. This reflective ability is known as albedo. However, as global temperatures increase due to greenhouse gas emissions, Arctic ice and snow begin to melt, reducing the amount of reflective surface and causing more sunlight to be absorbed by the darker ocean water and land, which further amplifies warming. This reduction in albedo leads to an increase in temperature, which in turn leads to more melting of snow and ice, creating a self-reinforcing cycle.
As the Arctic continues to warm, this feedback loop becomes even more pronounced, leading to even more melting and reduced albedo, which leads to even more warming. This process can have significant consequences for global climate, as the Arctic plays an important role in regulating global climate patterns.
Overall, the Arctic snow and ice cover, albedo, and temperature feedback loop is a positive feedback loop, amplifying the initial warming effect caused by greenhouse gas emissions and contributing to further climate change.
Why we need to use the archetorien principle in lab report
This principle is important in laboratory reports because it can be used to determine an object's or material's density, which is an important physical property used in many applications.
The Archimedes' principle is a fundamental physics principle that states that the buoyant force acting on an object submerged in a fluid equals the weight of the fluid displaced by the object. It is critical to use the Archimedes' principle in a lab report to accurately and precisely determine the density of the object or material being studied. This principle provides a dependable and accurate method for calculating density, which is useful in many scientific and engineering fields. By including the Archimedes' principle in a lab report, you show that you considered all relevant factors and used appropriate methods to determine the physical properties of the materials being studied.
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Which is not a general adaptation?
A. Camouflage.
B. Legs for walking.
C. Wings for flying.
D. Streamlined shape to reduce friction.
Camouflage is not a general adaptation which is therefore denoted as option A.
What is an Adaptation?This is referred to as any heritable trait that helps an organism, such as a plant or animal, survive and reproduce in its environment.
It is also called cryptic coloration, is a defense or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings. Organisms use camouflage to mask their location, identity, and movement and it used by most prey to avoid predators, and for predators to sneak up on prey.
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A 25. 00 mL sample of an aqueous solution of Ba(OH)2 requires 18. 45 mL of 0. 01500 M HCl (aq) for its neutralization. What is the molarity of the Ba(OH)2?
The molarity of the 25 mL Ba(OH)₂ solution required to neutralize 18.45 mL 0.01500 M HCl solution is 0.005535 M.
The balanced chemical equation for the reaction between Ba(OH)2 and HCl is:
Ba(OH)2 + 2HCl -> BaCl2 + 2H2O
The moles of HCl used can be calculated as:
moles of HCl = concentration of HCl x volume of HCl
moles of HCl = 0.01500 M x 0.01845 L
moles of HCl = 0.00027675 mol
Since the stoichiometry of the reaction is 1:2 between Ba(OH)2 and HCl, the moles of Ba(OH)2 can be calculated as:
moles of Ba(OH)2 = 0.00027675 mol / 2
moles of Ba(OH)2 = 0.000138375 mol
The molarity of Ba(OH)2 can be calculated as:
molarity of Ba(OH)2 = moles of Ba(OH)2 / volume of Ba(OH)2
molarity of Ba(OH)2 = 0.000138375 mol / 0.02500 L
molarity of Ba(OH)2 = 0.005535 M
Therefore, the molarity of Ba(OH)2 is 0.005535 M.
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Another student points out that Jasmine’s calculation relates only to the water. The student wonders if it is possible to determine the amount of energy in the sample of Cheetos.
Explain why you can answer part (A), even though the calculation in Question 4 related only to the water. In your explanation, refer to evidence from the experiment and appropriate chemical laws.
In Question 4, Jasmine calculated the amount of energy absorbed by the water when the burning Cheeto was placed in it. Although the calculation related only to the water, we can still determine the amount of energy released by the burning Cheeto. This is because of the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transferred or transformed from one form to another. In this case, the energy released by the burning Cheeto is transferred to the water, causing its temperature to increase.
Therefore, we can use the amount of energy absorbed by the water (calculated in Question 4) as a measure of the amount of energy released by the burning Cheeto. We can assume that the energy released by the Cheeto is equal to the energy absorbed by the water. This is known as the principle of calorimetry, which states that the heat lost by the object being studied is equal to the heat gained by the surrounding medium.
