How long does it take for light from a star that is 8 light years away to reach Earth?
A) 8 earth minutes
B) 16 earth minutes
C) 8 earth years
D) 16 earth years
Answer: C) 8 earth years
Answer:
Its A
Explanation:
It takes about 4 years for light from this star to reach earth. Depends on the the Distance of the star. As our sun is 149.6 million km away from the Earth it takes total 8 minutes 20 seconds.
It takes light 8 minute to reach from surface of sun to earth.
However, light produced in the core of the sun takes thousands to millions of years to get to the surface.
A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km).
The number of living organisms of a certain kind in a particular area is called a
factor
ecosystem
habitat
population
Answer:
It is called population
Explanation:
Hope this helped and I got this right on my test, hope you get it right as well
Complete a online search and write at least two sentences to explain the relationship between the two organisms (Humans and the domestic dog). Example : how do they benefit or get harmed by each other?
some technology have a number negative effects which is a negative out come of the technology of vertical farming
Answer:
make me brainliest pls hope it helps :)
Explanation:
Electricity 24hrs.
Initial high cost
High loss when natural disasters occur
24 hrs - Water supply (rotation in the system)
No special selling market
Virus or Bacteria disturb to all plants when enter-
High computerization
Different fertilizers (Mineral fertilizers only
So many problems or negative point in Vertical farming but farmers takes benefit- its positive point)
Answer:
You are learning it vertically, but you may not understand it in person. I hope this helps! Please don't delete my answer, I am only trying to help. =(
Hydrotropism and _______ work together and are difficult to separate from one another.
gravitropism
thigmotropism
phototropism
nastic movements
Answer:
Hydrotropism and gravitropism work together and are difficult to separate from one another.
A meteor moves into Earth's atmosphere at a speed of 35.00 km/s. It is slowed by friction with Earth's atmosphere by 0.02 km/s before it reaches Earth's surface. What is the final speed of the meteor?
Answer: 34.98
Explanation: So basically the meteor was falling at 35.00 km/s and slowed down by 0.02. 35 - 0.02 = 34.98. Period.
The final speed of the meteor 34.98 because it is slowed down due to friction of earth atmosphere which is act opposite direction in compare to meteor movement, So the net velocity of meteor becomes 35.00-0.02 which is equal to 34.98 km/sec.
What is motion map?Motion maps are define as one-dimensional plots built off of a position line.
All motion map contain a position line and dots which denote the objects position at a particular time interval. Motion maps should also have vector arrows to indicate an object speed and direction which is known as velocity.
Motion maps can be a though of as a strove photographs which has many images on one picture. There is set time interval between each image. The value of time step can be different for different motion maps.
Kinetic energy is a form of energy it possess when any object or person is in motion . It can be defined as the work needed to be done to produce a motion in a object from rest position.
If we want to acceleration in an object then we must apply a force on a object to give motion so we can say that we required to do work for acceleration and then we can say that required is equal to kinetic energy.
Therefore, the final speed of the meteor 34.98.
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Which of the following may cause a fault?
O pulling forces
O folding land
O earthquakes
Opushing forces
Please help with the following questions, 50 points AND Brainliest if ALL are correct.
1) Exhaust from motor vehicles is the number one cause of what?
A. carbon monoxide pollution
B. acid rain
C. mercury poisoning
D. sulfur dioxide pollution
2) Choose all the answers that apply.
Carbon dioxide:
A. is a waste product of photosynthesis
B. is a waste product of respiration
C. is the most abundant gas in the atmosphere
D. is the leading cause of the greenhouse effect
E. is released when fossil fuels are burned
3) Choose all the answers that apply.
The greenhouse effect is:
A. slowly increasing sea levels
B. caused when atmospheric gases trap heat
C. slowly increasing global temperature
D. melting the polar ice caps
E. increasing because of carbon dioxide emissions
4) Electrical power plants are the main contributor of what?
A. mercury poisoning
B. sulfur dioxide pollution
C. oxygen pollution
D. pollution
5) Which of the following is the best way to slow the greenhouse effect?
A. drive more often
B. stop using electricity
C. increase the amount of oxygen released by plants
D. use energy sources other than fossil fuels
6) Which part of the water cycle is happening when it is raining in Seattle, Washington?
