On Weather Maps, this symbol represents a warm front
What is a line with half circles?
100
The average, year-after-year conditions of temperature and precipitation over a large region.
What is climate?
100
The process by which gases hold heat in the atmosphere.
What is the greenhouse effect?
100
Most air pollution comes from this.
What is burning fossil fuels?
100
A time of the day when your shadow will be long, and why.
What is in the morning or afternoon when the sun is low in the sky?
200
The prevailing westerlies and the jet stream push air masses in this direction across the United States.
What is from west to east?
200
The most recent major Ice Age in North America extended as far south as these states.
What are Indiana, Ohio, and New York?
200
Over the past 200 years, the level of carbon dioxide in the atmosphere has done this.
What is increased steadily?
200
Nearly half of the pollution caused by burning fossil fuels comes from this.
What is motor vehicles?
200
In the summer at the equator at noon, this is where the sun will be found in the sky.
What is directly overhead?
300
A cold air mass that overtakes a slow-moving air warm air mass is called this.
What is a cold front?
300
During an ice age, Earth's sea levels do this.
What is lowers?
300
Increased carbon dioxide causes global warming by..
What is trapping more heat in the atmosphere?
300
Fossil fuels are considered nonrenewable resources because they...
What is take hundreds of millions of years to form?
300
The seasons are caused by this.
What is the tilt of Earth's axis as Earth revolves around the sun.
400
Hurricanes form over these.
What is warm ocean water?
400
The sun's rays are least direct on this part of the Earth.
What are the poles?
400
When more ice melts than freezes, sea levels do this.
What is rise?
400
The result of using fossil fuels more rapidly than they are formed.
What is the reserves will eventually be used up?
400
Summers are caused by this.
What is a combination of longer days and more direct rays from the sun?
500
Cold air is more dense than warm air, which causes this.
What is convection?
500
If an organism today needs certain conditions to live, then a similar organism that lived in the past needed similar conditions. This helps scientists determine this.
What are past climates?
500
True or false: Climate Change and the Greenhouse Effect are the same thing.
What is False.
500
An advantage of using solar energy.
What is it will not run out for billions of years?
500
The ozone layer protects living things on Earth from this.