However, it is important to note that this assumption is only valid if all the energy released by the Cheeto is transferred to the water. In reality, some energy may be lost to the surroundings, such as through radiation or conduction. Therefore, the calculated value for the energy released by the Cheeto may be slightly lower than the actual value.
You have a ballon filled with carbon dioxide gas at STP. The balloon’s volume is 2.8L, How many molecules are in it?
Answer:
Refer to pic..........
How many mol of CaSO3 were left after the water was driven off? To answer this, What is the molar mass of 1 mol of CaSO3?
Multiply the molar mass of 1 mol times the mass 7.00g to get mol.
There are 5 mol of CaSO3 were left after the water was driven off.
What is molar mass ?The molar mass is the substance; it helps to determine the mass of the sample substance to the atom of the sample or substance. The molar mass depends on the molecular formula and the isotopes of the atom. Molar mass is used for the inducement of electric charge. Molar mass is the measurement of the volume of the mass.
What is moles?
A mole is the atom's elementary particle, an ion. The mole of the substance is always related to the Avogadro number. The mole is always associated with the weight or mass of the element or substance. The standard unit of a mole is mol. The mole is a significant factor of the reactant and products to form an equation. A mole calculates the atom, ion, and substance weighs.
Therefore, are 5 mol of CaSO3 were left after the water was driven off.
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you have 5L of a stock solution of 6M AgNO3, you need a 3M AgNO3 strength solution for a lab assignment. What volume of 3M could you make from the stock solution.
The volume of 3M from making stock solution is 7.5 liters.
To make a 3M solution from a 6M stock solution of AgNO3, we need to add water to the stock solution. Let us assume x liters of 3M solution from 5 liters of the 6M stock solution.
The amount of AgNO3 in the 5 liters of the stock solution is:
5 L * 6 mol/L = 30 mol AgNO3
To make a 3M solution, we need:
3 mol/L * x L = 3x mol AgNO3
We can use the formula:
C1V1 = C2V2
where,
C1 = concentration of the stock solution
C2 = concentration of the final solution
V1 = volume of stock solution
V2 = volume of the final solution
In this case, we know that:
C1 = 6 M
C2 = 3 M
V1 = x
V2 = 5 L + x
In this case, we know that:
C1 = 6 M
C2 = 3 M
V1 = x
V2 = 5 L + x
let us substitute the above values in the formula
6 M * V1 = 3 M * (5 L + x)
Solving for x, we get:
x = 2.5 L
Therefore, to make a 3M solution from a 6M stock solution, a final volume of 5 + 2.5 = 7.5 liters to get a 3M solution.
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A balanced chemical equation allows one to determine the
A) mechanism involved in the reaction.
B) electron configuration of all the elements in the reaction.
C) energy released in the reaction.
D) mole ratio of any 2 substances in the reaction
The correct option is D) mole ratio of any 2 substances in the reaction.
A balanced chemical equation describes the identities and quantities of the reactants and products involved in a chemical reaction. It specifies the number of molecules or moles of each substance required and produced in the reaction.
The coefficients can determine the mole ratio of any two substances involved in the reaction in a balanced equation. This information is critical for predicting how much product can be obtained from a given amount of reactant or determining the limiting reactant in a reaction.
Knowing the mole ratio also allows for precise stoichiometric calculations, which can be used in various chemical applications such as synthesis, chemical analysis, and industrial processes.
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Identify the substance that each property describes. Only acid only base both acid and base
The substance that each property describes are - feels slippery - only base; tastes sour - only acid; conducts electricity - both acid and base
The three properties listed are common characteristics of acids and bases, but they can be used to identify which substance is an acid, which is a base, or which substance has both acidic and basic properties.
Feels slippery: This is a property of bases. When a substance feels slippery, it means that it is producing hydroxide ions (OH-) in water, which react with the skin to create a slippery sensation. So, a substance that feels slippery is a base.
Tastes sour: This is a property of acids. When a substance tastes sour, it means that it is producing hydrogen ions (H+) in water, which react with taste buds to create a sour taste. So, a substance that tastes sour is an acid.
Conducts electricity: Both acids and bases can conduct electricity, but it depends on whether they are in aqueous solution or molten form. In an aqueous solution, both acids and bases dissociate into ions and can conduct electricity. However, in the molten state, only bases can conduct electricity. Therefore, if a substance can conduct electricity in an aqueous solution or molten state, it can be either an acid or a base or both.
