WorksheetsFlow of Energy
Total questions: 10
Worksheet time: 10mins
For many years, farmers used a chemical called DDT to kill insects in their crops. Gradually, the chemical made its way into streams, rivers, and lakes. After DDT had been used for several years, bald eagles began laying eggs with very thin shells and became endangered. Which is most likely a reason why this happened to bald eagles?
The water they drank had minerals in it.
The fish they ate had pesticides in them.
There was not enough food for them to eat.
There was not enough water for them to drink.
How would the woodpecker population in a forest area most likely be affected if a housing development is built in that area?
They would produce more offspring.
They would change the color of their feathers.
They would experience a decrease in available food.
They would experience a decrease in competition.
A simple food chain includes hawks, lizards, and insects. Which will most likely happen to the lizard and hawk populations if a pesticide is sprayed to kill the insects, and the lizard and hawk populations cannot find other food in this ecosystem?
Both the lizard population and the hawk population will increase.
Both the lizard population and the hawk population will decrease.
The lizard population will increase, but the hawk population will decrease.
The lizard population will decrease, but the hawk population will increase.
Which will most likely cause a decrease in predator populations?
an increase in prey populations
a decrease in prey populations
a decrease in decomposers
an increase in producers
Which will most likely happen to the grasshopper population if the grass population decreases?
The grasshopper population will increase because there will be less competition.
The grasshopper population will decrease because there will be less food available.
The grasshopper population will increase because there will be more food available.
The grasshopper population will decrease because there will be an increase in the predator population.
Why is the presence of insects in a rain forest ecosystem important?
Insects store water needed by other animals.
Insects create energy needed by other animals.
Insects help keep plant growth under control by eating leaves.
Insects are a source of food for many organisms living in this ecosystem.
An owl gets its energy from a field mouse it eats. From which food source did the mouse most likely get its energy?
soil
water
sun
grass
Look at the food chain.
Which way does energy flow in the food chain?
from the grass to the Sun
from the owl to the mouse
from the mouse to the grass
from grass to the mouse
Which most influences a forest ecosystem’s ability to support life?
the size of the trees and the temperature
the amount of sunlight and the type of soil
the size of the trees and the type of soil
the number of insects and the temperature
Which consumer in a grassland ecosystem would be considered both predator and prey?
a grasshopper, because it eats grass and is eaten by birds
a rabbit, because it eats snakes and is eaten by deer
a snake, because it eats mice and is eaten by hawks
an earthworm, because it eats dead animals and is eaten by birds
