Earth 1
What is the smallest source of fresh water on Earth?
surface water
What human activity causes the number of algae growing in streams, rivers, and lakes to increase?
The addition of detergents and fertilizers to runoff entering water sources.
A lumber company cuts down all the trees in an area so it can sell the wood.
What is the removal of all the trees in an area called?
deforestation
What causes smog?
Chemicals released by the burning of fossil fuels by cars, trucks, and buses react with sunlight.
What can acid rain do?
kill trees and other plants
Kevin is making a poster about renewable resources. Which of the following should be included?
water - oil
natural gas - coal
water
A company wants to mine copper in an area. What effects can mining have on the land?
erosion of the soil
pollute water
pollute the land
A satellite that is no longer working continues to orbit Earth. What is the satellite known as?
space junk
How does human activity impact vegetation?
Name one.
Building homes changes where plants grow.
Deforestation can lead to soil erosion.
Air pollutants can cause damaging acidic rain.
What are two practices people are using to protect Earth?
conserving resources and recycling
How does recycling help protect resources?
It reduces the need for new resources to be mined.
What is precipitation?
Precipitation is any liquid or solid water—including rain, snow, sleet, and hail—that falls from atmospheric clouds to the Earth's surface.
Which of the following is an energy source that is continually replaced and will not run out?
1. put solar cells on your home
2. buy busses that run on natural gas
3. replace old gas furnace with a new gas furnace
1. put solar cells on your home
SURPRISE!
496 x 38 = ?
18,848
What effect can growing plants on building tops have in crowded cities?
Name one.
Keeps buildings cooler
reduce smog
reduce water runoff