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Correct form of question would be
Identify the substance that each property describes.
only acid
only base
both acid and base
feels slippery
tastes sour
conducts electricity
If you want to measure the rate of a reaction you can measure how fast one of the __________ is formed. What one word completes this sentence?
Answer:
products.
Explanation:
Which of the following is false?
The orbits defined in the Bohr model of an atom for atoms in the first and second period. But, beyond those atoms, the model no longer is appropriate.
The dual nature of an electron prevents simultaneously knowing both the exact location and the velocity of the electron.
The Schrödinger equations take into account the dual nature of an electron to define regions in space where electrons have a high probability of being located.
The more precisely the location of an electron is known, the less precisely the velocity is known.
Answer:
B is the false one
hope it helps u u u BRAINLIST
Estimate the volume of a piece of molecular cloud that has the same amount of water as your body. Estimate the volume of a piece of molecular cloud that has the same amount of water as your body. Vcloud= 1. 6×1029 cm3 vcloud= 1. 6×1031 cm3 vcloud= 1. 6×1033 cm3 vcloud= 1. 6×1035 cm3
The volume of a piece of molecular cloud that has the same amount of water as your body is [tex]1.6 * 10^31 cm^3.[/tex]
It is said that the water molecules in our body are a part of molecular cloud and its mass density = [tex]3.5*10^{-21} g/cm^3[/tex]
Let the Mass of Water in Body = Mb
We want to find the volume of a piece of molecular cloud(vcloud) with the same amount of water as the body.
We know that the mass of any object is equal to the product of its volume and density.
Therefore, Mb = vcloud x ρcloud
Given that Mb is equal to the mass of water in a person's body (which can be estimated at between 40-70 kg).
It is given that only one millionth of the mass of a molecular cloud is in the form of water molecules.
Then vcloud = [tex](40 * 10^3g) * 10^6/(3.5*10^{-21} g/cm^3)[/tex]
vcloud =[tex]1.6 * 10^{31} cm^3[/tex]
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complete question: The water molecules now in your body were once part of a molecular cloud. Only about one millionth of the mass of a molecular cloud is in the form of water molecules, and the mass density of such a cloud is roughly 3.5×10^−21 g/cm3
Estimate the volume of a piece of molecular cloud that has the same amount of water as your body.
a.) vcloud= 1. 6×10^29 cm3
b.) vcloud= 1. 6×10^31 cm3
c.) vcloud= 1. 6×10^33 cm3
d.) vcloud= 1. 6×10^35 cm3
What happens to most embryos with extra chromosomes? Explain your answer.
Answer:
an extra copy of chromosome 21 causes Down syndrome (trisomy 21).Explanation:
Chromosomal abnormalities can also cause miscarriage, disease, or problems in growth or development. - hope this helped <3
If two atoms of oxygen have different numbers of neutrons, which property of the two atoms will be different?
If two atoms of oxygen have different numbers of neutrons then the mass of the two atoms will be different.
What is Mass number?Mass number is the sum of the numbers of protons and neutrons present in the nucleus of an atom.
The mass number is commonly used in distinguishing among the isotopes of an element, all of which have the same atomic number (number of protons) and are represented by the same symbol
Mass number depends on the number of neutrons and protons present in the nucleus and determines how heavy the nucleus is. Therefore, if similar atoms have different number of neutrons then their masses will be different.
Therefore, If two atoms of oxygen have different numbers of neutrons then the mass of the two atoms will be different.
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How many liters of oxygen gas (at STP) are needed to burn 0.277L butane?
Explanation:
Refer to pic..........
Which set of variables when taken together will result in the
highest pressure?
The variables which when taken together will result in the highest pressure are increased temperature and number of moles.
What are variables?Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.
There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change
Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.
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3. Predict the change in electronegativity of the next elements in a row (C, Si), then check those properties. Do they match your predictions?
The elements which come after 'C' and 'Si' are 'Ge' and 'Sn'. The element 'F' is the most electronegative element. Down the group the electronegativity generally decreases.
What is electronegativity?The electronegativity of an atom is defined as the relative tendency or power of the bonded atom in a molecule to attract the shared pair of electrons towards itself.
In general the electronegativity decreases on moving down a group. The increase in the size of atoms and the shielding effect of inner electrons decreases the electronegativity.
