6th Grade-Ch. 4.4-4.6

Toxic chemicals are substances that can cause harm to living organisms. Which of the following is an example of a toxic chemical?

• Water

• Carbon dioxide

• Mercury

• Oxygen

An invasive species is:

• A species that is native to a particular region

• A species that is introduced to a new environment and causes harm

• A species that is endangered

• A species that is beneficial to the ecosystem

Which of the following best defines wetlands?

• Areas where water covers the soil, either permanently or seasonally

• Dry land with no water coverage

• Mountainous regions with high elevation

• Deserts with minimal rainfall

How do some invasive species get to the Great Lakes?

• Through ballast water from ships

• By natural migration

• Via air currents

• Through human introduction on land

Which of the following is an example of an invasive species?

• Bald Eagle

• Alewife

• American Bison

• Monarch Butterfly

How would Asian carp impact the Great Lakes?

• They would have no impact.

• They would improve water quality.

• They would disrupt the ecosystem.

• They would increase fish diversity.

Why is habitat loss a concern to the Great Lakes region?

• The natural environment is destroyed.

• It improves water quality.

• It increases fish population.

• It reduces pollution.

What percentage of the earth’s surface is water?

• 50%

• 60%

• 70%

• 80%

How much of the earth’s water is salty?

• About 50%

• About 70%

• About 98%

• About 45%

What is the primary cause of water pollution in the Great Lakes?

• Wind erosion

• Solar radiation

• Natural disasters

• Industrial waste