question: Write a question you would see in a school textbook. OPTIONS:
- coal
- wind
- water
- thermal
answer: Which is a nonrenewable natural resource that is used to make electrical energy?

question: Write a question you would see in a school textbook. OPTIONS:
- ions.
- protons.
- electrons.
- neutrons.
answer: The difference between the atomic number of an element and the element's atomic mass is the number of

question: Write a question you would see in a school textbook. OPTIONS:
- supply of food
- type of tree
- predation by carnivores
- amount of suitable shelter
answer:
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?