A food chain starts with a --------------

• plant

• herbivores

• Dirt

• rocks

A plant is considered a ​ (a)   , because it makes it's own ​ (b)   . ​

• autotroph
• heterotroph
• food
• prey

Plants are eaten by -------

• secondary consumer

• primary producer

• primary consumer

• radiant energy

Why are primary consumers heterotrophs?

(a)  

• They need to feed on other organisms.
• They need to decompose
• They need to make thier own food..

Organize these options into the right categories

Groups:

(a) Plant

,

(b) Grasshopper

,

(c) Frog

,

(d) Snake

• Autotroph

• Heterotroph(s)

• Secondary Consumer

• Tertiary Consumer

• Producer

• Heterotroph

• Heterotrophs

• Primary Consumer

True or False: The arrows are pointing toward the direction of the organism doing the eating.

• True

• False

Identify the trophic level with the highest energy and lowest energy.

If only 10% of energy goes to the next consumer level, where does the rest of the 90% of energy go? (more than one answer)

• it is used as heat

• as undigested food

• goes back to the producers

• goes to the top of the food chain.

If the producers have 10,000 Kcal of energy then the 2nd Trophic level will have ​ (a)   Kcal. The 3rd Trophic level will have ​ (b)   Kcal and the 4th Trophic level will have ​ (c)   Kcal.

• 1000
• 100
• 10
• 10000
• 900
• 80
• 1

What would happen if one of the organisms were taken away from the food chain. Choose all that apply

• They will not have enough energy sources.

• Have an overpopulation of organisms if the predator (eater) is gone.

• The entire ecosystems food chain will be affected.

• Not much harm will happen.