What makes elements and compounds different from mixtures? Elements and compounds-

a). have a constant composition
b). are made of gases
c). will not change when heated
d). conduct electric current

Answer:

a). have a constant composition

Explanation:

Let's take water, a compound, as an example. Regardless of how much water you have, there will be one oxygen molecule every two hydrogen molecules. It has a constant composition. The same case is with elements. You'll have a constant amount of atoms per mole. Meanwhile, in mixtures, the composition of everything mixed together is not constant as it is not equal everytime.

Besides, the rest of the choices do not even make sense in the first place...

The speed of chemical weathering depends on: A:Water freezing B: amount of wind C:Soil depth

Right Answer will be marked brainlest​

Organize the parts of this body system in the correct order according to the levels of organization in a multi-cellular organism, simplest to most complex.
The system is Brain, Central nervous system, Human being, Nerve tissue, Neurons.

Complete the following sentence.

_____________ study the features, inhabitants, and land of the earth.

What is the main difference between a dwarf planet and a major planet?
Dwarf planets do not have moons.
Dwarf planets do not have enough mass to be a regular planet.
Dwarf planets are much farther from the sun.
Dwarf planets have not cleared other bodies out of their orbital paths.

What do you think makes an argument stronger? Explain 1- 2 things that would make an argument stronger and more believable?

(This is for science so try to make it science-related.)

I WILL GIVE BRAINLIEST

Given the statements below, choose the one that is true about one-celled living things. Answers

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Under normal conditions, yeast produces spores.

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The adult stage for one-celled organisms is usually extremely long.

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Algae can only be unicellular.

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Because of its size, algae does not make much oxygen for the earth.

Please look at the picture and answer two boxes

What are air masses giving brainliest and 15 points

Which property of minerals is the least reliable for identifying minerals?
hardness
luster
streak
color

Petroleum products, which contain carbon, are burned, and the carbon escapes into the atmosphere, as carbon dioxide, BUT, how does it get into the petroleum in the first place?

Before humans ever ventured into space, we fantasized about visiting—and even living on—other planets. As technology continues to develop, it may one day be possible for humans to call planets other than Earth's home. Space scientists have several possible Earth-like planets and moons insight, but one that is of high interest is Kepler-186f, a planet 500 light-years away. It orbits a star much like the Sun, and it orbits in a habitable zone: it is far enough from the star to allow for the pooling of water (if it is present) on the planet's surface.

Is being in a "habitable zone" enough to say the planet is habitable for human life? What characteristics would an Earth-like planet need to have to support life? What challenges would we face traveling to and colonizing Kepler-186f or other Earth-like planets outside of our solar system? Do you think scientists should spend time looking for Earth-like planets before we have the technology to visit them? Why or why not? PLEASE HELP ME!!! :((

What two molecules transfer their energy to ATP to provide fuel for cells?
a. carbohydrates and lipids
b. enzymes and nucleic acids
c. amino acids and nucleic acids
d. amino acids and lipids

Which two organisms are most closely related?

Indian elephant and hyrax
Asian elephant and Indian elephant
woolly mammoth and Asian elephant
hyrax and woolly mammoth

Explain the differences between saturated and unsaturated lipids and give examples of each.

What role do glucose and oxygen play in cellular respiration?
O They are reactants because they are present before the reaction.
O They are reactants because they are present after the reaction.
O They are products because they are present before the reaction.
O They are products because they are present after the reaction.

write a mini-essay about Balanced & Unbalanced Forces

Explain in a paragraph (4+ sentences) how they are connected in an ecosystem. "They" is referring to the animals below-

Arctic wolf
Musk ox
Grizzly bear
Arctic Hare
Snowy Owl
Arctic Tern
Polar bear
Reindeer
Arctic Fox
Snow bunting
Golden Eagles

Diabetes is a disease caused by the inability of the pancreas to produce insulin as the body needs it. Insulin is a hormone that regulates the breakdown of glucose for energy. People who have this disease, often have to take in additional insulin. E. coli bacteria can be altered to produce synthetic insulin in the laboratory.

A.
The insulin produced by bacteria can be used to help treat people with diabetes.
B.
E. coli bacteria are one of the main causes of the disease, diabetes.
C.
The bacteria can be injected into a person with diabetes and permanently cure him or her.
D.
all of these

PLZZ HELP THIS DUE TODAY AND I STRESS OUT PLZZ HELP ME ONLY GIVE ME THE CORRECT ANSWER PLZZZ this due today !!!!HELPP

1. The space exploration program has hired you for advice on how to keep astronauts healthy in the space shuttle. How can the program's doctors make sure the astronauts’ bodies work well enough to exercise in space?

A. The doctors could make sure that the astronauts’ bodies can make enough energy by getting enough sleep.

B. The doctors could make sure the astronauts’ stomachs are getting the molecules they need from food and air.

C. The doctors could make sure the astronauts’ cells are getting the molecules they need from food and air.

D. The doctors could make sure the astronauts’ cells are getting different types of molecules from food.

2. Some types of syrup are almost entirely made of glucose molecules. If a person ate some syrup like this, what would happen to her ability to exercise?

