What is the main source of energy for all ecosystems?

• seaweed
• krill
• sun
• plankton

Most life in the ocean is found in where the ocean floor slopes downward. Which zone is this?

• intertidal
• benthic
• oceanic
• neritic

The two main factors that determine the type of life found in each ocean zone are....

• salinity and acidity
• depth and sunlight
• plant and animal life
• all choices are correct

What are three abiotic factors in a biome?

• Water, fish, and temperature
• Earth, wind, and fire
• worms, birds, and cats
• fish, water, and bowl

A diagrams that shows energy flow through an ecosystem is called.....

• energy pyramid
• food chain
• food web
• all choices are correct

The rainforest is located. . .

• all choices are correct
• near the equator
• near the poles
• between the equator and the pole

The two types of grassland ecosystems on earth are . . .

• savannas and temperate forests regions
• temperate grasslands and tundra regions
• savannas and temperate grassland regions
• alpine tundra and polar tundra regions

The ecosystem where pine trees are located is called. . .

• a temperate forest
• coniferous forest
• rainforest
• all are correct

Which of the following represents a desert ecosystem

• dry climate, animals that are active at night, plants spaced far apart
• dry climate, animals active in the day, broad leafy trees
• cold climate with over 157 inches of rain fall, animals with thick coats
• none are correct

The main difference between a polar tundra and an Alpine tundra includes...

• the amount of rainfall
• the cold temperatures
• the Alpine tundra is found at the top of tall mountains
• permafrost