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WorksheetsEcosystems Review
Total questions: 20
Worksheet time: 10mins
Which organism is a producer?
algae
fish
seal
shark
Based on the food web, which animal gets most of its energy from grass?
frog
snake
mouse
rabbit
The grassland biome is known as the breadbasket of the world.
What type of soil is most often found in the grasslands and increases plant production?
clay soil
rocky soil
nutrient-rich soil
nutrient-poor soil
The nitrogen cycle is important to plants because
nitrogen in the water is healthy
plants cannot use nitrogen as it is
plants need ammonia to photosynthesize
most nitrogen comes from rocks in the soil
A lack of rain limits the growth of vegetation in a grassland biome. How will the lack of rain affect the field mice in the biome?
The population of field mice will increase.
The population of mice will decrease.
The population of mice will remain the same.
The population of mice will increase and then decrease.
What is an important abiotic factor in a marine ecosystem?
the depth of the ocean
the amount of plankton
the size of marine animals
the different kinds of algae
The grassland biome receives very little rain.
How will this most likely affect vegetation?
The plants will grow to a greater height.
The plants will have shallow roots.
There will be many trees.
There will be few trees.
How would a lack of water in the area affect the food chain?
The growth of grass will be limited, and the rabbit and fox populations would increase.
The growth of the grass would be limited, and the rabbit and fox populations would decrease.
The growth of the grass would be limited, but there would be no impact on the rabbit and fox populations.
The growth of the grass would be limited, the rabbit population would decrease, and the fox population would increase.
Why are certain types of vegetation more likely to be found near the surface of freshwater biomes?
Sunlight may be unable to reach the lower layers of the water.
The temperature of the water is lower near the surface of the water.
The amount of dissolved oxygen is lower near the surface of the water.
Fish that eat the plants are unable to swim to the lower layers of the water.
When a plant dies, it often decomposes and becomes part of the soil. This process is one step in which cycle?
lunar
water
carbon
energy
Photosynthesis and respiration are both parts of which cycle?
carbon cycle
nitrogen cycle
phosphorus cycle
rock cycle
In a food web, which organisms have the most energy available to them?
consumers
decomposers
omnivores
producers
A food chain is shown below.
sun --> grass --> grasshopper --> snake --> eagle
What would most likely happen if the snake population were removed?
The grass population would decrease.
The eagle population would increase.
The grasshoppers would stop eating the grass.
The grass would no longer produce food through photosynthesis.
What is the primary source of energy for a food web?
the sun
the producers
the consumers
the decomposers
Which best describes the transfer of energy through food webs?
Energy from animals is recycled among herbivores and carnivores.
Energy from plants is transferred from decomposers to consumers.
Energy from animals is recycled from decomposers to consumers and then to producers.
Energy from plants is transferred to consumers, and then from producers and consumers to decomposers.
Which statement best describes how decomposers return nutrients to the soil?
They create solid materials from the gases absorbed by the soil.
They remove the water from organics and transport it to the soil.
They consume organics, then return substances as waste products that enrich the soil.
They chew material into small pieces which can be used by tiny insects that live in the soil.
What substances do plants use, in addition to sunlight, to produce sugar for food?
carbon dioxide and oxygen
carbon dioxide and water
oxygen and water
oxygen and soil
Why are producers important to food webs?
They are the largest organisms in the ecosystem.
They are the smallest organisms in the ecosystem.
They use the sun′s energy to complete photosynthesis and transfer the energy to consumers.
They use the sun′s energy to grow, and block out the sunlight for consumers and decomposers.
Why is the rate of energy transfer within ecosystems low?
Most of the energy is lost as heat.
Most of the energy is lost as water vapor.
The producers use more energy than the consumers.
The orgranisms are able to create energy fast enough.
A food chain is shown below.
apple tree --> caterpillar --> bird --> fox
Which organism transfers energy through the ecosystem as a producer?
fox
bird
caterpillar
apple tree
