North Carolina Science Grade 6

Chapter 15: Ecosystems

Ecosystems

1.
__________ are usually shallow and filled with an abundance of plant and animal life.
A)Oceans
B)Lakes
C)Rivers
D)Ponds
2.
The gradual changes that happen in the types of species living in a region are called __________.
A)balance
B)succession
C)community
D)permafrost
3.
In which aquatic ecosystem would you find ocean fish being raised for food for humans?
A)an intertidal zone
B)a coral reef
C)a wetlands
D)an estuary
4.
In many desert regions, water is diverted from streams and rivers to provide it to people in cities. How does this impact the animals in the area?
A)The animals migrate to tropical rain forests.
B)The animals become more active during daylight hours.
C)The animals move closer to cities to search for food and water.
D)The animals stop searching for water.
5.
Primary succession begins in an area without __________.
A)air
B)sunlight
C)soil
D)wind
6.
Which biome would the kangaroos of Australia be found in?
A)tropical rain forest
B)desert
C)grasslands
D)temperate deciduous forest
7.
Which one of these is true of the tropical rain forest biome?
A)The soil contains permafrost.
B)The soil thaws during the summer.
C)The soil is thin and gravelly.
D)The soil contains little dead vegetation.
8.
Which plant is typically found in grasslands?
A)cactus
B)rice
C)corn
D)moss
9.
Which of these biomes receives the least amount of rainfall every year?
A)tropical rain forest
B)taiga
C)desert
D)temperate deciduous forest
10.
Which of the following animals can be found in a wetlands environment?
A)lemming
B)bear
C)salamander
D)beaver
11.
When is the intertidal zone covered with water?
A)at low tide
B)at high tide
C)during nighttime hours
D)during daylight hours
12.
After a house is torn down, the land it stood on begins to have grass and weeds grow from the soil. What is this an example of?
A)climax communities
B)pioneer species
C)primary succession
D)secondary succession
13.
Which of these animals might be found living in a taiga?
A)spotted owl
B)kangaroo rat
C)zebra
D)moose
14.
Because ponds tend to be filled with plant material, these bodies of water are usually high in __________.
A)salinity
B)permafrost
C)nutrients
D)acidity
15.
__________ describes the weather patterns that affect a region over a long period of time.
A)Climate
B)Succession
C)Community
D)Weather
16.
Which biome typically has four distinct seasons?
A)temperate deciduous forest
B)desert
C)temperate rain forest
D)tundra
17.
Which of these biomes is considered the most biologically diverse?
A)tropical rain forest
B)temperate deciduous forest
C)desert
D)grasslands
18.
Which of these aquatic ecosystems has the highest salinity?
A)stream
B)coral reef
C)estuary
D)river
19.
The region below about 200 m in an open ocean is called the __________.
A)steppes
B)dark zone
C)understory
D)canopy
20.
The body of water where a river and an ocean meet is called __________.
A)an understory
B)a wetlands
C)an estuary
D)a pond
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