Ecosystem # 2

Which population would most likely increase if the crayfish population decreased?

• hawk
• mink
• fish
• snail

A tulip growing in a pot is placed at the center of a table. Which of these nearby objects will the tulip grow toward? (leaves)

• a sunny window
• an electric heater
• a large bowl of water
• a fan blowing gently

Use the food chain to answer the question that follows. 
What would happen if the frogs were suddenly removed from the food chain?

• The grasshopper population would increase.
• The snake population would begin feeding on grasshoppers.
• The owl population would increase.
• The clover population would be unaffected.

Plant growth is affected by environmental factors such as gravity. If a seed is allowed to sprout and grow while it is turned sideways, which will most likely occur?

• roots will grow downward, stems will grow downward
• roots will grow downward, stems will grow upward
• roots will grow upward, stems will grow downward
• roots will grow upward, stems will grow upward

Which process is considered to be a part of the carbon cycle?

• precipitation
• condensation
• photosynthesis
• metamorphosis