Input: Answer this question:
The surface of Earth is covered by a relatively thin layer of water called the
Answer: hydrosphere
Input: Answer this question:
Colored alcohol is used in some glass thermometers. When placed in air of different temperatures, the column of alcohol rises or falls in the glass thermometer. Which of the following best explains why the height of the alcohol column changes?
Answer: The alcohol expands more than the glass when heated.
Input: Answer this question:
Which species have been on the Earth for the shortest amount of time?
Answer: Humans
Input: Answer this question:
In a large forest with many animals, there are only a small number of bears. Which of these most likely limits the population of bears in the forest?
Answer:
supply of food