Although there are many ___________, there is a ________ toward increasing temperatures and decreasing ice on Earth since about 1880.

When the amount of carbon dioxide or methane __________, energy absorbed by the surface ____________.

*Select ALL that apply.

The mixture of gases surrounding a planet.

Variations in a set of data.

Good evidence shows trends over a long period of time instead of fluctuations within a short period of time

Which two gases (when increased) cause an increase in temperature and energy absorbed and a decrease in ice?

Absorb means to....

What trend are we seeing in Earth's surface ice?

The ability to make things move or change.

A climatologist is creating a simulation for Earth’s climate and is working on how to set it up. One of the options for the simulation is to increase methane in the atmosphere. How should the energy in the Earth system change when the amount of methane in the atmosphere increases?

There should be . . .

Global average temperature increases when __________ absorbed by the surface increases.

Eleanor wants to do an experiment in order to analyze what is in the atmosphere. What do you think she will find?

If less energy entered than exited the Earth's System, what is true about the amount of carbon dioxide or methane in the atmosphere?

The weather conditions in an area in general or over a long period.

If methane decreased, . . .

There are some bacteria that release methane into the atmosphere. Scientists think that if the number of these bacteria decreased, the amount of methane in the atmosphere would decrease. What would happen to energy in the Earth system if methane in the atmosphere decreases?

Dr. Derrick Lampkins Is a climatologist who studies _______ in Greenland using GPS technology.

The chart shows a trend of an overall _____ in global temperatures.

The blue circle shows the _____ of the graph. The red circles show the ____ of the graph.

Energy is always ________ the Earth system as light from the sun. This energy is absorbed by Earth’s surface and warms the air near the surface.

When the energy entering and exiting are ________, global average temperatures will stay the same.

Average temperature keeps its ______ as long as the amount of energy entering the system is equal to the amount of energy exiting the system.

About 56 million years ago, Earth’s temperature rose suddenly. Earth got so warm that water in places that were normally very cold or even frozen, such as places near the Arctic Circle, became warm. This was known as the _______.

During the Eocene Period, landscapes near the _____ looked like swamps in Florida do today. Earth had no ice caps, and the water in the Arctic Ocean was warm enough for a pleasant swim

What could have changed the balance? One theory is that the amount of carbon dioxide gas (CO2) in the atmosphere increased, perhaps because of________

If carbon dioxide _______, the amount of energy coming into the system from the sun wouldn’t have changed, because incoming sunlight passes right through carbon dioxide.

Gases that affect the Earth system , such as carbon dioxide, are called __________.

Normally, water at the bottom of the deep ocean is very cold—close to freezing temperature. However, in the early Eocene, even the deepest water became ________.

Like carbon dioxide, _______stops some outgoing energy from leaving the Earth system.

About 800 million years ago, Earth got much colder. Over time, ice covered most of Earth’s surface—maybe even all of it! This was the _______.

The Cryogenian Period was much _____ than any ordinary ice age.

During the Cryogenien Period even the ________, which today is warm and tropical, experienced freezing temperatures back then. Nothing lived on land at that time—all life was in the ocean,

During the Cryogenien Period ______ lived on land at that time—all life was in the ocean, in liquid water beneath the frozen surface.

During the Cryogenian Period, Earth’s surface was an icy wasteland that scientists have nicknamed “_________.”

A decrease in carbon dioxide and methane can cause ______ energy in the system and lower temperatures

___________, or burning fuel, is the process used to power most of our homes, businesses, and cars. Combustion adds carbon dioxide gas to the atmosphere.

Combustion leads to ______ temperatures on Earth—but not because fires are hot.

The process of burning almost any fuel puts ________ into the atmosphere, whether the fuel is coal, oil, natural gas, or wooden logs.

Cows and other grass-eating animals, like sheep and goats, produce a gas called _____ which also warms the planet when it gets into the atmosphere.

Methane is also produced by industrial sources such as using natural gas to produce ______.

Of the methane put into the atmosphere by human activities, 35% comes from _________.

Because they warm the planet, carbon dioxide and methane are known as __________.

Many people have thought of possible solutions, like capturing carbon dioxide at power plants, reducing the amount of methane animals release into the air, and using more______

What energy source is about 93 million miles away?

Solar power plants convert light energy from _______ into electrical energy.

Unlike solar power plants, most power plants produce electricity by burning______—that is, combustion.

Burning fuel releases ______.

If we can produce electricity using energy from the______ instead of energy from _____, we can stop putting so much carbon dioxide into the atmosphere.

One drawback to solar power is that it's ______.

One way humans can keep carbon dioxide out of the atmosphere is to drive cars _______

Even electric cars tend to increase the amount of carbon dioxide in the atmosphere because they get energy from_______.

People can keep some of that ______ from being released by driving less, no matter what kind of car they have.

How can people stop driving cars so much?

Even though transit vehicles often burn fuel, riding public transit helps reduce the amount of _____ we put into the air

In______, one cow puts out methane in about the same amount as one car puts out carbon dioxide

To reduce the amount of methane cows produce, some scientists are working on inventing ways for cows to produce less gas when they digest their food. One way to do this includes:

Another solution would be to eat less beef: if humans ate less meat that comes from cows, farmers would raise ______, and there would be less methane in the atmosphere.

Phones and light bulbs don't burn any fuel—they run on _______.

Some power plants use complicated processes to capture the carbon dioxide produced by burning fuel and store it _______