Question:
What two gases make up most of the Earth's atmosphere?
Answer:
Oxygen and nitrogen
Question:
Food webs show feeding relationships among different types of organisms. Those organisms each have a specific niche. Which of the following best describes a function of decomposers in food webs?
Answer:
to recycle nutrients into soil
Question:
If a species is no longer able to reproduce, it will
Answer:
become extinct
Question:
Heat transfer is part of everyday life. Which of these examples involving heat transfer occurs mainly by conduction?
Answer:

Hot soup warms a metal spoon handle.