8. Energy

Which gas diffuses through plant leaves to be used for photosynthesis?

• hydrogen

• oxygen

• nitrogen

• carbon dioxide

Tags

NGSS.HS-LS2-5

Most plants appear green because chlorophyll

• absorbs green light.
• absorbs violet light.
• reflects green light.
• does not absorb violet light.

Which of the following best describes photosynthesis?

• Photosynthesis converts light energy into chemical energy (glucose).

• Photosynthesis produces a variety of carbohydrates.

• Plants need oxygen to complete photosythesis

• Plants break down their food sources for energy

Tags

NGSS.HS-LS1-5

If carbon dioxide is removed from a plant's environment, what would you expect to happen to the plant's production of sugar (glucose)? (HINT: Think of what would happen if you removed an ingredient from a recipe!)

• MORE sugars will be produced
• The SAME NUMBER of sugars would be produced, but without Carbon Dioxide.
• FEWER will be produced
• the plant would not be affected in any way

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

What is the best possible reason photosynthesis would have a low rate in a very cold season?

• less CO₂ in the atmosphere

• ability to absorb light decreases

• required enzymes may slow down

• possibly less precipitation

Tags

NGSS.HS-LS2-3

Cell respiration breaks down glucose and other food to produce ___ energy.

• protein

• ATP

• oxygen

• solar

Tags

NGSS.HS-LS1-7

Based on the structures in this cell, it will be able to convert solar energy into chemical energy.

• True

• False

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Based on the structures in this cell, it will be able to convert chemical food energy into smaller chemical energy compounds.

• True

• False

Tags

NGSS.HS-LS1-7

A scientist noticed that during a chemical reaction the number of ATP molecules decreased. What can the scientist conclude from this observation?

• the reaction produced water

• the reaction consumed water

• the reaction caused an output of energy

• the reaction required an input of energy

Tags

NGSS.HS-LS2-3

Which student best compared the energy conversions that take place in photosynthesis and cell respiration.

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS1-5

NGSS.HS-LS1-7