Natural causes of climate change

From which year did mean global temperature start to increase steeply?

• 1950

• 1960

• 1970

• 1980

Sunspots are ____________ areas of the sun.

• cooler

• warmer

When sunspots increase, earth's temperature ______

• increases

• decreases

• remains the same

Sunspots have a _____ year cycle.

• 10

• 11

• 12

• 13

What happens to the areas surrounding the sunspots when sunspot activity increases?

• Temperature of surrounding areas increases

• Temperature of surrounding areas decreases

• No change occurs

Why does temperature of surrounding areas of sunspots increase?

• because heat from sunpots increases the temperature of surrounding areas

• flares from sunspots increases solar radiation affecting surrounding areas

• to compensate for the lower temperatures of sunspots

• All of the above

When volcanic eruption occurs, it _________ temperature on the ground.

• increases

• decreases

In which year did Mount Pinatubo erupt?

• 1990

• 1991

• 1992

• 1993

On which island in the Philippines is Mount Pinatubo?

• Mindanao

• Luzon

• Mindoro

How much did temperature drop after the eruption of Mount Pinatubo?

• 0.4 degrees C

• 0.6 degrees C

• 0.8 degrees C

• 1.0 degrees C