A. It would be harder for her to exercise because her digestive system would need to use more enzymes to combine the glucose molecules together.

B. It would be easier for her to exercise because glucose moves through the circulatory system faster than other food molecules usually do.

C. Nothing would happen to her ability to exercise, but her respiratory system would not work as hard, since glucose has more energy than oxygen molecules.

D. Nothing would happen to her ability to exercise, but her digestive system would not work as hard, since glucose is already small enough to get to her cells.

3. Doctors tested a patient and found that his cells contained normal levels of oxygen and glucose molecules, and no starch molecules. Will this patient be able to exercise normally?

A. Yes, the glucose and oxygen molecules can react together to release energy for the body to function.

B. No, his digestive system is not breaking down food molecules; his cells need starch molecules to react with glucose, which releases energy.

C. No, his body systems are working, but he needs to eat different food; in cells, only amino acids can react with oxygen to release energy.

D. Yes, as long as his cells have glucose, they don’t need anything else to release energy for the body to function

4. Some problems with the digestive system make it very difficult for the body to digest enough food. Why would it be harder to exercise when you have a digestion problem like this?

A. You would not be able to sleep, which would make you too tired to exercise.

B. Your cells would have molecules from air, but would not get enough molecules from food.

C. You would need to breathe in a lot more air because your body would have fewer molecules from food.

D. You would not get any of the molecules your cells need to exercise.

5. The test report above shows the level of molecules in different parts of the patient’s body. How would you expect this patient to do on an exercise test? (use the image only for this question!!!)

6. Two soccer teams, the Bears and the Panthers, played games at the same time in two different locations. The Bears game was played at sea level, where there is a normal amount of oxygen. Before their game, the players on the Bears ate a lunch of mostly starch. The Panthers game was played at very high altitude, where there is less oxygen. The players on the Panthers ate a lunch of starch and protein. Which team probably did better in their game? *

A. The Bears probably did better because their cells released energy from oxygen reacting with glucose, which was broken down from starch in the digestive system.
B. The Panthers probably did better because their cells released energy from breaking down protein in the digestive system, which then combined with oxygen in cells.
C. The teams did equally well because their digestive systems just need to break down starch into glucose for cells to release energy.

D. The teams did equally well because glucose from starch can react with oxygen or proteins to release energy.

7. A student thinks that the human body only works properly when cells are getting molecules from food and molecules from air. Is the student correct?

A. Yes, the body only works when cells get molecules from food and molecules from air.
B. No, the body only works when cells are getting molecules from different types of food.
C. No, the body only works when the lungs get molecules from air, and the stomach gets molecules from food.

D. No, the body works as long as cells are making all the molecules they need.

8. Stella’s respiratory system is not working well. Why is this a problem for her ability to exercise?

A. Her respiratory system will not be able to break down molecules from air into oxygen.
B. Her cells will not work well when they have low levels of oxygen.

C. Her digestive system will have to work twice as hard to get the same amount of energy from glucose molecules.

D. Her cells will not work because molecules from air will be too large for her body to use.

Based on the structures of each type, which cell do you think can perform more functions: Human cells or bacterial cells?

Which of the following statements is true?

A. Animal cells are able to make their own food.
B. Plants need chlorophyll to make food.
C. Carbon dioxide is a by-product of photosynthesis.
D. Photosynthesis happens in some animal cells.

Why do animal cells not need the same structures vacuoles, cell walls and chloroplas, that plant cells need?

Two processes are described below:

Process A: Rapid moving water strikes a rock on the bottom of a stream and breaks it into pieces
Process B: Glaciers moving along a rocky surface form cracks in the rocks

Which statement is true about the processes?

Both represent physical weathering.
Both represent chemical weathering.
Process A is physical weathering and Process B is chemical weathering.
Process A is chemical weathering and Process B is physical weathering.

how would I write out cm before 1 on a metric ruler
ex : 8'4 cm

Which of the following is not one of the seven characteristics of life?

A, response
B, adaptation
C, reproduction
D, mobility

what is the difference between a balanced force and an unbalanced force

help me this is biology its due today
choose an organism and research its evolutionary history analyze and interpret data in the fossil record to determine similarities and differences between the organism and its fossil ancestors

How are plant and animal cells similar? please help i forgot ;^;

I know it’s a lot but my teacher is not doing so well and it’s hard to learn that way

Study the diagram showing the range of temperature in the Earth’s layers.

Graph of Temperature of Earth apostrophe s Layers, showing start depth at 410 kilometers and start temperature at 1,000 degrees Celsius. As depth increases to 6,370 kilometers, temperature increases to over 6,000 degrees Celsius.

What does the diagram show about Earth’s interior?

The outer core is the hottest region.
The mantle is hotter than the outer core.
The continental crust is the coolest region.
The inner core is cooler than the lithosphere.