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WorksheetsScience Unit 7 lesson 3
Total questions: 13
Worksheet time: 39mins
What is the original source of most food energy?
insects
sunlight
heat
ecosystems
What organisms change energy from sunlight to food for other organisms?
consumers
producers
herbivores
carnivores
A pet owner dropped some new fish into a pond. Several species of fish lived in the pond, but within a few months, only members of the new species survived. What BEST explains why this happened?
Too many fish caused an imbalance in the ecosystem, so the food web was affected.
All new species have an advantage in an ecosystem.
The new species was probably bigger than the other fish in the pond.
All of the species were dying out, and the new species was the last to survive.
What is MOST LIKELY to happen if most of a population of animals dies of disease?
The food web will stop.
The decomposers will die.
The food web will change.
The producers will also get the disease.
Which of these things that animals need travel through a food chain?
herbivores
ecosystems
air and sunshine
nutrients and minerals
A hawk and an owl compete for the same food in the same food web. What is the MOST LIKELY reason why they are both able to succeed?
The hawk eats the owl.
The owl changes its diet.
One animal moves to a different habitat.
One hunts at night, and the other hunts during daytime.
A ________ is a model of overlapping food chains in which the flow of energy branches out in many directions.
food chain
food web
A ________ is a model that shows the transfer of energy from one organism to another.
food web
food chain
Food chains begin with _________ from the sun.
energy
producers
consumers
decomposers
In this food chain, grass is a ___________?
producer
consumer
decomposer
In this food chain, the mouse is a _________.
producer
consumer
decomposer
In this food chain, the snake is a ________.
producer
consumer
decomposer
In this food chain, the hawk is a __________.
producer
consumer
decomposer
