Science Review: Ecosystems Test Friday 1/24
Write the definition to each word.
System- Group of parts that work as a unit.
Stability- Property of a system in balance
Ecosystem- System made up of living things and their environment
Population- Group of the same species living in the same place at the same time
Community- Group of organisms living together and interacting
Habitat- Place that meets an organism’s needs
Niche- Role of an organism in its habitat
Producer- Living thing that can make its own food
Consumer- Living thing that eats other living things
Decomposer- Living thing that breaks down dead plants or animals for food
Climate- Average weather of a place over a long time
Diversity- Variety of plants and animals
Salinity- Amount of salt in something
1. The most basic parts of an ecosystem are living things and non-living
things.
2. Most natural systems have patterns that give them
Stability.
3. Some ecosystems include many living things because the ecosystems have
lots of space, food, and shelter.
4. A population is part of a community.
5. Tropical rain forests and coral reefs are ecosystems that have a large variety
of plants and animals.
6. The three levels of a food chain are producers, consumers, and
decomposers.
7. In a mangrove swamp, the kinds of plants that can live there are limited by
the salt.
Write answer in complete sentences.
8. Deer feed on grass and leaves. What might happen to the stability of an
ecosystem if there are too many deer? The plants might become harder
for the deer to find. Some deer might starve or be forced to leave the
area.
9. In what ways are a mangrove swamp and a coral reef alike?
Both are located in tropical areas near the equator, both are affected by
the salinity of the water, and both are ecosystems dominated by one
type of organism.
10. Is a tree an open system or a closed system? How do you know?
It is an open system because it takes in inputs (water, sunlight,
minerals) and lets out outputs (oxygen, water, leaves, fruit).
Match each part of the ecosystem in Column A with the part of a city in
Column B.
11. Chipmunks store nuts.(B)
A. A police officer patrols the streets.
12.Sun gives plants energy
to grow. (F)
B. A person puts jewelry in a bank vault.
13. Wind scatters seeds. (D)
C. Garbage collectors dispose of trash.
14. Bacteria eat dead animals. (C)
new
D. A moving company moves a family to a
15. Water in a river is cleaned
as it washes over stones. (E)
city.
E. A sewage treatment plant cleans water for
reuse by farmers.
16. A bear protects its territory
from intruders. (A)
F. A power company provides electricity to a
a town.