Third Grade Science Review End of Year

A __________ includes all living and non-living things in an environment.

• population

• community

• organism

• ecosystem

Field mice eat corn. Which would most likely happen if the field mouse population grew?

• There would be more corn to feed the field mice.

• There would be less corn due to the mice eating it.

• The habitat would get overpopulated because the mice would eat too much.

What would most likely happen if an ecosystem no longer received sunlight?

• The number of herbivores would increase
• The number of plants would increase
• all organisms would adapt
• All living organisms would eventually die

How does energy enter an ecosystem? 

• sunlight
• soil 
• animals 
• invasive species 

A lion captures and eats other animals. What is he considered?

• prey

• predator

• producer

• healthy

A group of the same type of organisms living in the same place at the same time.

• organism

• population

• community

• ecosystem

An animal that is hunted for food.

• predator
• prey
• consumer
• decomposer

Who is the consumer in this food chain?

• The grass
• The rabbit 
• The rabbit and fox
• The fox

Who is the producer in this food chain?

• The rabbit
• The grass
• The fox
• There is no such thing as a producer

Many cactus plants have very sharp needles and thorns. How does this help them survive in a desert environment?

• Birds do not build their nests in cactus plants because of the needles.
• The needles and thorns allow the cactus plants to lose excess heat.
• Thirsty animals will not eat the cactus plants to get the water they contain. 
• The needles and thorns help the cactus plants spread their seeds.