Unit 2 Zombie Fires: Lesson 1-6 Test Review

What is the primary result of photosynthesis in plants?

• Plants convert oxygen and water into carbon dioxide and sugar

• Plants convert carbon dioxide and water into sugar and oxygen

• Plants convert sugar and oxygen into carbon dioxide and water

• Plants convert sugar and carbon dioxide into oxygen and water

What is the main fuel source for zombie fires?

• Dry grass

• Peat in the thawing permafrost

• Dead trees

• Trees

Why are zombie fires becoming more common?

• There is less solar radiation in the Arctic

• They are not becoming more common

• Climate change is causing permafrost to thaw more frequently

• More lightning strikes in the Arctic

How do zombie fires release energy and matter into the atmosphere?

• By absorbing carbon dioxide from the air

• Through the slow decomposition of plants

• By burning peat and releasing carbon dioxide and smoke

• By creating a heat wave that warms the Arctic

What is peat made from?

• Coal

• Fossilized plants

• Animal remains

• Minerals from the earth

Why does peat burn so much when ignited?

• It has a low carbon content

• It is carbon-based and releases CO₂ when burned

• It burns quickly due to high moisture content

• It is made of living plants

What happens when peat burns?

• It releases carbon dioxide and energy

• It absorbs carbon dioxide

• It creates oxygen

• It forms new plants

What is permafrost?

• A type of plant found in the Arctic

• Ground that stays frozen for many years, even centuries

• A type of soil that is warm and moist

• Frozen water in the Arctic

How does permafrost relate to peat?

• Permafrost prevents peat from forming

• Peat is found in permafrost and is revealed when permafrost thaws

• Peat creates permafrost

• Peat causes permafrost to freeze

Why does peat accumulate in permafrost?

• The decomposition of plants is sped up

• Cold temperatures and low oxygen slow decomposition

• There is excess water that prevents decomposition

• Plants are constantly growing and adding to the peat