A. precipitation
B. condensation
C. evaporation
D. respiration
7) Choose all the answers that apply.
Water on earth:
A. is slowly decreasing in amount
B. can be used to generate electricity
C. is not considered a true natural resource
D. is recycled
E. is slowly increasing in amount
8) It is important to pick up waste from your pet because _____.
A. mercury in waste can cause mercury poisoning in fish
B. bacteria in waste can infect aquatic organisms
C. bacteria in waste decreases the amount of oxygen in water
D. nutrients in waste can increase the algae population
9) Choose all the answers that apply.
Which of the following is a source of watershed pollution?
A. pesticide
B. trash
C. chemical spills
D. animal waste
E. fertilizer
10) Which of the following statements is true?
A. Groundwater is not part of the water cycle.
B. Most of the earth's water is freshwater.
C. Thermal pollution is the main disadvantage of hydroelectric power.
D. Refining oil pollutes the air with nitrogen dioxide.
11) Choose all the answers that apply.
Which of the following are renewable resources?
A. oil
B. water
C. wood
D. coal
12) Which of the following statements is true?
A. Paper can be recycled, but plastic and metal cannot.
B. Individuals cannot protect the environment, only the government can.
C. Walking short distances instead of driving can help reduce the greenhouse effect.
D. Contour plowing increases the rate of soil erosion.
Thank you so much
1. D
2. C and D
3. B and E
4. B
5. D
6. A
7. D and B
8. D
9. A and C
10. A
11. A and D
12. C and D
Can i please have brainliest this took like 10 minutes of thinking
A number written before a compound or element that shows how many individual compounds are involved in a reaction. is it a Coefficient or a subscrpt
Answer:
Coefficient
Explanation:
Coefficients show how many individual compounds are involved in a reaction whilst subscripts show how many elements comprise a single compound. Hope this helps.
(Help plsss.) Daniel reads about the survival and reproductive strategies of animals. He is surprised at the complexity of behaviors different kinds of animals practice. He is especially interested in the musk ox.
Migratory behaviors are another reproductive strategy practiced by the musk ox. Migration is the regular, seasonal journey from one place to another and then back again.
For what reasons do animals migrate? Choose the three that apply.
A. to find a better climate
B. to protect the offspring of the group
C. to find more food
D. to gather for mating
E. to increase their population
According to the sedimentary rock layers shown below, which statement is true?
A.
Fossil B is younger than A, but older than C.
B.
Fossil C is younger than D, but older than B.
C.
Fossil A is oldest.
D.
Fossil D is youngest.
Which of the following will NOT result in the expression of the dominant trait? Two dominant factors (alleles) One dominant and one recessive factor (allele) Two recessive factors (alleles) All of these result in the expression of the dominant trait
Answer: C. Two recessive alleles
Explanation: i took the test
Two recessive factors (alleles) will not result in the expression of the dominant trait. So, the correct option is C.
What is Dominant trait?Dominant refers to the inheritance of qualities that are often carried vertically from parent to kid, when both the parent and the child are impacted by the trait or disorder linked to that gene.
One copy of an allele, which might come from just one parent, is called a dominant allele and results in a dominant phenotype in individuals. Having two copies of a recessive allele, one from each parent, is necessary for a recessive phenotype to develop.
A dominant trait is indeed an inherent characteristic that manifests in a child if it is passed down from one parent to another through a dominant allele. Traits, commonly referred to as phenotypes, can include characteristics like eye colour, hair colour, immunity or susceptibility to specific diseases, as well as physical characteristics like freckles and dimples on the face.
Therefore, the correct option is C.
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Your question is incomplete, most probably the complete question is:
Which of the following will NOT result in the expression of the dominant trait?
Two dominant factors (alleles) One dominant and one recessive factor (allele) Two recessive factors (alleles) All of these result in the expression of the dominant trait(help please.) Daniel reads about the survival and reproductive strategies of animals. He is surprised at the complexity of behaviors different kinds of animals practice. He is especially interested in the musk ox.
A group of musk oxen protects their young by forming a circle around them. The adult oxen stand with their heads outward to face an enemy. The young remain protected within the circle.
Choose the correct words to finish the sentence.
This is an example of a (migratory behavior, fertilization strategy, cooperative behavior, or herd instinct?) in which the musk oxen help protect the (habitat, offspring, food, or mates?) of the other group members.
