Biochemical Cycles

Multiple Choice

Humans burn fossil fuels and wood, releasing carbon dioxide into the atmosphere. This carbon dioxide is then absorbed by trees for photosynthesis. These processes are contributory to which chemical cycle?

• Water cycle

• Carbon cycle

• Phosphorous cycle

• Nitrogen cycle

Multiple Choice

How does the human body return carbon to the atmosphere in the carbon cycle?

• Pooping

• Cellular Respiration

• Photosynthesis

• Formulation of glucose

Multiple Choice

Which of the following is an example of human impact on the carbon cycle?

• The increased production of methane gases from cattle farms

• The burning of fossil fuels

• Driving automobiles

• All of the above

Multiple Choice

If a forest fire occurs, what will happen to the carbon in the forest?

• It will go into the soil

• It will runoff into nearby streams and rivers

• It will go into the atmosphere

• It will be destroyed

Multiple Choice

What kind of organism takes out the most carbon from the atmosphere?

• Plants

• Animals

• Bacteria

• Humans

Labeling

Drag labels to their correct position on the image

CO2

Photosynthesis

Dead organisms and waste products

Animal respiration

Auto and factory emissions

Plant respiration

Fill in the Blanks

Does the following process add or remove CO₂ from the environment?

Combustion of fossil fuels.

Fill in the Blanks

Does the following process add or remove CO₂ from the environment?

Photosynthesis

Fill in the Blanks

Does the following process add or remove CO₂ from the environment?

Cellular respiration

Fill in the Blanks

Does the following process add or remove CO₂ from the environment?

Decomposition of organic matter

Open Ended

How do plants use carbon dioxide?

Multiple Choice

The step of the nitrogen cycle that is in red is called...

• Denitrification

• Nitrification

• Nitrogen Fixation

• Ammonification

Multiple Choice

The step of the nitrogen cycle that is in red is called...

• Denitrification

• Nitrification

• Nitrogen Fixation

• Ammonification

Multiple Choice

The step of the nitrogen cycle that is in red is called...

• Denitrification

• Nitrification

• Nitrogen Fixation

• Ammonification

Multiple Choice

The step of the nitrogen cycle that is in red is called...

• Denitrification

• Nitrification

• Nitrogen Fixation

• Ammonification

Multiple Choice

The step of the nitrogen cycle that is in red is called...

• Denitrification

• Nitrification

• Assimilation

• Ammonification

Multiple Choice

Nitrogen fixation...

• animals eat the plants and other animals that contain nitrogen and release it through their waste

• Bacteria in the soil and lightning in the atmosphere “fix” the nitrogen

• Once in the ground, bacteria in the soil also nitrify the nitrogen

• plants absorb nitrogen through their roots and return it back to the atmosphere

Multiple Choice

Nitrification...

• animals eat the plants and other animals that contain nitrogen and release it through their waste

• Bacteria in the soil and lightning in the atmosphere “fix” the nitrogen

• Once in the ground, bacteria in the soil also nitrify the nitrogen

• plants absorb nitrogen through their roots and return it back to the atmosphere

Multiple Choice

Ammonification...

• animals eat the plants and other animals that contain nitrogen and release it through their waste

• Bacteria in the soil and lightning in the atmosphere “fix” the nitrogen

• Once in the ground, bacteria in the soil also nitrify the nitrogen

• plants absorb nitrogen through their roots and return it back to the atmosphere

Multiple Choice

Assimilation...

• animals eat the plants and other animals that contain nitrogen and release it through their waste

• Bacteria in the soil and lightning in the atmosphere “fix” the nitrogen

• Once in the ground, bacteria in the soil also nitrify the nitrogen

• plants absorb nitrogen through their roots and return it back to the atmosphere

Multiple Choice

Denitrification...

• animals eat the plants and other animals that contain nitrogen and release it through their waste

• Bacteria in the soil and lightning in the atmosphere “fix” the nitrogen

• nitrogen is released back into the atmosphere from the animal’s waste or decomposers

• plants absorb nitrogen through their roots and return it back to the atmosphere

Multiple Choice

What converts nitrogen gas into a usable form for plants and animals?

• bacteria

• rain

• fungi

• car exhaust

Multiple Choice

Organisms that need nitrogen to survive.

• only plants

• only animals

• only bacteria

• all living things

Multiple Choice

How do animals get the nitrogen they need?

• From the air they breathe

• From the water they drink

• From the food they eat

• From the sun

Multiple Choice

Plants and animals cannot use nitrogen directly from the air.

• True

• False

Multiple Choice

According to this diagram, plants use nitrogen to make _________________________

• bacteria

• animals

• proteins

• decomposers

Multiple Choice

What part of the water cycle does this picture show?

• condensation

• precipitation

• evaporation

Multiple Choice

Which is the opposite of condensation?

• runoff

• evaporation

• precipitation

• transpiration

Multiple Choice

Which best explains why runoff is important?

• It returns water to other locations on Earth

• It increases the chance of flooding

• It makes evaporation occur faster

• It increases condensation

Multiple Choice

What is it called when WATER is FORMED from an LIQUID to a WATER VAPOR Oor an [GAS]?

• EVAPORATION

• PRECIPITATION

• TRANSPIRATION

Multiple Choice

What is it called when plants give off water vapor as a waste product?

• condensation

• evaporation

• sublimation

• transpiration

Multiple Choice

Which stage does the #2 show in the diagram?

• condensation

• evaporation

• precipitation

• run off

Multiple Choice

Which stage does the #3 show in the diagram?

• condensation

• evaporation

• precipitation

• run off

Multiple Choice

Which stage does the #3 show in the diagram?

• condensation

• evaporation

• precipitation

• run off

Multiple Choice

The ________ is the driving force of the earth's surface.

• sun

• moon 

• stars

Multiple Choice

The water cycle has no start or end

• true

• false

Multiple Choice

This is a picture of

• snow

• rain

• fog

• hail

Multiple Choice

Water freezes inside a cloud before it falls

• Rain

• Sleet

• Hail

• Snow