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.

Afood web shows who eats who in any given habitat. every living thing, from one-celled algae to giant blue whales, needs food to survive. each food web is a possible pathway that energy and matter can follow through the habitat. a food web begins with producers: organisms that convert sunlight into usable chemical energy. the food web is completed by the decomposers who turn organic wastes, such as decaying plants, into inorganic materials, such as nutrient-rich soil. decomposers complete the cycle of life, returning nutrients to the soil or oceans for use by producers. in this food web, identify the decomposer.

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

Essay on sustainable development of soiciety