LM5.Science.Unit14.Exam

On a mountain with conifer trees, bears, and mountain goats, some conifer trees are not growing, and bears are not finding berries because mountain goats eat the trees. this weakens and kills the trees, so the bears have less the food.

Which organism living on this mountain is an invasive species?

• A. The conifer tree

• B. The moutain goat

• C. The bear

River Environment

In a river with native trout, insects, and rusty crayfish, the trout are not finding enough food and shelter because rusty crayfish eat the plants and insects that the trout rely on. This weakens and kills the plants and insects, so the trout have less food and places to live.

Which organism in this river environment is an invasive species ?

• A. The native trout

• B. The insects

• C. The rusty crayfish

• A. The removal of minerals from the moutain will cause the number of plants in this area to increase

• B. There will be an increased likelihood of landslides, causing animals to perish or move.

• C. There will be a decreased likelihood of landslides, allowing plants to thrive.

• D. The removal of minerals from the moutain will cause the number of animals in this area to increase.

• A. The soil will increase in nutrients

• B. New animals will move to the forest

• C. Animals living there will move or perish

• D. More animals will reproduce.

• A. It gives us nigt and day on Earth

• B. It keeps other planets from hiting the Earth

• C. It protects the Earth from the cold climate of space

• D. It keeps the Earth in orbit around the Sun

The diagram on the left shows the different layers of Earth's atmosphere.

In which layer of the atmosphere do objects like the International Space Station complete their orbit?

Hint: Earth's atmosphere is thick. Scroll down to see all of the layers.

• A. Mesosphere

• B. Exosphere

• C. Thermosphere

• D. Troposphere

• A. Rocks

• B. Air

• C. Water

• D. Animals

• A. Water

• B. Rocks

• C. Plants

• D. Air

• A. Lakes

• B. Oceans

• C. Rivers

• D. Fish

• A. Birds

• B. Ponds

• C. Soil

• D. Grass