Answer:
1(This would become herd instinct
2(The musk oxen protect their pack when they have a distinctive defensive behavior:
Explanation:
4. Compare and contrast the biotic and abiotic factors found in the South African plain and marine ecosystems.
Answer:
Compare and contrast the biotic and abiotic factors found in the South African plain and marine ecosystems.
Explanation:
Answer:
The biotic factors include all the living organisms in the ecosystem, while the abiotic factors include the non-living factors. In a marine ecosystem, some of the biotic factors are algae, fungi, microorganisms (such as bacteria), plants, animals, and corals. Biotic factors include all the living components present in an ecosystem
Abiotic factors refer to all the non-living, i.e. physical conditions and chemical factors that influence an ecosystem. Examples. Examples of biotic resources include all flora and fauna. Examples of abiotic factors include sunlight, water, air, humidity, pH, temperature
Explanation:
1) Find the mean for his data set of days that had a temperature above 40 degrees C.
2) Find the median for his data set of days that had a temperature above 40 degrees C.
3) Find the mode for his data set of days that had a temperature above 40 degrees C.
4) If, instead, there are 5 more days per month that had a temperature above 40 degrees C, what will be the mean for the data?
5) If, instead, there are 2 more days per month that had a temperature above 40 degrees C, what will be the mode for the data?
6) If the number of days per month that had a temperature above 40 degrees C, doubles each month in that year, what will be the median for the data?
7) For what value of x will 9, 16 and x have the same mean (average) as that of 26 and 12?
8) For what value of x will 55 and x have the mean (average) as 67?
9) The mean (average) weight of three boys is 40 pounds. One of the boys weighs 50 pounds. The other two boys have the same weight. Find weight of each of the boys?
10) A cat consumes 2 cups of milk every day. How much milk does that cat drink on an average in a week?
11) What is mode for above question?
Answer:
1. 11.75
2. 11.5
3. 11 and 14
4. 16.75
5. 13 and 16
6. 23
7. 32
8. 79
9. 35
10. 14
11. 2
Explanation:
Answer:
1. 11.75
2. 11
3. 11 and 14
4. 16.75
5. 13 and 16
6. ?
7. 32
8. 79
9. 50
10. 14
11. 2
Explanation:
Which is the BEST example of learned behavior?
Josie took a sip of water from her canteen because she was thirsty.
Cynndi made a fruit salad using her grandmother’s recipe.
Marcus leapt up to grab the kitten before the bicycle could hit it.
The baby koala made its way to its mother’s pouch without any help.
Answer:
B) Cynndi made a fruit salad using her grandmother’s recipe.
Explanation:
Cynndi made a fruit salad by following her grandmother's recipe. This is the best example of a learned practice. Behavior is something you pick up as you go through life. Cynndi picked up a new habit by watching her grandmother make a fruit salad. Cynndi's behavior makes sense when you think about how she learned to make fruit salad.
Marcus saving the kitten and the baby koala going to its mother's pouch are habits that come naturally, but Cynndi making a fruit salad from her grandmother's recipe is something she learned. So for Cynndi, the best thing she's learned is how to make a fruit salad with her grandmother's recipe.
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What are the positive and negative effects of using the GMOs on potatoes?
Suppose a disease wipes out most of the mountain Lion population in the food web shown
If mountain lions were to disappear from a food web, their prey populations could potentially increase, which could then lead to changes in the populations of the prey's food sources.
For example, if mountain lions primarily preyed on deer, a decrease in the mountain lion population could lead to an increase in deer populations, which could then result in overgrazing of vegetation in the area. This could then impact other species that rely on that vegetation, such as small mammals and birds.
Overall, the loss of a key species like the mountain lion can have significant impacts on the food web and ecosystem as a whole. It is important to understand and mitigate these impacts in order to promote the long-term health and sustainability of the ecosystem.
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Starting with the sand, Mara adds water to the jar one tablespoon at a time. Water soaks the sample from the bottom up. She counts the number of tablespoons of water it takes to bring the water level up to the top of the sample. She repeats this process for the gravel and soil samples.
3 jars: one with sand and water, one with gravel and water, one with soil and water
Mara adds 4 tablespoons of water to the sand, 7 tablespoons to the gravel, and 5 tablespoons to the soil.
