Florida Science Grade 6

Section 3: Aquatic Ecosystems

Aquatic Ecosystems

1.
Which of these is NOT a freshwater ecosystem?
A)pond
B)reef
C)wetlands
D)river
2.
Because ponds tend to be filled with plant material, these bodies of water are usually high in __________.
A)salinity
B)permafrost
C)acidity
D)nutrients
3.
__________ are usually shallow and filled with an abundance of plant and animal life.
A)Ponds
B)Oceans
C)Rivers
D)Lakes
4.
Which of the following animals can be found in a wetlands environment?
A)bear
B)lemming
C)beaver
D)salamander
5.
About what percentage of water on Earth's surface contains high concentrations of salt?
A)65%
B)35%
C)15%
D)95%
6.
The region below about 200 m in an open ocean is called the __________.
A)canopy
B)understory
C)dark zone
D)steppes
7.
The body of water where a river and an ocean meet is called __________.
A)an estuary
B)a pond
C)a wetlands
D)an understory
8.
When is the intertidal zone covered with water?
A)during nighttime hours
B)at low tide
C)at high tide
D)during daylight hours
9.
In which aquatic ecosystem would you find ocean fish being raised for food for humans?
A)a coral reef
B)an estuary
C)an intertidal zone
D)a wetlands
10.
Which of these factors helps determine the climate of a region?
A)the impact of succession
B)the amount of erosion
C)the amount of precipitation
D)the number of plant species
11.
Which of these aquatic ecosystems has the highest salinity?
A)coral reef
B)river
C)estuary
D)stream
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.