Photosynthesis

Question 1

What is photosynthesis?

Answer 1

The process of a plant making its own food for respiration and energy.

Question 2

What is the reactants and products of photosynthesis?

Answer 2

Carbon dioxide + water with light and chlorophyll ====> glucose + oxygen

Question 3

What is the symbol equation for photosynthesis?

Answer 3

6C2 + 6H2O ====> C6 H12 O6 + O6

Question 4

How does light help make glucose?

Answer 4

Light helps break down the atoms between water and carbon dioxide. It is then rearranged into glucose and oxygen.

Question 5

Is photosynthesis an endothermic or an exothermic reaction and why?

Answer 5

Its a endothermic reaction because it takes light energy from the enviorment.

Question 6

What are the adaptations of the leaf to help it photosynthesize?

Answer 6

1. Leaves have large surface areas to absorb as much light.
2. Thin leaves to allow short distances for diffusion of gasses.
3. Contains chlorophyll to absorb sunlight.
4. Have air spaces in leaves allowing oxygen to diffuse for oxygen to leave.
5. Veins in leaves to transport water into the leaf by the xylem.
6. Have guard cells to regulate the rate of transpiration by the stomata.

Question 7

What are limiting factors?

Answer 7

Something that the plant lacks which slows down its rate of photosynthesis.

Question 8

Describe the light graph.

Answer 8

As intensity of light increases rate of photosynthesis increases. Eventually it can no longer increase either because all chloroplasts are in action or another factor is limiting its rate of photosynthesis.

Question 9

Describe the temperature graph.

Answer 9

Photosynthesis is controlled by enzymes. If temperature gets to hot or too cold in can no longer conduct photosynthesis. As temperature increases rate of photosynthesis increases. If it gets to hot rate of photosynthesis decreases.

Question 10

What do plants use glucose for?

Answer 10

1. Turn it into starch to use as a energy storage when there are limiting factors.
2. They can mix glucose with minerals and nitrates from the soil to make ammino acids which is then turned in to protein which can be used for tissue repair through respiration.
3. They can make fats and oils which can be stored as a energy storage or kept in seeds to ensure germination.