Climate Change

What is climate change?

• The long-term change in the weather conditions.

• The short-term changes in the weather.

• The day to day changes in the state of the atmosphere.

• The short-term changes in the climate.

How do we know that our climate is changing?

• Sea levels have risen by 20 centimetres since 1900.

• Ocean temperatures are getting colder.

• The volume of ice lost from Australia is 134 billion tonnes per year.

• The Earth's average temperature has decreased by approximately 2 degrees celsius over the last 100 years.

Identify a natural cause of climate change

• Volcanic activity

• Factories releasing greenhouse gases

• Earthquakes

• Tree rings

What are warm phases in Earth's history known as?

• Inter-glacial

• Glacial

• Pleistoscene

• Quaternary

What are cold periods in Earth's history known as?

• Glacial

• Inter-glacial

• Pleistoscene

• Quaternary

Which of the following could be used to measure changing temperature over time?

• Ice core samples

• Barometer

• Tiltmeter

• Anemometer

Identify a human cause of climate change?

• Enhanced greenhouse effect

• Orbital changes

• Solar activity (sun spots)

• Volcanic activity

What is the greenhouse effect?

• A human factor that keeps the Earth cold enough for life to exist.

• A natural occurring phenomenon that keeps the Earth warm enough for life to exist.

• A naturally occurring phenomenon that keeps the Sun hot for life to exist.

• When human activity, such as burning fossil fuels, releases harmful gases into the atmosphere increasing the layer of greenhouse gases.

What is the Enhanced Greenhouse Effect?

• A human factor that keeps the Earth cold enough for life to exist.

• A natural occurring phenomenon that keeps the Earth warm enough for life to exist.

• A naturally occurring phenomenon that keeps the Sun hot for life to exist.

• When human activity, such as burning fossil fuels, releases harmful gases into the atmosphere increasing the amount of greenhouse gases.

Identify a greenhouse gas.

• Methane

• Carbon

• Oxygen

• Argon