Interactions in Ecosystems

A nonliving element in an ecosystem is an 

• animal
• abiotic factor
• biotic factor
• organism

Tags

NGSS.MS-LS2-3

A living or once-living organisms in an ecosystem is a

• population
• biotic factor
• abiotic factor
• community

Which of the following is not a biotic factor?

• mushroom
• air
• elephant
• coyote

Tags

NGSS.MS-LS2-3

Which of the following is not an abiotic factor?

• sun
• temperature
• soil
• grass

Which organism do the owl and the weasel compete for in the food web?

• Hawk
• Spider
• Grasshopper
• Shrew

Tags

NGSS.MS-LS2-4

Which of the following is a herbivore?

• cricket
• frog
• hawk
• shrew

(8.11B) The Couch's spadefoot lives in Texas and his the characteristics listed below.
The Couch's spadefoot is adapted to a certain type of environment. Which of these resources is most likely scarce in this environment?

• Soil
• Sunlight
• Water
• Oxygen

Tags

NGSS.MS-LS2-1

A park is home to a large number of robins, squirrels and rabbits. The robins and squirrels live in the park’s trees. The robins feed on earthworms and insects that live on the ground. The squirrels eat the acorns produced by the park’s oak trees. The rabbits hide in the bushes and feed on the grass. Which factor would negatively impact the number of rabbits living in the park?

• Collecting acorns off the ground.
• Planting more trees.
• Removing park bushes.
• Removing the squirrels.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Highways allow people to travel between towns and cities, but it also divides ecosystems into smaller pieces. Animals can become separated from lakes they use for food and shelter. For example, tiger salamanders use lakes for these reasons. How could the building of highways affect animals such as the tiger salamander?

• Tiger salamanders could improve lake ecosystems.
• Tiger salamanders may be cut off from important resources.
• Tiger salamander habitats may have less pollution.
• Tiger salamander habitats within ecosystems would become larger.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which two organisms in this food web are COMPETING for food with each other?

• Cougar and Deer
• Rabbit and Snake
• Insects and Grass
• Shrew and Mouse

Tags

NGSS.MS-LS2-4