Exploring Ecosystems and Organism Interactions

A beaver builds a dam in a river, which changes the flow of water and creates a pond. How does this change affect the beaver's habitat?

• The beaver's habitat becomes drier.

• The beaver's habitat now includes a pond with more water.

• The beaver's habitat turns into a desert.

• The beaver's habitat disappears completely.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

A student observes that a crab lives in both the ocean and on the sandy shore during its life. What does this tell us about the crab's niche and habitat?

• The crab's niche and habitat never change.

• The crab's niche and habitat can change at different life stages.

• The crab only lives in the ocean.

• The crab only lives on land.

A tadpole lives in water and eats algae, but as it becomes a frog, it lives on land and eats insects. What does this show about the frog's life cycle?

• Its niche and habitat stay the same.

• Its niche and habitat change as it grows.

• It never eats insects.

• It never leaves the water.

Tags

NGSS.MS-LS1-5

A sea turtle lays eggs on a beach, but spends most of its life in the ocean. Which statement best describes the sea turtle's habitat?

• The sea turtle only lives on the beach.

• The sea turtle's habitat changes during its life cycle.

• The sea turtle never leaves the ocean.

• The sea turtle only lives in rivers.

A scientist wants to study how a butterfly's food source changes as it grows from a caterpillar to an adult. What is the dependent variable in this experiment?

• The type of butterfly

• The food source at each stage

• The color of the butterfly

• The number of butterflies

Tags

NGSS.MS-LS2-1

A student observes a group of animals and sorts them into groups based on whether they have fur, scales, or feathers. What is the student doing?

• Guessing what the animals eat

• Classifying the animals

• Drawing the animals

• Naming the animals

Tags

NGSS.MS-LS4-2

Which characteristic would best help you classify a dolphin as a mammal and not a fish?

• It lives in water.

• It has lungs and breathes air.

• It has fins.

• It swims fast.

A student is given a list of animals: blue crab, sea star, and oyster. Which feature could be used to classify them as ocean animals?

• They all have fur.

• They all live in saltwater.

• They all fly.

• They all eat grass.

A teacher asks students to classify animals found in Virginia: black bear, white-tailed deer, and red fox. Which characteristic would be most useful for classification?

• Their favorite color

• Their type of body covering

• The number of legs they have

• The sound they make

A scientist wants to test if the number of legs helps classify animals as insects or spiders. What is the independent variable in this experiment?

• The number of legs

• The color of the animals

• The size of the animals

• The habitat of the animals