Planets
What's for Lunch?
Processes
It's a gas
Climate Change
100

Of the planets of the Solar System this one has the least apparent atmosphere.

What is Mercury?

100

This type of animal only eats other animals.

What is a carnivore?

100

This process is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere.

What is photosynthesis?

100

Plants need this gas in order to survive.

What is carbon dioxide?

100

This is a phenomenon in which heat is trapped close to Earth's surface by particular gases in the atmosphere.

What is the greenhouse effect?

200

This is how long it takes the Earth to complete one orbit around the Sun

What is a year?

200

Whole Grains, lentils, beans, broccoli, berries, and avocados are all good sources of this.

What is fiber?

200

This is the process by which a liquid turns into a solid.

What is freezing (solidifying)?

200

Animals need this gas in order to survive.

What is oxygen?

200

These absorb infrared radiation and thereby cause the earth's average temperature to rise. Carbon dioxide, methane, and chlorofluorocarbons are examples.

What are greenhouse gases? 

300

This is the point in the orbit of a planet or a comet at which it is farthest from the sun.

What is an aphelion?

300

Nuts, seeds, dried fruit, legumes (beans, lentils and chickpeas, dark leafy green vegetables, and tofu are all good sources of this.

What is iron?

300

This is the process by which a liquid becomes a gas.

What is evaporation?

300

This is the process by which a gas transitions to a liquid.

What is condensation?

300

The greenhouse gas carbon dioxide is released when these are burned. 

What are fossil fuels?

400

Of the planets in the Solar System, this one has the most prominent system of planetary rings.

What is Saturn?

400

Milk, cheese, yogurt, winter squash, canned sardines, salmon (with bones), and almonds are all good sources of this.

What is Calcium?

400

This is the process by which a solid becomes a liquid.

What is melting?

400

This makes up about 78% of Earth's atmosphere, making it the most element in air.

What is nitrogen?

400

These remove carbon from the atmosphere, so their loss and destruction causes a significant increase in greenhouse gases.

What are trees? (and other plants).

500

The only two planets in the Solar System that don’t have natural satellites (moons).

What are Venus and Mercury?

500

Lean meats, poultry, fish, eggs, dairy products, nuts, legumes, beans, and tofu are all good sources of this.

What is protein?

500

This is the process by which a substance transitions directly from a solid to a gas.

what is sublimation?

500

This gas is made up of one carbon atom bonded to four hydrogen atoms (CH4). It is the main constituent of natural gas. And, as a greenhouse gas, it has a significant impact on human-caused climate change. 

What is methane?

500

The melting of the polar ice caps affects climate change because the earth is does less of this.

What is reflect the heat from the sun.