Calculate the porosity of each of Mara's samples using this formula, and record the results in the chart.
% porosity = (amount of water added to sample ÷ total sample volume) × 100
“Total sample volume” is the amount of soil, sand, or gravel. A half cup is equal to 8 tablespoons.
Answer: 50, 87.5, 62.5
Explanation:
4/8=0.5x100=50
7/8=0.875x100=87.5
5/8=0.625x100=62.5
The porosity of each of Mara's samples using this formula, and record the results in the chart are 50, 87.5 and 62.5
What is porosity?Porosity is defined as a measurement of the vacant spaces in a material; ranges from 0 to 1, or as a percentage from 0% to 100%, depending on how much of the substance's volume is made up of voids. The volumetric fraction of pores in a material is known as porosity. These pores may be found in the internal or external structure of the object.
The formula used to calculate porosity is
% porosity = (amount of water added to sample ÷ total sample volume) × 100
4/8 = 0.5 x 100
= 50
7/8 = 0.875 x 100
= 87.5
5/8 = 0.625 x 100
= 62.5
Thus, the porosity of each of Mara's samples using this formula, and record the results in the chart are 50, 87.5 and 62.5.
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Using the drop down, complete the first column of the Punnett Square.
(its the same for the t one )
Answer:
tt
Explanation:
The answer would be TT,TT,Tt and Tt. Based on the genotype of the parents, a Punnett square is a figure that is used to forecast the likelihood of inheriting specific traits or genetic features. The approach was created in the early 20th century by an English geneticist by the name of Reginald Punnett, thus its name.
What is the place for the genotype ?The genotype of the parent organisms is written along the top and left sides of a straightforward square grid that is divided into four equal sections. This is known as a Punnett square. The various genetic combinations of the progeny are represented by the squares on the grid.
You must first ascertain the genotype of the parent organisms in order to utilise a Punnett square. The genotype is a term used to describe an organism's genetic make-up and is made up of two alleles, one from each parent.
The dominant and recessive alleles are denoted by uppercase letters and lowercase letters, respectively, for each allele. The gene for brown eyes, for instance, is dominant and is symbolised by the letter "B," whereas the allele for blue eyes is recessive and is symbolised by the letter "b."
The Punnett square may be used to forecast the likelihood that specific traits will be inherited by the offspring of the parent organisms once the genotype of the parent organisms has been established. Each box in the grid indicates a potential allele combination that the progeny might inherit.
Based on the genotype of the parent, you may examine the Punnett square to ascertain the likelihood that the offspring will acquire a certain trait or genetic feature.
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what is the different types of physical weathering ??
Answer:
Abrasion weathering.
Exfoliation weathering.
Frost wedging.
Salt crystallization.
Thermal expansion.
Biological activity/root wedging.
Explanation:
brainliest please
A major hydroelectric power plant will be constructed along a river near the city of Fairville. To do this, a dam must be constructed in conjunction with the hydroelectric power plant. However, a committee to oversee the environmental impacts insists that the planning of the dam take into consideration the impacts on biodiversity. Which of these proposals would be beneficial to implement to ensure the preservation of biodiversity?
Increase the flow rate of the water so that there is an increase of sediment downstream.
Construction of fish ladders to provide a mechanism for migrating species to move upstream.
Construct an aquaculture farm adjacent to the dam to maximize fish populations.
Relocate wetlands that would be displaced by the construction of the dam.
Answer:
Relocate wetlands that would be displaced by the construction of the dam.
Explanation:
Increase the flow rate of the water so that there is an increase of sediment downstream.
1 Describe how urine is formed, beginning with the blood.
2 Describe how the kidney and bladder work together to remove waste from the body.
Answer:
blood pressure pushes water and solutes from the capillaries into the capsule through a filtration membrane
Explanation:
i know it all
Answer:
I thought it was the liquid you dring plus the human waste coming together to make urine
Explanation:
Which animal responded to an internal cue?
The baby koala began to drink its mothers milk.
Cynndi made herself a bowl of fruit salad.
The dog went to its water bowl for a drink.
All of the above.
(Help plsss.) Daniel reads about the survival and reproductive strategies of animals. He is surprised at the complexity of behaviors different kinds of animals practice. He is especially interested in the musk ox.
