Spinach Photosynthesis Lab Report

Photosynthesis Investigation

Research Question

How does the concentration of glucose affects the photosynthesis rate of a spinach leaf when exposed to a LED light source?

Hypothesis

My hypothesis is that when the concentration of glucose is glucose increasing the faster the rate of photosynthesis will occur.The LED light will make the photosynthesis work even faster so the spinach leaves will probably go up faster than normal.I think that the glucose will help the rate of photosynthesis because it will improve the plant in growth and give the plant more energy.

Variables

Independent Variable

Dependant Variable

3 Control Variable

Concentration of Glucose

The Rate of Photosynthesis

LED light source

The distance of the light from the

The amount of spinach leaves(3)

I will keep this the same because otherwise the tests wouldn’t really work out because then I wouldn’t have a fair test.

Method

Collect all your materials

Set everything up

Put the 3 spinach leaves in the syringe

Put water in the syringe with the spinach leaves

Put your finger over the hole where the water goes out from the syringe

Pull the syringe up and let it go

Test the spinach leaves if they sink

If they do then empty the water out and put the spinach leaves in a beaker

If it doesn’t work try it again

Or punch out another few spinach leaves

In another beaker mix the sodium carbonate with the glucose

Keep the amount of sodium carbonate the same every treatment

Increase the amount of glucose by 1% every treatment

Place the 5 test tubes in the test tube rack

Put the LED light in front of the test tube rack

Keep the LED light source 5 cm away from the test tube rack

Do not change the distance!

Start the timer when you insert the 3 spinach leaves in each of the