By altering currents, altering landscapes, and altering proximity to the equator

a) an ice age is a time where lots of things freeze over and glaciers form

b) they inferred that glaciers had left marks on boulders and melted to form lakes so lots of ice was needed

a) an ice age is a time where lots of things freeze over and glaciers form

a) an interglacial period is a period of warmer, above average temperatures between glacial periods

b) 50,000-100,000 years

c) We are currently in an interglacial period because the Earth is warming up

d) Earth has spent more time in mild interglacial periods during the past 40000 years which has allowed for such plant and animal evolution from multicellular organisms

a) an interglacial period is a period of warmer, above average temperatures between glacial periods

Dumping chemicals into lakes, car exhaust fumes from combustion, and a growing population that requires more industry and food to be created

The airborne ash can block sunlight creating shade and a cooling effect

If pockets of warm air are brought to regions that typically receive cold air, the local climate may warm up, having an effect on the weather and potentially the animals and plants that evolved to be suited for the original climate

a) volcanic activity only changes local climates in the shorter term and do not last forever

b) plate tectonics can change climate, but would not create an ice age since they would not drastically reduce the temperature

c) Reductions in sun energy output would be counteracted by the Earth’s greenhouse effect and less energy would be radiated

a) volcanic activity only changes local climates in the shorter term and do not last forever

Changes in the angle of Earth’s axis occur on the long term that scientists think are responsible for the long cycles