Purpose of physical change
Answer:
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.
Explanation:
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Why do you want to read research by scientists who used the scientific method?
Answer:
When conducting research, scientists use the scientific method to collect measurable, empirical evidence in an experiment related to a hypothesis (often in the form of an if/then statement), the results aiming to support or contradict a theory.
What is photosynthesis
Answer:
The process by which green plants and some other organisms in the presence of sunlight to synthesize nutrients from carbon dioxide and water is called photosynthesis.
Lipoproteins contain cholesterol and triglycerides.
True
False
Answer:
it is true..they contain cholestrol and triglycerides.
Who was the first person who
suggested that all particles can be
thought of as waves?
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❁Louis de BrogliePlease help fast please ASAP
Answer:
I can't see your questions
The idea that Earth orbits the sun is referred to as ____ of the solar system, because of the scientist who first proposed it.
Answer:
Copernican Heliocentrism
Which category would a glacier fall under ?
Weathering
Erosion
Deposition
Explanation:
erosion, because glacier is considered an agent of erosion
Which of the following is a requirement for a good scientific hypothesis?
Why are some elements such as hydrogen, often found as diatomic molecules?
Answer:
Hydrogen chloride, carbon monoxide, or nitric oxide do all have diatomic molecules. In essence, what that means is that they are all gasses at room temperature. Because their atomic nuclei have its origin in different elements, scientists refer to them as heteronuclear.
Explanation:
What do marine veterinarians wear to work
Answer:
Clean, wrinkle-free, scrubs should be worn by all medical personnel with the occasional exception of veterinarians, who may need to wear business casual or professional business clothing underneath their white coats instead.
Explanation:
What type of organisms have cells that carry out all the process is shown in the picture.
Answer:
Unicellular organisms
define photosynthesis
Answer:Photosynthesis is a process of cooking food by green plants using oxygen, Carbon dioxide, sunlight, water and minerals.
I hope it helped U
stay safe stay happy
Answer:
below
Explanation:
Photosynthesis is the process for which plants create food. Using carbon dioxide, sunlight, and water, it can create a sugar for food and emmit clean oxygen into the air.
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Which one of the following is an adaptive immune defense?
a. Intact skin
b. Fever
c. The inflammatory response
d. Proteins that kill invading microbes
e. Antibody production
Answer:
e. Antibody production
Explanation:
What is the ratio of carbon, hydrogen, and oxygen in lipids?
One hydrogen bond is _, but many hydrogen bonds are_
Answer:
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The hydrogen bond is one of the strongest intermolecular attractions,
A single hydrogen atom can participate in two hydrogen bonds, rather than one. This type of bonding is called "bifurcated" (split in two or "two-forked"). It can exist, for instance, in complex natural or synthetic organic moleculesAnswer:
7
1
We usually get some questions about how many hydrogen bonds these compounds can create, we use it to differentiate between the boiling point of each one of them so it would be great if you could help me.
So what I know that H2O has 4 hydrogen bonds those are 2 from hydrogen atoms and 2 from other molecules that has 2 hydrogen atoms connected to the 2 lone pair of electron that the oxygen has.
In HF, It has 2 hydrogen bonds. The same explanation implies here. In NH3, 2 hydrogen bonds because N doesn't have the required amount of lone pairs to make more hydrogen bonds.
Explanation:
Rocks , soil trees water air and life .How do all the parts affect each other? Give some
examples
Explanation:
Answer:
For the complete encyclopedic entry with media resources, visit: http://www.nationalgeographic.org/encyclopedia/weathering/
Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.
Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away. No rock on Earth is hard enough to resist the forces of weathering and erosion. Together, these processes carved landmarks such as the Grand Canyon, in the U.S. state of Arizona. This massive canyon is 446 kilometers (277 miles) long, as much as 29 kilometers (18 miles) wide, and 1,600 meters (1 mile) deep.
Weathering and erosion constantly change the rocky landscape of Earth. Weathering wears away exposed surfaces over time. The length of exposure often contributes to how vulnerable a rock is to weathering. Rocks, such as lavas, that are quickly buried beneath other rocks are less vulnerable to weathering and erosion than rocks that are exposed to agents such as wind and water.
For example, certain kinds of air pollution increase the rate of weathering. Burning coal, natural gas, and petroleum releases chemicals such as nitrogen oxide and sulfur dioxide into the atmosphere. When these chemicals combine with sunlight and moisture, they change into acids. They then fall back to Earth as acid rain.
Which of the following cells is formed by meiosis?
A) A heart cell
B) A bacterial cell
C) A sperm cell
D) A fertilized egg
Answer:
C ) A sperm cell
Explanation:
These cells are our sex cells – sperm in males, eggs in females. During meiosis one cell divides twice to form four daughter cells. These four daughter cells only have half the number of chromosomes of the parent cell – they are haploid. Meiosis produces our sex cells
Principles of building ecological towers. Advantages and disadvantages of ecological towers
Explanation:
in short answer,
advantages :
- more green more fresh air
- we are lack of rainforest these days, this is one way to taking care of greens by making it.
disadvantages :
- still require environmental damage for building the building itself, toxic waste and so on
- required $$$$ to buy the plants or seed itself
Q3 Your diabetic pregnancy sister is spending the day with you Prepare, cook and serve 2 Lunch for her Prepare a snack dish for her Set the Lunch table.
