Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
|
ice ages
|
times in Earth's history during which glaciers covered large parts of the surface
|
|
|
aerosol
|
solid particles or liquid droplets in the atmosphere
|
|
|
sunspot
|
relatively dark, cool regions on the surface of the sun.
|
|
|
greenhouse effect
|
the trapping of heat near a planet's surface by certain gases in the planet's atmosphere
|
|
|
global warming
|
a gradual increase in the average temperature of the atmosphere, thought to be caused by an increase in greenhouse gases from human activity
|
|
|
fossil fuels
|
coal, oil, or natural gas that forms over millions of years from the remains of ancient organisms; burned to release energy
|
