1. 4th 6 Weeks 7th Grade Science 2018
District Test Review
4th 6 Weeks 7th Grade Science
2018

2. Producer is… an organism that produces its own food by photosynthesis
Example: plants

3. Consumer is…
an organism that cannot produce its own food and must eat other organisms for energy
Example: mammals

4. Decomposer is…
organisms that get their energy by breaking down dead organisms and waste
Example: fungi

5. Herbivore is… an organism that only feeds on plants (primary consumer)
Example: rabbits

6. Carnivore ….
an organism that only feeds on the meat of other organisms
Example: lions

7. Omnivore is… an organism that feeds on both plants and animals
Example: pigs

8. A food chain…
is a diagram that shows how food energy moves from one organism to another

9. A food web…
is a combination of intersecting food chains

10. An energy pyramid is…
a graphic that shows how energy is transferred between trophic levels

11. The Sun is…
the source of all energy on Earth

12. Plants Bug Chicken Boy The producer is The primary consumer is the
The secondary consumer is the
The tertiary consumer is the
Bug
Chicken
Boy

13. Arrows on a food chain/food web represent….
energy flow

14. A trophic level is…
the position an organism occupies in a food chain

15. Rule of 10 means…
that 10% of an organism’s energy is transferred up the food chain

16. 1) An autotroph is the same as… 2) A heterotroph is the same as…
1) a producer. They are plants who produce their own food
2) a consumer. They consume other organisms for energy

17. Hawk Snake Plant Rabbit
Put these organisms in the correct order to show the flow of energy in this food chain.
Hawk
Snake
Plant
Rabbit

18. Reactants Products

19. Photosynthesis takes place in the…
chloroplast of the plant cell

20. Chlorophyll is the green pigment in plants that…
absorbs light for photosynthesis

21. condensation
precipitation
evaporation
ground water

22. 1)sunlight
7)combustion
2)photosynthesis
6) respiration
5)respiration
4) Dead organisms and waste
3) Fossil fuels

23. 5) Denitrifying bacteria
6) Atmospheric nitrogen
1) Plants and animals
2) plants
5) Denitrifying bacteria
3) decomposers
4) ammonium