Here 'Ge' and 'Sn' comes below 'C' and 'Si'.
Thus the electronegativity of the elements after 'C' and 'Si' decreases.
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Falling oil prices would significantly lower the cost of production for many goods. Producers of
plastic kayaks, for instance, would be able to produce larger quantities of their product given the
decrease in input costs. Which of the following illustrates how consumers respond to the price
incentive brought about by the subsequent increase in supply? (1 point)
O Falling prices lead consumers to purchase fewer kayaks.
O Falling prices lead consumers to purchase more kayaks.
O Rising prices lead consumers to purchase fewer kayaks.
O Rising prices lead consumers to purchase more kayaks.
M
4
18
A consumer is known as a person who purchases the product for his or her own need and uses that product. Here Falling prices lead consumers to purchase more kayaks. The correct option is B.
What is fall in price?The general decrease in the price of products as well as in the economy is defined as the fall in price. The falling prices occur for many reasons including supply and demand factors.
A decrease in demand and an increase in supply will cause a fall in equilibrium price, but the effect on equilibrium quantity cannot be determined.
Thus the correct option is B.
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Does someone know the answer to this?
(This is middle school science)
Radioactive dating measures the ratio of C¹²(normal) and C¹⁴ (radioactive) in fossils to determine the exact age of the specimen. C¹⁴ is unstable and has a half life of 5730 years.
What are the ages of organism?The organism ages the amount of C¹⁴ diminishes but the amount of C¹² remains constant. The ratio of C¹⁴ to C¹² is used to analyze the decay of atomic particles to determine exact age.
Relative dating uses rock layers and index fossils to determine an object's estimated age. Relative dating is a method of dating archaeological structures or discoveries based on how they are temporally or formally compared to others. This is in contrast to absolute dating, where the material itself dates.
Therefore, Relative dating can be done by stratigraphic dating, typology or climatic dating.
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under what condition does calcuim react with water
Calcium Hydroxide is created when calcium combines with water, or Ca2+. Water plus Ca results in Ca(OH)2.
Due to the heat created by the reaction, the calcium begins to float.
What purposes serves calcuim?Although it additionally plays a critical role in haemostasis, assisting in muscular contraction, controlling regular heart rhythms, and maintaining normal neural activities, calcium is a substance that is most frequently linked to strong bones and teeth.
What adverse effects can calcium supplements cause?Little, if any, negative effects are brought on by calcium supplementation. Gas, constipation, and bloating are examples of adverse symptoms that might occasionally happen. The most constipating substance is typically calcium carbonate. Finding a calcium supplement that you tolerate the best may need you to test a few various brands or varieties.
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21 The diagram shows an experiment. A B blue litmus paper D aqueous ammonium chloride What happens to the pieces of litmus paper? + aqueous sodium hydroxide blue litmus paper changes colour changes colour no colour change no colour change SHIRED heat red litmus paper changes colour no colour change changes colour no colour change red litmus paper
Three is no change in the blue litmus but the red litmus change color. This is because the ammonia turns red litmus blue due to ammonia.
What is the reaction of ammonium chloride and sodium hydroxide?When ammonium chloride and sodium hydroxide are mixed, they undergo a neutralization reaction to form ammonium hydroxide and sodium chloride. The chemical equation for this reaction is:
NH4Cl + NaOH → NH4OH + NaCl
In this equation, NH4Cl represents ammonium chloride, NaOH represents sodium hydroxide, NH4OH represents ammonium hydroxide, and NaCl represents sodium chloride.
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Which of the following best explains many physical properties of a material?
The arrangement of its atoms or molecules best explains many physical properties of a material.
What is Metal?
A metal is a type of material that is typically hard, shiny, malleable, ductile, and has good electrical and thermal conductivity. Metals are characterized by their ability to form cations, which are positively charged ions, by losing electrons. They typically have metallic bonds, which are formed when the outermost electrons of metal atoms are delocalized and shared among a lattice of metal ions. This results in metals having a unique set of physical and chemical properties, such as high melting and boiling points, high density, and good strength-to-weight ratios, making them useful for a wide range of applications, including construction, transportation, electronics, and manufacturing.
