Life Science Review

In a food chain of owls, snakes, mice, seeds, the snake population decreased. This area had very little rain that year. Why would the snake population decrease?

• Little water to drink, so snakes perished.

• Snakes ate fewer seeds and berries.

• Snakes ate diseased mice.

• There were fewer mice to eat because the grass died.

Seaweed, fish, seagull.

Which is a producer?

• clam

• seagull

• seaweed

• fish

What is the most important factor in a food chain?

• sun

• grass

• grasshopper

• bird

Grass, grasshopper, bird, snake.

What will happen if many birds died from poison?

• The snake will eat grass.

• The snake will have less to eat.

• The grasshoppers will decrease.

• The snakes will increase.

corn, grasshopper, frog, owl

How does the frog get its energy in this food chain?

• The frog eats the corn.

• The grasshopper eats the frog.

• The frog eats the owl

• The frog eats the grasshopper.

Which event is most likely to cause the number of animals living in a savanna to increase?

• drought

• increased rain

• forest fire

• tornado

egg, larva, pupa, adult

Is this the correct life cycle of a butterfly?

• Yes

• No

You take a plant from the desert and keep it in your room. You water it and fertilize it, but the plant dies anyway. Why did this happen?

• The plant needed more sunlight.

• The plant needed a different temperature.

• You gave it too much water.

• All of the above.

One weed plant will grow lots of seeds. Growing a lot of seeds will...

• scare away animals

• make sure some weeds grow from their seeds.

• forces seeds to fall off

• make seeds travel

How does a penguin's webbed feet help it to survive?

• Helps it grab fish

• move easily in water

• keeps him warm