Cycles of Matter

Cycles of Matter

Review!

The Water Cycle

Evaporation --> Condensation --> Precipitation

Three important processes of the Water Cycle

• Evaporation --> liquid turning into a gas

• Condensation --> gas turning into a liquid, forms clouds

• Precipitation --> liquid droplets falling from the clouds

Multiple Choice

Which describes the process of evaporation?

• puddle on a warm day disappearing into thin air.

• water droplets on a window

• rain

Multiple Choice

What process forms clouds?

• Evaporation

• Condensation

• Precipitation

• Transpiration

Transpiration

Plants are sweating! Water vapor is escaping through their leaves.

Fill in the Blank

Sweating is to humans as ______________ is to plants.

The Carbon-Oxygen Cycle

Key Words

Producer, Consumer, Decomposer, Photosynthesis, Respiration

Key Vocabulary Words

• Producer --> organisms that gain energy by making their own food, goes through photosynthesis

• Consumer --> organisms that need to eat other organisms to gain energy.

• Decomposer--> organism that breaks down dead organisms and returns nutrients back to the soil.

Multiple Choice

Which is an example of a producer?

• Algae

• Cow

• Worm

Multiple Choice

Which is an example of a decomposer?

• Bacteria

• Algae

• Humans

Key Vocabulary Words Continued

• Photosynthesis --> process that plants go through to produce food and release oxygen to humans.

• Respiration --> The breathing process

Multiple Choice

What three things do plants need to go through photosynthesis?

• Carbon Dioxide, fish, food

• Carbon Dioxide, sunlight, water

• Oxygen, Sunlight, Water

Multiple Choice

What do humans breathe in?

• Oxygen

• Carbon Dioxide

Multiple Choice

What gas do plants absorb?

• Carbon Dioxide

• Oxygen

How Humans Impact the Carbon-Oxygen Cycle!

Humans complete everyday activities that impact the Carbon-Oxygen Cycle.

*Burn Fossil Fuelds (gasoline, oil)

*Deforestation (cut down trees)

*Build Fires

*Breathe (humans breathe in oxygen and breathe out carbon dioxide)

Open Ended

What would happen to the carbon-oxygen cycle if all the producers died?

The Nitrogen Cycle

Decomposer, Nitrogen Fixation, Nodules, Nitrogen-Fixing Bacteria

Key Terms

• Decomposer --> Breaks down organisms and returns nitrogen back into the soil

• Nitrogen Fixation --> process that turns "free nitrogen" into usable nitrogen.

• Nodules --> Bumps on roots of plants that house bacteria.

• Nitrogen-Fixing Bacteria --> Housed in the nodules of plants, changes nitrogen into usable form.

Nitrogen Cycle Key Concepts

• ALL Organisms need nitrogen

• About 78 % of our air is nitrogen

• We CANNOT use the "free nitrogen" in the air that is why it must be "fixed" first.

• Plants get nitrogen through their roots from the soil.

• Animals get nitrogen by consuming other things that have nitrogen in them (plants or other animals)

Multiple Select

Choose which percentage of nitrogen makes up the air.

• 78 %

• 92 %

• 100 %

Multiple Choice

Which organisms need nitrogen?

• Plants

• Animals

• Humans

• All of the Above

Multiple Choice

We can use the "free" nitrogen that is in the air.

• TRUE

• FALSE

Open Ended

What would happen if all the nitrogen-fixing organisms died?

Open Ended

What would happen if one part of a cycle did not happen?