Photsynthesis

Question 1

Where does photosyntheses take place

Answer 1

Chloroplasts

Question 2

Which type of organisms use photosynthesis to make their own food?

Answer 2

Producers

Question 3

What type of reaction is photosynthesis

Answer 3

Endothermic, because it takes in energy from its surroundings

Question 4

What is the word equation for photosynthesis

Answer 4

Carbon dioxide + water —> glucose + oxygen

Question 5

Symbol equation

Answer 5

6CO2+6H20—>C6H12O6+6O2

Question 6

What is the effect of temperature on the rate of photosynthesis?

Answer 6

• As temperature increases, so does the rate of photosynthesis
• Once the temperature exceeds the optimum, the rate of photosynthesis decreases as enzymes begin to denature

Question 7

What does light intensity change

Answer 7

As light intensity increases, so does the rate of photosynthesis

Question 8

What is the inverse square law

Answer 8

As the distance from the light source doubles, the light intensity quarters
Light intensity ∞ 1 / distance^2

Question 9

What is the effect of carbon dioxide concentration on the rate of photosynthesis?

Answer 9

As the concentration of carbon dioxide increases the rate of photosynthesis
increases

Question 10

What is a limiting factor

Answer 10

A factor that limits the rate of a reaction when there is not enough of it.

Question 11

When measuring the rate of oxygen prodiced in an experiment, why is counting the bubbles not accurate

Answer 11

• some bubbles may be miscounted
• different sized bubbles are different volumes of gas

Question 12

The rate of photosynthesis was recorded in 5°C intervals.

The experiment could be improved to get a more precise value for the optimum temperature.
Explain how.

Answer 12

Use smaller temperature intervals around the 30 degrees to see what exact temperature is the optimum one

Question 13

Describe where and how oxygen is produced in photosynthesis

Answer 13

-> photosynthesis takes place in the CHLOROPLASTS
-> LIGHT ENERGY splits WATER into H2 and O2 molecules

Question 14

Explain why the amount of oxygen given out in an experiment isn’t a true measure of the rate of photosynthesis

Answer 14

Respiration is occurring meaning some oxygen is used in respiration

Question 16

A light source is placed 0.5 m from a plant. The relative light intensity falling on the plant is 2 units.
The light source is moved to 1 m away.
What is the relative light intensity falling on the plant now?

Answer 16

0.5