Glencoe Life Science

Chapter 26: Ecosystems

Ecosystems

1
About what percentage of water on Earth's surface contains high concentrations of salt?
A)15%
B)35%
C)95%
D)65%
2
The region below about 200 m in an open ocean is called the __________.
A)canopy
B)dark zone
C)understory
D)steppes
3
Which of these biomes receives the least amount of rainfall every year?
A)desert
B)taiga
C)tropical rain forest
D)temperate deciduous forest
4
Which one of these is true of the tropical rain forest biome?
A)The soil thaws during the summer.
B)The soil contains little dead vegetation.
C)The soil is thin and gravelly.
D)The soil contains permafrost.
5
The gradual changes that happen in the types of species living in a region are called __________.
A)balance
B)permafrost
C)community
D)succession
6
Which of these biomes receives little annual precipitation?
A)temperate deciduous forest
B)tundra
C)taiga
D)grasslands
7
__________ are usually shallow and filled with an abundance of plant and animal life.
A)Lakes
B)Oceans
C)Ponds
D)Rivers
8
Which of the following animals can be found in a wetlands environment?
A)bear
B)salamander
C)lemming
D)beaver
9
When is the intertidal zone covered with water?
A)at low tide
B)at high tide
C)during daylight hours
D)during nighttime hours
10
Which biome typically has four distinct seasons?
A)temperate rain forest
B)temperate deciduous forest
C)tundra
D)desert
11
Which of these aquatic ecosystems has the highest salinity?
A)river
B)estuary
C)stream
D)coral reef
12
Which of these biomes is considered the most biologically diverse?
A)tropical rain forest
B)grasslands
C)temperate deciduous forest
D)desert
13
Because ponds tend to be filled with plant material, these bodies of water are usually high in __________.
A)salinity
B)nutrients
C)acidity
D)permafrost
14
The body of water where a river and an ocean meet is called __________.
A)an estuary
B)a wetlands
C)an understory
D)a pond
15
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 move closer to cities to search for food and water.
B)The animals become more active during daylight hours.
C)The animals stop searching for water.
D)The animals migrate to tropical rain forests.
16
__________ describes the weather patterns that affect a region over a long period of time.
A)Community
B)Climate
C)Succession
D)Weather
17
Taigas and grasslands are examples of __________.
A)biomes
B)succession
C)canopies
D)estuaries
18
In which aquatic ecosystem would you find ocean fish being raised for food for humans?
A)a wetlands
B)an estuary
C)a coral reef
D)an intertidal zone
19
Primary succession begins in an area without __________.
A)wind
B)air
C)soil
D)sunlight
20
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)secondary succession
B)primary succession
C)pioneer species
D)climax communities
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