Geography: Chapter 35

What are the three key ideas about global warming?

1. Earth's climate is getting warmer. 2. A trend or change over time, is mainly caused by human activity, not nature. 3. It is bad

Which of the following is true about Antarctica?

Air temperatures are rising in some areas. Air temperatures are falling in some areas. Certain species of penguins are increasing.

What can scientists learn from drilling into glaciers in Antarctica?

Antarctica's climate each year

What a theories on global warming?

Earth's climate is getting warmer. It is caused by human activity. It is harmful to people and biomes.

What is a ice shelf?

It is a large floating sheet of ice that is attached to the coast. Ice shelves can extend out to sea for hundreds of miles.

What is a biome?

It is a very large ecosystem such as a desert, forest, wetland, or grassland. Each biome is home to its own community of plants and animals.

What is Antarctica known for?

It is known for being the coldest place on Earth.

What happens to Antarctica's small amount of solar energy?

It is reflected back into space.

Why does Antarctica get so cold?

It is the farthest continent from the equator.

What is global warming?

It is the gradual increase in the temperature of Earth's surface over time. This warming may be the result of natural causes. It may also be caused by human activity.

What is greenhouse effect?

It is the process by which gases in the atmosphere trap heat from the sun and keep it close to Earth's surface. This trapped heat may contribute to global warming.

Why and how do they study ice shelves in Antarctica?

Satellite cameras check to see growth or shrinkage.

What do many scientists believe relates to global warming?

The greenhouse effect.

Why and how do they study temperatures in Antarctica?

They put thermometers across Antarctica. They also study ice cores to determine amount of carbon dioxide over time.

What is the main things researchers do when they come to Antarctica?

They study global warming.

Why and how do they study penguins in Antarctica?

They study penguins by their nest-census number of penguin nesting. Less means getting warmer. Warmer temperatures mean more snow. More snow means nowhere to nest for the Adelie Penguins.

Researchers go to Antarctica to study global warming. Global warming is

a slow increase in Earth's surface temperature.

The levels of greenhouse gases in the atmosphere are rising due mostly to people

burning fossil fuels.

When researches count the number of penguins in a certain location, it is called

census.

Scientists who support the global warming theory believe that

common crop failures could lead to hunger.

Scientists who support the global warming theory use ______ as their evidence.

glacier records, climate records, and greenhouse gas levels

What do ice shelves form when their edges break off?

icebergs

Who will be most affected by rising sea levels?

low and flat countries.

Some scientists who doubt the global warming theory argue that Earth is warming due to

natural causes

Scientists who doubt the global warming theory argue that increasing surface temperatures come from

only cities and urban areas.

Seven countries that claimed Antarctica signed the Antarctic Treaty in 1959. This treaty made it so Antarctica was

reserved for peaceful activities.

Global warming could affect the Adelie penguins because an increase in snowfall would

ruin the bare spots they need for nesting.

Many scientists believe global warming started because of

the Industrial Revolution.

What is the name of the natural process that keeps Earth warm?

the greenhouse effect