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WorksheetsMatter and Cycles in Ecosystems
Total questions: 15
Worksheet time: 15mins
Matter _____ ecosystems.
Flows out of
Is found only in
Stays in the same parts of
Cycles around
Cars, planes, and factories affect the carbon cycle by:
Heating up their surroundings
Releasing more carbon than ecosystems can absorb
Producing energy
Absorbing carbon from the ecosystems around them
Where does the energy in most ecosystems originate?
Sunlight
Producers
Water
Air
All living things use energy and release gas as a waste product. What cycle explains the curculation of these gases?
Water Cycle
Oxygen-Carbon cycle
Nitrogen cycle
The (a) cycle is a continuous circualtion between the soil, organisms, and the air.
How do animals get nitrogen that is stored in the soil?
They are unable to
Bacteria change the nitrogen into a gas that the animals can breath
Plants absorb the nitrogen from the soil and animals can eat the plants
Animals can eat the soil and absorb the nitrogen through their digestive system
We've learned that plants use sunlight, water, and carbon dioxide to make their own food and release oxygen. How can animals complete the oxygen-carbon cycle?
Animals take in the oxygen, but do not release gas as they use energy
Animals take in carbon dioxide and use it to make food
Animals take in oxygen and release nitrogen as waste
Animals take in oxygen and as they use energy, carbon dioxide is released as waste.
The continuous movement of water between Earth's surface and the air, changing from liquid into gas into liquid
oxygen-carbon cycle
water cycle
nitrogen cycle
tri cycle
The continuous circulation of nitrogen from air to soil to organisms and back to air or soil
water cycle
oxygen-carbon cycle
nitrogen cycle
bi cycle
The continuous exchange of carbon dioxide and oxygen among living things
uni cycle
water cycle
nitrogen cycle
oxygen-carbon cycle
Which of the following best describes the role of decomposers in an ecosystem?
They produce energy from sunlight.
They break down dead organisms and recycle nutrients.
They compete with plants for sunlight.
They store energy in the form of fat.
What is the primary source of energy for the water cycle?
Wind
Sunlight
Ocean currents
Volcanic activity
In the nitrogen cycle, how is nitrogen made available to plants?
Through photosynthesis
By absorption of nitrogen gas from the air
Through nitrogen-fixing bacteria in the soil
By consuming other plants
Which process in the carbon cycle is responsible for removing carbon dioxide from the atmosphere?
Respiration
Photosynthesis
Combustion
Decomposition
What happens to the energy that is not transferred to the next trophic level in an ecosystem?
It is destroyed.
It is stored as fat in animals.
It is lost as heat.
It is converted into water.
