Knowing that a model is considered a representation of something, the correct option is option B, in which the apple represents the Earth. An apple is sectioned into quarters to represent the ratio of water to land on Earth.

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To answer this question, you can think about a model as a representation of something.

A scientific model can represent an object, a system, a process, a phenomenon, etcetera.

Models are used to explain, predict, or describe natural events. They constitute a significant tool in modern science and are essential to scientific practice.

Knowing this, among the provided options, the one that is a model is option B.

The apple is representing the ratio of water to land on Earth. It is a representation of the earth.

All the other options are experiments performed to see what is going to be the result.

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You can learn more about models at

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5 0

2 years ago

Use your model to explain how one of these metamorphic rocks: gneiss, marble, or quartzite could become igneous or sedimentary r

Oksanka [162]

Answer:

Explanation:

6 0

2 years ago

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Drag the numbers on the left to complete the sentence on the right. Numbers may be used once, more than once, or not at all.

ziro4ka [17]

Answer:

For every molecule of O2 that is released by photosystem II, 2 H2O molecules are needed, which together pass 4 electrons to the PS II reaction-center complex.

Explanation:

Photosystem II can be described as a protein complex through which oxygen is released using water. Light energy is used in this process hence termed as light dependent reactions. This reaction happens in the thylakoid regions. As a molecule of water contains 2 hydrogen atoms, hence a molecule of H2O will release two electrons. two molecules of H2O will release 4 electrons. The break down of water also results in the release of oxygen.

5 0

3 years ago