What long-term impact could the destruction of large areas of forests have on Earth?
decreased rates of erosion
increased atmospheric carbon dioxide levels
decreased amounts of acid rain
increased atmospheric oxygen levels
2. Multiple Choice
3 minutes
1 pt
Why is it important to conserve the biodiversity of Earth?
to decrease the amount of global predator populations
to decrease the stability of major global ocean currents
to increase the stability of ecosystems during environmental changes
to increase the amount of nonrenewable resources located in the lithosphere
3. Multiple Choice
3 minutes
1 pt
If the population of a certain predator increases, there is often _______ its prey
a decrease the population of
an increase of the population of
great news for its prey of
no impact found on
4. Multiple Choice
3 minutes
1 pt
Invasive species are:
non-native
harmful to an ecosystem
organisms that can lack predators in the new environment
all of the answers are correct
5. Multiple Choice
3 minutes
1 pt
The number one threat to biodiversity
pollution
fragmentation
habitat destruction
limiting factors
6. Multiple Choice
3 minutes
1 pt
How can people reduce the amount of resources they use?
make more landfills and garbage dumps
buy products with lots of packaging
use water, electricity, and gas conservatively and recycle metal, paper, and glass
Think only about what you need right now and don’t worry about the future
7. Multiple Choice
3 minutes
1 pt
Which is a main cause of soil erosion?
strong winds
flash floods
human activity
fossil fuels
8. Multiple Choice
3 minutes
1 pt
Which organism would have the greatest concentration of pollution?
zooplankton
large fish
fish-eating birds of prey
small fish
9. Multiple Choice
3 minutes
1 pt
Insecticides are sprayed over a large area in an effort to reduce the number of grasshoppers that are eating the corn plants. How will this change affect this food chain?
The number of grasshoppers will increase
The number of lizards will increase
The number of lizards and hawks will decrease
The number of grasshoppers, lizards, and hawks will decrease
10. Multiple Choice
3 minutes
1 pt
All of the following are examples of environmental changes that can be caused by humans except -