1. CLIMATE CHANGE

2. Facts on Climate Change
Which of the following statements are true? a. The Earth's average temperature has increased since the late 1800s, when people started burning a lot of coal, oil, and natural gas. b. Worldwide, 2001–2010 was the warmest decade ever recorded. c. In the United States, seven of the top 10 warmest years on record have occurred since 1990.

3. Facts on Climate Change
They’re all TRUE!!!

4. CLIMATE CHANGE
Climate change is a change in global weather patterns over a long period of time.
Normal part of the Earth’s natural variability.

5. CLIMATE CHANGE
Relates to interactions between the atmosphere, ocean and land.
Studied by climatologists who study and compare past and present climate patterns.

6. Indicators of Climate Change

7. ANALYZING CLIMATE CHANGE
Analyzing data on past climate change can help us better understand our current situation.
Tracking the amount of greenhouse gases in the atmosphere
CO2 traps heat and raises global temps

8. ANALYZING CLIMATE CHANGE

9. STUDYING PAST CLIMATES
How do they study climates from the past?
Ice cores
high levels of CO2 indicate warm climate.
Sea-floor sediment
Concentration of oxygen isotope in shells of microorganisms, high levels indicate cool water

10. STUDYING PAST CLIMATES
Fossils
Animal fossils can show adaptations to climate change
Broad leaves indicate warm climates
Tree rings
Thin rings indicate cool weather and less precipitation