Rate of Photosynthesis

Which of these factors will cause the rate of photosynthesis to be slow (select all that apply)?

• Low light levels

• Low carbon dioxide levels

• Temperature too cold

• High light levels

Tags

NGSS.MS-LS1-6

Which of these actions could a farmer take to speed up the growth of his tomato crops? Select all that apply:

• Put them in full sunlight

• Keep them somewhere cold

• Stop watering them

• Pump carbon dioxide into their glasshouse

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

What happens when temperatures are too cold?

• Chemical reactions speed up - higher frequency of collisions

• Chemical reactions slow down - less frequency of collisions

Tags

NGSS.MS-PS1-4

What happens when temperatures are optimal?

• Chemical reactions work fastest - particles move faster and collide most frequently

• Chemical reactions work slowest - particles move slow and collide infrequently

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What happens when temperature is very high?

• Enzymes controlling the reaction break down and the reaction stops happening.

• The reaction gets even faster since particles are moving even faster and collide more frequently.

• The reaction gets slower since the particles move slower and collide less frequently.

Tags

NGSS.HS-PS1-5

Can you keep on speeding up photosynthesis by pumping more and more carbon dioxide into your greenhouse?

• You can - more carbon dioxide means more reactants for photosynthesis

• You can't - other factors will become limited instead eg light, water, chlorophyll

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Can you keep on increasing the rate of photosynthesis by shining more and more intense sunlight onto your plants?

• Yes - photosynthesis requires sunlight so more sunlight means more photosynthesis

• No - after a while other factors become limited eg carbon dioxide, chlorophyll levels, water levels

Tags

NGSS.MS-LS1-6