Topic 5 Lesson 4 Notes

Arctic foxes have white fur during winter because

• the white fur makes the fox harder to see

• the white fur keeps them warm during the winter months

• the white changes colors throughout the seasons

How does a leafless tree protect itself in the cold weather?

• by producing leaves

• by producing its own fruits

• by going dormant

What animals move to another location when the seasons change it is called?

• separating

• migrating

• hibernating

When a bear is sleeping in a hole below the soil covered with snow, it is called?

• migrating

• hiberating

• resting and relaxing

Why do some trees drop their leaves in the fall?

• to use more energy

• to use less energy

• to make new leaves

Why do grasses survive in dry conditions?

• they have water stored in their roots

• they have deep roots

• they are able to produce their own water in their leaves

Living things depend on the ________________________ to give them the things they need to survive.

• oxygen

• environment

• nutrients

Which of these is a slow environmental change?

• watching animals eat

• when a wildfire kills plants

• melting of the glaciers

Which of these is a fast environmental change?

• when a wildlife kills plants

• the melting of glaciers

• when animals eat within their environment

Changes in the environment are caused by

• animals, other organisms, and natural events

• humans, other organisms, and natural events

• hurricanes, tornadoes, and natural events