Investigating Photosynthesis

Investigating Photosynthesis

How can we measure the rate of photosynthesis? What can impact photosynthesis?

Multiple Choice

Which structure carries out photosynthesis?

• chloroplast

• mitochondria

• cytoplasm

• vacuole

Multiple Choice

The pore on the underside of a leaf are called?

• Palisade cells

• Spongy mesophyll

• stomata

• lower epidermis

Multiple Choice

Why do leaves have a waxy cuticle?

• to stop carbon dioxide entering

• to increase water lose

• to reduce water lose

• to look nice

Multiple Choice

What are chlorophyll?

• the blue pigment in plants which absorb light

• the green pigment in plants which absorb carbon dioxide

• the green pigment in plants which absorbs light

• the structure which carries out respiration

Multiple Choice

True or False -Sunlight is absorbed by chlorophyll, a green pigment within the chloroplast.

• True

• False

Multiple Choice

True or False -Water enters a plant through its roots by diffusion and then travels to the leaves through tubes called phloem vessels.

• True

• False

Multiple Choice

True or False - Carbon Dioxide diffuses into leaves through stomata

• True

• False

Multiple Choice

True or False - Guard cells control the size of the stomata depending on the amount of oxygen received.

• True

• False

Multiple Choice

True or False - Photosynthesis takes place in the mitochondria. Light energy is used to convert water and carbon dioxide into glucose and oxygen.

• True

• False

Multiple Choice

True or False - Oxygen is a by product of photosynthesis, leaves the plant through the stomata.

• True

• False

Multiple Choice

What is an independent variable?

• the variable that is altered during a scientific experiment.

• the variable being tested or measured during a scientific experiment.

• a variable that is kept the same during a scientific experiment

Multiple Choice

What is an dependent variable?

• the variable that is altered during a scientific experiment.

• the variable being tested or measured during a scientific experiment.

• a variable that is kept the same during a scientific experiment

Multiple Choice

What is a control variable?

• the variable that is altered during a scientific experiment.

• the variable being tested or measured during a scientific experiment.

• a variable that is kept the same during a scientific experiment

Fill in the Blank

State what the independent variable is during the practical in the image.

Fill in the Blank

State what the dependent variable is during the practical in the image.

Fill in the Blank

State what the control variable is during the practical in the image.

Multiple Choice

When will the rate of photosynthesis be at it highest.

• closest to the light

• furthest away from the light

• at half way point

• non of the above.

Open Ended

Suggest why using a LED light bulb would be better.

Open Ended

How could they improve the reliable or validity of the experiment.

Fill in the Blank

1.What factors affect the rate of photosynthesis?

Fill in the Blank

2.Which factor is being tested in these pictures?

Fill in the Blank

3.How would you change this factor reaching the plant?

Open Ended

4.Why is the top method not accurate as the bottom?

Open Ended

5.Why would you use a thermometer?