How do lightning and thunder illustrate the relationship between light and sound waves? A Light moves faster than sound, so you hear thunder after you see lightning. B Sound moves faster than light, so you see lightning after you hear thunder. C Lightning and thunder are the same, so light and sound waves move together at the same time. D Sound moves light, so when you hear thunder you know lightning will move toward you.

All of the following are examples of service-learning opportunities except: a. donating time to senior citizen war veterans and writing a report about the experience for your u. s. history class. b. getting a part-time job at a habitat restoration center. c. reading to second-grade students as part of your assigned reading time for your english class. d. planting trees in your community and then discussing global warming in your science class.

The authors use the word “backbone” in lines 3 and 39 to indicate that

In this food web, which group would increase in number if snakes were eliminated? a. producers b. decomposers c. primary consumers d. secondary consumers e. tertiary consumers