Many physical properties of a material can be explained by its atomic and molecular structure. The arrangement of atoms and molecules in a material determines its physical properties such as density, melting and boiling points, thermal conductivity, electrical conductivity, and more. For example, a material with a tightly packed atomic arrangement will be denser than a material with a more open arrangement. Similarly, the strength of the bonds between atoms and molecules will determine how much energy is required to melt or boil the material.
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1. Mr. Bryan's pet turtle walks 280 feet at a speed of 4ft/min. How long does his walk take? Do not forget to write the word "minutes" after your calculation.
type answer
2.Adrian's mom drove 3 hours to get to San Antonio at a speed of 65 miles per hour (mph). How far away is San Antonio? Do not forget your units- write the word "miles" at the end of your calculation.
Type answer
Answer: 1. is 70 minutes
2. is 195
Explanation: I took the test and I got a B but for sure it's this
It would take Mr. Bryan's pet turtle 70 minutes to walk 280 feet at a speed of 4 feet per minute.
To calculate the time it takes for Mr. Bryan's pet turtle to walk 280 feet at a speed of 4 feet per minute, we can use the formula:
time = distance / speed
Plugging in the given values, we get:
time = 280 feet / 4 ft/min = 70 minutes
Therefore, it would take Mr. Bryan's pet turtle 70 minutes to walk 280 feet at a speed of 4 feet per minute.
The second one is:
According to the given data:
distance = speed x time
where speed is given as 65 miles per hour (mph) and time is given as 3 hours.
Plugging in these values, we get:
distance = 65 mph x 3 hours = 195 miles
Therefore, San Antonio is 195 miles away from Adrian's mom.
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5. A scientist mixed two samples together: a white
solid that boils at about 800°C and a colorless gas
that boils at about 70°C. He analyzed the results and
found two ending substances. One of the ending
substances boils at 245°C. This ending substance is
made up of the repeating group of atoms shown
above. Which of the diagrams to the left shows the
repeating groups of atoms that make up the
samples the scientist mixed together?
The starting material can be shown by the image in image B
What is a chemical reaction?A chemical reaction is a process that involves the conversion of one or more substances (called reactants) into new substances (called products) through the breaking and forming of chemical bonds. In a chemical reaction, the original chemical properties of the reactants are changed, resulting in the formation of one or more new substances with different properties.
Chemical reactions can involve the combination of two or more substances to form a single product, the decomposition of a single substance into two or more products, or the exchange of atoms or groups of atoms between reactants to form new products.
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Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium
chloride solution, water and carbon dioxide. What is the percent yield of carbon dioxide
if 3. 65 g of the gas is collected when 10. 0 g marble reacts?
The percent yield of carbon dioxide if the 3.65 g of the gas is collected when the 10.0 g marble reacts is react with the HCl is 83 %.
The chemical reaction is as follows :
CaCO₃ (aq) + 2HCl (aq) ----> CaCl₂ (aq) + H₂O (l) + CO₂(g)
The mass of the CaCO₃ = 10 g
The molar mass of the CaCO₃ = 100.09 g/mol
The moles of the CaCO₃ = 10 / 100.09
The moles of the CaCO₃ = 0.0999 mol
The molar ratio of the carbon dioxide and the calcium carbonate = 1 : 1
The moles of the carbon dioxide = 0.0999 mol
The mass of the carbon dioxide = moles × molar mass
The mass of the carbon dioxide = 0.0999 × 44
The mass of the carbon dioxide = 4.40 g
The percent yield = ( actual yield / theoretical yield ) × 100 %
The percent yield = ( 3.65 / 4.40 ) × 100 %
The percent yield = 83 %
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The Frackville Power Plant combusts methane to produce electricity. The plant burns 37,500,000 cubic yards of methane each year. The plant produces 61,626,000 kWh of electricity. Calculate the efficiency of this power plant. (Hint: 1 yd3 = 27 ft3)
The efficiency of this power plant that combusts methane to produce electricity is 4.8%.
Given the area of methane = 37,500,000 cubic yards
The power of electricity = 61,626,000 kWh
It is given that the power plant combusts methane to produce electricity.
We know that the efficiency of power is equal to the electricity generated divided by the energy used for combustion.
