Nitrogen Cycle
What do nitrogen-fixing bacteria do?
They change atmospheric nitrogen into a form plants can use.
What does the Calvin cycle do?
It makes sugars using energy.
What is nonpoint source pollution?
Pollution from many sources, like runoff from fields.
What is the purpose of photosynthesis?
To turn sunlight into glucose for energy.
What do carbohydrates provide?
Quick energy
How does removing animals affect nitrogen in the soil?
Less nitrogen goes back to the soil, which hurts plants.
How do fossil fuels affect the carbon cycle?
They release CO2, contributing to climate change.
What is point source pollution?
Pollution from specific places, like factories.
What is the equation for photosynthesis?
Sunlight + 6H2O + 6CO2 —-> C6H12O6 + 6O2
What do lipids do?
Store long-term energy.
What happens if there are fewer nitrates?
Crops grow poorly.
What is the greenhouse effect?
It's when heat is trapped in the atmosphere, warming the Earth.
What is urban runoff?
Rainwater that carries pollutants from streets.
What are the products of photosynthesis?
Glucose and oxygen.
What are proteins made of?
Amino acids
What is nitrogen fixation?
It's when bacteria convert nitrogen from the air into ammonium.
How does carbon move in nature?
Through photosynthesis and respiration.
How does agricultural runoff affect water?
It brings fertilizers and pesticides into water bodies.
What is the equation for cellular respiration?
6O2 + C6H12O6 —>6CO2 + 6H2O + ATP
What is the role of nucleic acids?
They store genetic information.
How do humans affect the nitrogen cycle?
Human activities can disrupt it and harm plants and animals.
What human actions increase carbon levels?
Deforestation and burning fossil fuels.
What harm does sewage cause?
It pollutes water and can harm aquatic life.
How are photosynthesis and cellular respiration related?
Photosynthesis makes glucose and oxygen, used in respiration.
What do enzymes do?
Speed up chemical reactions.