1. What is the difference between primary waves (P-waves) and secondary waves (S-waves)? A. Primary waves are elastic waves that travel faster than secondary waves that are compression waves.

B. Primary waves are compression waves that travel faster than secondary wave with elastic rope-like movement.

C. Primary waves are compression waves that travel slower than the secondary wave with elastic rope-like movement.

D. Primary waves are rolling waves and secondary waves cause horizontal shifting, both move along the Earth's surface.

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

Ameadow ecosystem includes many species of grasses and small shrubs, several herbivores, and a few carnivores. a fungus colonizes the meadow and kills most of its vegetation. what is most likely to happen to the populations of herbivores and carnivores in the ecosystem? a. the populations of herbivores and carnivores will increase because there will be less competition for chemical energy. b. the populations of herbivores and carnivores will remain stable because the fungus cannot infect these organisms. c. the populations of herbivores will decrease because of vegetation loss, but the population of carnivores will remain stable. d. the populations of herbivores and carnivores will decline because less chemical energy will be stored in the ecosystem.

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?