Cycling of Matter

How does atmospheric nitrogen end up in the soil?

• Bacteria convert nitrogen into usable compounds

• Animals eat plants

• Plants use nitrogen in the soil

• Nitrogen compounds are removed from the atmosphere during precipitation.

Tags

NGSS.MS-LS2-3

Which step in the nitrogen cycle takes place after nitrogen enters the soil?

• Animals eat plants

• Bacteria in the roots of plants fix the nitrogen into usable compounds.

• Plants use nitrogen from the soil

• Lightning changes nitrogen gas into nitrogen compounds.

What are fossil fuels?

• Stored carbon such as oil and natural gas

• Stored nitrogen such as coal

• Dinosaur bones

• Oxygen and water combined in the soil

Which of the following does not move continuously through the environment? Think carefully about what environment means.

• energy

• nitrogen

• iron

• carbon

Decomposition releases what material back into the air and soil?

• energy

• oxygen

• carbon

• water

Tags

NGSS.MS-LS2-3

Where does an estimated 50% of Earth's oxygen come from?

• trees

• phytoplankton

• mammals

• grass

Tags

NGSS.MS-LS1-6

How do animals obtain nitrogen?

• From the air as we breathe

• From eating plants or other organisms

• From bacteria that fix the nitrogen into usable compounds.

• From the soil as decomposition happens

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How many times does carbon and oxygen cycle through the environment?

• once

• until all of it is used up

• until carbon becomes carbon dioxide

• continuously

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How does photosynthesis contribute to the carbon cycle?

• Carbon is removed from the atmosphere

• Carbon is added to the atmosphere as carbon dioxide

• Carbon is not part of photosynthesis

• Carbon is released into the atmosphere as sugars

Tags

NGSS.MS-LS1-6

How is cellular respiration involved in the carbon cycle?

• Carbon is removed from the atmosphere

• Carbon is released into the atmosphere as carbon dioxide

• Carbon is not involved in cellular respiration

• Carbon is converted into sugars during cellular respiration

Tags

NGSS.MS-LS1-7

NGSS.MS-LS2-3