Carbon Cycle Quiz

How does an increase in carbon dioxide affect Earth's temperature?

• It makes Earth colder.
• It has no effect on Earth's temperature.
• It makes Earth hotter.
• It causes extreme weather events.

Why is it important to keep the carbon cycle balanced?

• To prevent plants from growing too much.
• To maintain a stable climate on Earth.
• To increase the amount of oxygen in the air.
• To reduce the number of animals on Earth.

If it weren't for the greenhouse effect, Earth would look like...

• A ball of fire
• A lush, green oasis
• A giant ice ball
• A desert wasteland

What does acidic mean?

• the state of being neutral or having a pH of 7
• having a pH less than 7, indicating the presence of acid
• having the ability to cause damage or destruction to other substances through chemical reactions
• The plant naturally tastes sour

What is the pH of ocean water?

• pH 6
• pH 7
• pH 8
• pH 9

What causes ocean acidification?

• Release of carbon dioxide into the air
• Salt content in ocean water
• Exhaust from cars and factories
• Absorption of sunlight by the ocean

How does ocean acidification affect certain animals?

• It makes them grow larger shells
• It helps them adapt to changing environments
• It weakens their shells and makes it difficult for them to survive
• It improves their ability to reproduce

What does climate mean?

• Any form of water that falls from the atmosphere to the Earth's surface, such as rain, snow, sleet, or hail.
• A specific event that happens over a short period of time
• The average weather conditions in a place over a long period of time (30 years or more).
• A prolonged period of abnormally low rainfall, resulting in a shortage of water supply.

What does weather mean?

• Any form of water that falls from the atmosphere to the Earth's surface, such as rain, snow, sleet, or hail.
• A specific event that happens over a short period of time
• The average weather conditions in a place over a long period of time (30 years or more).
• A prolonged period of abnormally low rainfall, resulting in a shortage of water supply.

How do scientists use tree rings to learn about past climate?

• Tree rings can tell us how old a tree is, but they cannot provide any information about past climate.
• The number of tree rings can indicate the amount of rainfall in a particular year.
• The color of tree rings can give information about the temperature during different seasons.
• Tree rings can only provide information about the tree's growth rate, not about past climate.