Do you favour or oppose the use of animal organs (such as hearts or kidneys) as transplants in humans when human organs are not available? Explain.
Lloyd’s lab partner is looking down into a test tube while he heats the contents by using a flame. Which action should Lloyd recommend to his partner if heating must continue?
Wear safety goggles while looking into the opening of the test tube.
Cover the opening of the test tube so that no materials can boil out of it.
Move the test tube so that the opening is pointing away from all students.
Put the test tube in a hot water bath so that no water can enter its opening.
The correct action that Lloyd should recommend to his partner who was looking down into the test tube if heating must continue would be to move the test tube so that the opening is pointing away from all students.
Wearing safety goggles (and looking directly down at the test tube) might not be enough to protect Lloyd's partner nor other students in case the content of the test tube splashes out.Covering the test tube might hinder any generated gas as a result of heating from escaping safely into the air and this might cause an explosion.Putting the test tube in a hot water bath so that water can enter its opening will definitely affect the reaction and prevent them from getting accurate results/observations.Hence, the most correct action would be for Lloyd's partner to move the test tube so that the opening is pointing away from all students.
More on laboratory safety practices here: https://brainly.com/question/4820974
Answer:
Move the test tube so that the opening is pointing away from all students.
Do you think a charger would be a good example for mitochondria?
Answer:
not really because mitochondria break down and convert material into energy. a charger just resembles pulling energy from a bigger source.
Digestion is ________. Group of answer choices Only mechanical Neither mechanical nor chemical Both mechanical and chemical Only chemical
How is a battery like the mitochondria?
Answer:
mitochondria the tiny powerhouses that live inside cells and give them energy, work more like a Tesla battery pack than the kind of battery that you put in a flashlight. These internal cell structures, or organelles, use oxygen to make chemical units of energy for the cell.1
Explanation:
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Are there any chromosomal abnormalities?
Answer:
chromosome number 21
Control variables HELP ME PLEASEEW 9th grade science btw
Using calculations of the numbers of chromosomes in the egg and the sperm, calculate the number of chromosomes that will be present in the mule formed by their fusion
Answer:
46 chromosome
Explanation:
No. Of chromosomes in Egg are : 23
No. Of chromosomes in Sperm are : 23
So when they fusion, give 46 chromosome
Which statement best describes science?
A. Branch of knowledge that studies the natural world to gain knowledge and understanding.
B. Branch of knowledge that studies various societies to gain knowledge and understanding.
C. Branch of knowledge that studies interactions between living things to gain knowledge and understanding.
D. Branch of knowledge that studies pattern, quantity and arrangement to gain knowledge and understanding.
Answer:
branch of knowledge that studies the natural world to gain knowledge and understanding
The statement which best describes science is; Choice A; Branch of knowledge that studies the natural world to gain knowledge and understanding.
What is Science?Science, put simply is the branch of knowledge that studies the natural world to gain knowledge and understanding. This branch of knowledge can be further subdivided into
Physical sciencesBiological sciencesSocial sciences and othersRead more on science;
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Which are predicted to happen in the case of a severe geomagnetic storm? Select the two correct answers. (1 point)
extra currents in the ground will disrupt power grid operations
extra currents in the ground will disrupt power grid operations
signals from radio navigation systems will be disrupted and be inaccurate
signals from radio navigation systems will be disrupted and be inaccurate
satellites will be forced to Earth's surface
satellites will be forced to Earth's surface
high-frequency radio waves used for radio communications will be blocked
Answer: extra currents in the ground will disrupt power grid operations and high-frequency radio waves used for radio communications will be blocked
Explanation:
In the case of a severe geomagnetic storm, extra currents on the ground will disrupt power grid operations and signals from radio navigation systems will be disrupted and be inaccurate.
A geomagnetic storm is caused by a CME (coronal mass ejection) from the sun that smacks against the earth's magnetic field and causes issues such as
Power grid failuresRadio signal disruptionsDamage to critical electronicsEtc.
Extra currents in the ground caused by the geomagnetic storm will disrupt power grid operations. We can also expect a disruption of all radio signals and communications due to changes in the ionosphere during the storm.
Satellites in the Earth's orbit would likely sustain critical damage and may be rendered inoperable, however, since satellites do not use technology to stay in orbit (this is done by the earth's own gravity) they will not fall to the surface, which is why this option is wrong. The final option is also wrong because high-frequency radio waves used for radio communications will be disrupted and unreliable but not blocked.
That is why In the case of a severe geomagnetic storm, power grid operations and signals from radio navigation systems will be disrupted and be inaccurate.
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