Unit 3 Lesson 7 Quiz

________ means providing water to land or crops using pipelines or ditches.

• irrigate

• migrate

• immigrate

• adapt

Which of the following are examples of humans modifying the environment?

• Walking in the woods

• Hiking a mountain

• Building a dam

• Cutting down trees

Lake Mead is a man-made lake that is a reservoir for the Hoover Dam.

• True

• False

Why was the Hoover Dam built?

• To provide irrigation for crops on nearby farms

• To supply water for the communities nearby

• To create a tourist destination

• To use up all the extra concrete

Which of the following could be a positive consequence of cutting down trees?

• Animals lose their habitat

• We lose oxygen

• We get the material we need to make certain products

What is a negative consequence of cutting down trees?

• Animals lose their habitat

• We have MORE oxygen

• We get the materials we need to create products

Which of the following is a positive consequence of building big cities?

• More jobs and homes for people

• More pollution

• More traffic

Which of the following is a negative consequence of building big cities?

• More jobs and homes for people

• More pollution

• More businesses and places to visit

Which of the following is a positive consequence of building a dam?

• People can control the flow of water and send it to the communities and farms that need it

• Wildlife can be harm

• Water gets overused and the river starts to dry up

Which of the following is a negative consequence of building a dam? (Choose all correct answers.)

• People can control the flow of water and send it to the communities and farms that need it

• Wildlife can be harm

• Water gets overused and the river starts to dry up