Amoeba Sisters: Food Chains, Webs, and Ecosystems

The grass is considered an autotroph. What does that means?

• It produces its own food.

• It relies on other organisms for food.

The grasshopper, frog, and snake are considered heterotrophs. What does this means?

• Heterotrophs produce their own food through photosynthesis.
• Heterotrophs are organisms that only eat plants.
• Heterotrophs are organisms that obtain food by consuming other organisms.

According to the video, grass produces its own food and is therefore is considered a ______________

• producer

• consumer

According to the video, the animals must consume their own food for energy and is therefore are considered a ______________

• producer

• consumer

As you move up level on the energy pyramid, only about ______% of energy transfers to the next level

(a)  

• 10%
• 20%
• 50%
• 25%

Based on what you now know about trophic levels, which level contains the most energy?

• Trophic Level 1

• Trophic Level 2

• Trophic Level 3

• Trophic Level 4

If the snake population decreases in size, what will happen to the frog population? (Choose one answer only)

• grass increases

• grasshoppers increase

• frogs increase

• no population changes

If the frog population increases in size, what will happen to the grasshoppers population? (Choose one answer only)

• grasshopper increases

• grasshopper decreases

• grasshopper stays the same

True or False: A food web shows a collection of many different food chains within an ecosystem

• False
• True

When looking a the food web: If the small red birds die out, what two other animals will the snake eat?

(Select TWO answers)

• frog

• grass

• rabbit

• owl