Migratory behaviors are another reproductive strategy practiced by the musk ox. Migration is the regular, seasonal journey from one place to another and then back again.
For what reasons do animals migrate? Choose the three that apply.
A. to find a better climate
B. to protect the offspring of the group
C. to find more food
D. to gather for mating
E. to increase their population
Answer:
I would say A, C, and D
Explanation:
Im not totally sure so please wait till someone else answers too to double check.
Have a good day/night!!!
(help pls. read the question and view the picture below.) Carolina saw a picture showing fish in a group, and as she looked at the image, she realized what was occurring as she’d recently learned about it in class. Look at the image. Choose the correct words to finish the sentence.
the choices for the first "choose" are "internal fertilization," "survivorship," "courting behavior," and "external fertilization"
the choices for the second "choose" is "have a few that survive," "develop outside the female's body," "all grow to adulthood," and "develop inside the female's body"
Answer: external fertilization, develop inside the female's body
Explanation:
What is actin? And how does it help in cytokinesis?
Answer:
a key cytoskeletal protein with multiple roles in cellular processes such as polarized growth, cytokinesis, endocytosis, and cell migration.
Explanation:
hope this helps
how has the new potato GMO been used to solve the problem of feeding the changing population?
Answer:
has the new potato GMO been used to solve the problem of feeding the changing population?
Explanation:
Help Please...Needed Quickly
1. Discuss the different types of pollution, including the causes and possible solutions.
2. How did the Industrial Revolution impact society?
3. Discuss alternative energy sources, including the advantages and disadvantages.
4. Discuss the ways hazardous wastes are treated.
5. Name some ways you can use the "3 R's" in your home.
100 Points Given for Answer
answer 1:
Environmental Pollution occurs in different forms; air, water, soil, radioactive, noise, heat/ thermal, and light
Air Pollution
Water Pollution
Soil pollution
Noise pollution
Radioactive pollution
Light pollution
Humans are the main cause of water pollution, which is triggered in many ways: by the dumping of industrial waste; due to temperature rise, that cause the alteration of water by reducing the oxygen in its composition; Or due to deforestation, which causes sediments and bacteria to appear under the soil
Most of this air pollution we cause results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power our vehicles. Carbon dioxide (CO2) is a good indicator of how much fossil fuel is burned and how much of other pollutants are emitted as a result.
Effects:
Nutrient pollution can cause toxic algal blooms in drinking water sources that create toxins that kill fish and other aquatic animals. Direct exposure to this toxic alga causes serious health problems in humans including neurological effects, respiratory problems, stomach and liver illness, and rashes.
answer 2:
The Industrial Revolution brought rapid urbanization or the movement of people to cities. Changes in farming, soaring population growth, and an ever-increasing demand for workers led masses of people to migrate from farms to cities. Almost overnight, small towns around coal or iron mines mushroomed into cities.
anwer 3:
advantages are
1_A Fuel Supply That Never Runs Out
2_Zero Carbon Emissions
3_Cleaner Air and Water
4_A Cheaper Form of Electricity
5_Renewable Energy Creates New Jobs
disadvantages are
1_Higher Capital Costs
2_Electricity Production Can Be Unreliable
3_Energy Storage Is a Challenge
4_It’s Impacted by Environmental Conditions
5_Renewables Still Have a Carbon Footprint
anwer 4:
Hazardous waste can be treated by chemical, thermal, biological, and physical methods. Chemical methods include ion exchange, precipitation, oxidation and reduction, and neutralization. Among thermal methods is high-temperature incineration, which not only can detoxify certain organic wastes but also can destroy them.
answer 5:
You could do this by:
1_Try to stay away from disposable goods. In particular, paper plates, cups, bottles, and plastic utensils.
2_Buy durable and reusable goods. ...
3_Pack your lunch in a reusable box rather than foil or cling film.
4_Buying products with less packaging. ...
5_Buying products in bulk.
I WISH THIS WILL BE HELPFUL, GOOD LUCK :)
How do you think energy from the sun ends up in the crust, tomato sauce, cheese, and meat on a slice of pizza?
Answer: Energy from the sun goes into grass, plants, and crops. Animals eat the grass and crops- The animals go to a butcher or slaughter house for meat and cheese and dairy is made from cows for our meals. Energy from the sun goes into wheat and grains, also fruit and veggies.
Explanation: