Q: How does a human body get energy?
A: Food and oxygen combine to deliver energy.
Q: Which of these are broken down during chemical, but not physical, changes?
A: compounds
Q: A scientist plans to investigate the nervous system of sea slugs. What should the scientist do first?
A: Review the research other scientists have done on sea slugs.
Q: Kim lost her hammer outside. When she found it a few months later, some parts of the metal were covered with flaky, brown rust. Which type of change occurred when rust formed on the hammer?
A:
chemical