Video Transcript
Which of the following is not an example of the importance of water to life on this planet? (A) The hydrosphere helps to maintain viable temperatures for life. (B) Plants use water to photosynthesize. (C) Water is made of hydrogen and oxygen. (D) The human body is around 60% water. (E) Water provides a habitat for many forms of life.
To answer this question, we need to determine which of the answer choices is not an example of the importance of water to life on Earth. Let’s go through each of the answer choices one at a time. The hydrosphere is the total amount of water on a planet. Water can absorb a lot of energy before its temperature rises. Because of this property, the Earth’s hydrosphere is able to prevent land masses from getting too hot during the day or too cold at night. Water is important for maintaining viable temperatures for life on Earth. Thus, answer choice (A) is not the correct answer to this question.
During photosynthesis, water absorbed by the plants’ roots, carbon dioxide from the atmosphere, and sunlight are used to make sugar in the leaves. Without water, photosynthesis could not occur and the plants would not be able to grow. So, answer choice (B) is an example of the importance of water to life on this planet.
Water is made of hydrogen and oxygen, as stated in answer choice (C). However, the composition of a water molecule itself is not an example of its importance. Therefore, answer choice (C) is likely the answer to the question. But just to be sure, let’s consider the last two answer choices.
The human body is made up of around 60% water. Water in our bodies helps us to maintain a stable body temperature, digest our food, and absorb nutrients. So, answer choice (D) is an example of the importance of water to life. Water also provides a habitat for a huge array of different forms of life. So, answer choice (E) is not the correct answer either.
Therefore, the answer choice that is not an example of the importance of water to life on this planet is answer choice (C): water is made of hydrogen and oxygen.
