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WorksheetsChanges to Ecosystems
Total questions: 10
Worksheet time: 17mins
Name
Class
Date
1.
The process by which plants make their own food is called -
a)
Respiration
b)
Photosynthesis
c)
Digestion
d)
Baking
2.
Which of the following is NOT an ingredient of Photosynthesis?
a)
Carbon Dioxide
b)
Water
c)
Oxygen
d)
Sunlight
3.
Huge areas of the Amazon Rainforest are being cut down. What effect could this have on the carbon-dioxide and oxygen cycle if the removal of so many plants and trees continues?
a)
Carbon dioxide levels increase
b)
Oxygen levels increase
c)
Carbon dioxide levels decrease
d)
Nitrogen levels decrease
4.
Which of the following could increase the amount of oxygen in the air?
a)
Building more houses
b)
Paving more streets
c)
Planting more trees
d)
Burning more oil
5.
Burning fossil fuels adds carbon dioxide to the air. What could be done to reduce the amount of carbon dioxide and increase the amount of oxygen in areas where fossil fuels are burned?
a)
Building houses
b)
Driving cars
c)
Planting trees
d)
Raising cattle
6.
Animals and plants use substances that cycle through the environment. Which substance is needed by plants to survive and is released into the environment by animals?
a)
Oxygen
b)
Sugar
c)
Salt
d)
Carbon Dioxide
7.
There are many large-mouth bass, a type of fish, living in a small lake near Waco, Texas. How would increased fishing in the lake effect the lake ecosystem?
a)
Predators of the bass might starve due to loss of a food source
b)
The population of the bass’ prey would decrease.
c)
The bass would spend more time swimming near the surface
d)
Water level in the lake would decrease as more fishing took place
8.
Some birds have large, sharp claws and beaks. These birds most likely eat –
a)
tall grasses
b)
small animals
c)
pond microorganisms
d)
tiny insects
9.
Which adaptation of a frog most helps it capture insects to eat?
a)
sticky tongue
b)
Croaking sound
c)
Laying eggs
d)
Smooth skin
10.
All of the following would be adaptations that would be an advantage in a hot, dry desert habitat EXCEPT –
a)
being active at night
b)
getting water from plants
c)
hunting other animals
d)
digging burrows underground
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