1 yard^3 = 27ft^3
37,500,000 cubic yards x 27 = 1,012,500,000 cubic feet
Efficiency = energy output/energy input
Efficiency = (61,626,000 kWh) / 1,012,500,000 cubic feet
Here, BTU is the common unit of energy so,
1,012,500,000 cubic feet of methane = 5,072,500,000,000 Joules where 1 Joule = 0.0009478 BTU
5,072,500,000,000 Joules x 0.0009478 = 4,787,039,500,000 BTU
We know that 1 kWh = 3412 BTU then,
61,626,000 kWh = 61,626,000 * 3412 BTU = 210,343,312,000 BTU
efficiency = 210,343,312,000 BTU / 4,787,039,500,000 BTU = 0.0438%
Efficiency = 4.38%
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In which way is primary succession similar to secondary succession?
Both occur where life already exists.
Both are gradual.
Both occur where no life exists.
Both involve creating soil
Primary succession and secondary succession are similar in that they are both gradual processes and involve the creation of soil.
What is Primary succession and secondary succession?
Primary succession occurs in an area where no soil or living organisms are present, such as on bare rock or after a volcanic eruption. Over time, pioneer species like lichens and mosses establish themselves, eventually leading to the growth of small plants, shrubs, and trees. As these organisms die and decompose, they create soil, which allows for the growth of larger and more complex organisms. This process can take hundreds or even thousands of years.
Secondary succession, on the other hand, occurs in an area where soil and some living organisms are already present, but the community has been disturbed or destroyed, such as after a forest fire, a landslide, or human activity like clear-cutting or farming. The process begins with the growth of fast-growing and weedy species that quickly colonize the area, followed by the establishment of more complex and longer-lived species. Secondary succession is generally faster than primary succession because soil and some organisms are already present.
Primary succession and secondary succession are similar in that they are both gradual processes and involve the creation of soil.
However, they differ in terms of the starting point of the succession. Primary succession begins on bare rock or soil that has never been colonized by living organisms, while secondary succession begins on soil that has previously supported life but has been disturbed, such as after a forest fire or clear-cutting.
Therefore, the statement "Both occur where no life exists" is only true for primary succession, while "Both occur where life already exists" is only true for secondary succession.
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Incorporate various chemistry laws to substantiate your view also indicate what type of instruments scientist use in reference to atoms and what are some new advances that has bettered the environment?
The concept that we are made up of atoms is fascinating and scientifically supported.
Scientists study atoms and molecules with various instruments, and several new advances in chemistry have helped to improve the environment by developing more sustainable and efficient technologies.
The idea that everything in the universe, including living beings like us, is made up of atoms is not only fascinating, but it is also supported by several basic chemistry laws.
According to the law of definite proportions, a given compound always contains the same proportion of elements by mass, regardless of its source or method of preparation. This law implies that the elements that comprise living beings, such as carbon, nitrogen, oxygen, and hydrogen, exist in specific proportions that govern their biological functions and properties.
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the complete question is:
Do you find the concept of being made of atoms disturbing? What is your reasoning? When answering the question, include various chemistry laws to back up your point of view, as well as what type of instruments scientists use to study atoms and what new advances have improved the environment.
SCIENCE QUESTION GRADE 7 PLEASE HELP ME WITH IT ANSWER #8 BUT IF YOU CAN ANSWER ALL OF THEM AT ONCE, ONLY TELL ME WHAT QUESTION YOU DID: THANK YOU VERY MUCH!!!!!!!!!!
The mechanism which is put forward by Darwin for the evolution is called the natural selection. It is also sometimes defined as the ecological selection.
What is natural selection?According to Darwin's theory of natural selection the individuals with adaptive traits, that is the traits which give them some advantage are more likely to survive and reproduce. These individuals then pass the adaptive traits to produce new offspring.
Darwin found two types of tortoise in the Galapagos island. The saddle back tortoises had shells that rise in front like a saddle. This adaptation makes them easier to live in area of low vegetation whereas Dome shaped tortoise lived in abundance of vegetation.
Similarly he noticed difference in the shape and size of beaks. Large billed finches feed on large seeds whereas small billed finches feed on soft seeds.
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How many grams of ice at −15◦C must be
added to 30 grams of water at 45◦C to result
in ONLY liquid water at exactly 0◦C?
1. 17.0 g
2. 13.7 g
3. 15.5 g
4. 19.2 g
5. 21.1 g
Explanation:
Refer to pic...........
.