Encircle the letter of the correct answer.
1. Which sphere includes all the plants and animals on Earth?
a. asthenosphere
b. biosphere
c. lithosphere
d. stratosphere
2. An ecosystem thrives with biotic and abiotic factors. Which of the
following is an abiotic factor?
a. fox
b. fungus
c. minerals
d. tree
3. Which is a biotic factor?
a. air
b. lion
c. sunlight
d. water
e. sunlight
4.______are organisms that can make their own food.
a. Autotrophs
b. Carnivores
c. Herbivores
d. Heterotrophs
5._______are organisms that feed on other organisms.
a. Autotrophs
b. Carnivores
c. Herbivores
d. Heterotrophs
6._____are organisms that feed only on plants.
a. Autotrophs
b. Carnivores
c. Herbivores
d. Heterotrophs
7.______are organisms that feed only on meat of animals.
a. Carnivores
b. Herbivores
c. Omnivores
d. Scavengers
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