Chapter 14 Lesson 3

Chapter 14 Lesson 3

Recent Climate Change

Poll

Which best describes Earth's climate?

• Earth's climate is constant and doesn't really change much.

• Earth's climate is unpredictable, and it changes all the time.

• Earth's climate is predictable, and it changes.

Global Climate Change

• Average temperatures on Earth have been increasing.

• Temperatures were steady from 1880-1900.

• Since 1975 temperatures have continued to increase.

Multiple Choice

When Earth's temperature has risen it has always fallen back to or below -0.2 except around

• the 1980s

• the 1900s

• the 1940s

• the 1920s

Multiple Choice

This chart shows that

• Earth's climate is on the rise.

• Earth's temperature is normal.

• Earth's temperature is rising.

• Earth's air is rising.

Global Climate Change

• The northern hemisphere has seen the most warming.

• This rise in global temperatures is called Global Warming.

Multiple Choice

Over the years the greatest warming has been in

• the southern hemisphere

• the western hemisphere

• the northern hemisphere

• the eastern hemisphere

GLOBAL WARMING

The main reason for global warming is us, humans.

Multiple Choice

The rise in Earth's average surface temperature is called

• greenhouse gases

• deforestation

• global climate model

• global warming

Multiple Choice

The largest cause of global warming is

• animals

• the sun

• volcanoes

• humans

GLOBAL WARMING

People increase the amount of greenhouse gases in the atmosphere.

Multiple Choice

People increase the amount of ___ which is playing a part in global warming.

• greenhouse gases

• thunderstorms

• snowstorms

• sporting activities

Greenhouse Gases

Trap heat in the atmosphere to help keep Earth warm.

Multiple Choice

Do natural actions like volcanoes erupting, people breathing, and forest fires created by lightning, cause the amount of greenhouse gases to increase?

• yes

• no

Multiple Choice

Is cutting down 5 trees deforestation?

• yes

• no

Multiple Select

Greenhouse gases increase when people

• burn forests

• drive cars that use gas

• read books

• cut down trees

Multiple Choice

Greenhouse gases increase when people

• drive too fast

• drive too slow

• when people have accidents

• burn fossil fuels

Multiple Choice

By trapping some of the heat leaving the Earth, greenhouse gases help to make sure that

• Earth does not get too hot.

• Earth gets enough rain.

• Earth does not get too cold.

• Earth does not get to much snow.

Multiple Choice

This picture shows that heat is sometimes sent back into outer space and sometimes it is trapped by greenhouse gases. This balance is broken when

• not enough greenhouse gases are in the atmosphere

• too many greenhouse gases are in the atmosphere

• the Earth is too close to the sun

• the moon is too close to the Earth

Multiple Choice

Greenhouse gases absorb heat energy leaving the Earth. Think of the gases as hungry babies that eat heat. Imagine if there were too many babies sitting there eating the heat. What happens when all that heat is trapped in the atmosphere.

• People on Earth will notice it getting hotter.

• Satellites in outer space will be destroyed.

• People on Earth will notice it getting colder.

• The sun will be blocked out.

Aerosols

are the opposite of greenhouse gases because they send heat energy back into space to keep the earth cool.

Multiple Choice

Are too many aerosols(tiny droplets in the atmosphere) bad? Here they are reflecting sunlight back into space.

• No. They will keep the Earth's temperature balanced.

• Yes. They will reflect too much sunlight back into outer space.

Together

The right amount of aerosols and greenhouse gases balance Earth's temperatures by preventing Earth from getting too hot or too cold.

Multiple Choice

Global warming will lead to

• Ice caps(glaciers) that have been around for thousands of years to melt.

• No areas of Earth having snow.

• beaches freezing.

• land shifting.

Multiple Choice

A warmer planet means some areas will get ____ and cause flooding.

• too much heat

• too much wind

• too much rainfall

• too much cold

Multiple Choice

Greenhouse gases and aerosols are

• opposites because one is in the atmosphere and the other is on the ground.

• opposites because greenhouse gases heat the Earth and aerosols cool the Earth.

• the same because they both heat the Earth.

• the same because they both cool the Earth.

Multiple Select

Extreme warming of the Earth can change or take away

• animal life

• human life

• beach fun

• houses to be destroyed

Multiple Choice

Global warming could cause ___ which will lead to food shortages because some crops won't be grown.

• rain

• winter storms

• gas shortages

• drought