Ecosystems Test 3

The diagram above shows a marine food web. Changing ocean temperatures have led to a large decrease in the number of horseshoe crabs. Which effect will MOST likely occur next?

• The diamondback turtle and grackle populations will decrease.

• The striped bass and plankton populations will decrease.

• The razor clam population will increase.

• The sanderling population will increase.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Eduardo saw some cats living in an alley. Which of these does a cat need to survive?

• grass to sleep in

• large trees to climb

• predators to chase it

• small animals to eat

Tags

NGSS.MS-LS2-1

When a mother dog gives birth to a litter of puppies, she produces milk. Each newborn puppy competes with its litter mates to get close to their mother. What are the puppies competing for MOST?

• air

• attention

• food

• shelter

Tags

NGSS.MS-LS2-1

Which pair of organisms benefits each other the MOST?

• birds building a nest in a bush

• worms eating the roots of a plant

• squirrels burying seeds from a tree

• deer scraping their antlers on a tree

Tags

NGSS.MS-LS2-2

In what way do bushes benefit from bears eating their berries?

• Their seeds are spread around.

• Other predators are scared away.

• Nearby ground becomes compacted.

• Their stems and branches are broken.

Which illustration below shows living things helping each other?

• 
• 
• 
• 

Tags

NGSS.3-LS2-1

What would MOST likely happen to this food chain if a farmer decides to dust a wheat crop with an insecticide?

• The wheat would become greener.

• Other birds would move into the fields.

• The hawks would start eating the wheat.

• There would be fewer sparrows in the fields.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which part of a pond ecosystem gives small fish shelter?

• rocks

• water

• frogs

• soil

Deer are plants-eaters. A winter storm kills many of the plants deer eat. The storm will MOST likely result in the deer

• shedding a lot of fur.

• traveling in a herd.

• becoming thin.

• feeding on meat.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which is most responsible for recycling dead plants and animals in an ecosystem?

• water

• bacteria

• fish

• insects

Tags

NGSS.MS-LS2-3