SCI115 PAPER ONE

profileMrs.bankZ
SCI115LightSpectrumPlantGrowthWorksheetw20.docx

Worksheet for Light Spectrum and Plant Growth Lab

Page 1 of 2 Rev. W20

Instructions:

· Go to the following Virtual Lab Website http://www.glencoe.com/sites/common_assets/science/virtual_labs/LS12/LS12.html

· The virtual lab runs under Flash. You may need to enable your browser to run it.

· Watch the short video clip about the white light spectrum and the pigments in plants.

· Using the controls to run the experiment, collect data to fill in the tables for radish and lettuce.

· Select the plant which will be planted in all pots, 3 pots per chamber.

· Select the color for each chamber.

· Turn the light switch “On” to run the experiment for a simulated 30 days.

· Use your mouse to grab the ruler and measure the height of the tallest part of the plant to the nearest centimeter. The height of each plant counts as one observation.

· Record the data in the appropriate data table.

· When you have recorded all three observations for a particular plant grown under particular conditions, calculate the average height of the plant under those conditions. To calculate the average, find the sum of the three observations, and then divide by three.

Table for Spinach (already filled out)

COLOR

Red

Orange

Green

Blue

Violet

Measured Height of plant

(cm)

Observation 1

16

16

1

18

14

Observation 2

22

17

3

22

19

Observation 3

17

12

2

17

15

AVERAGE

18.3

15.0

2.0

19.0

16.0

TABLES TO FILL OUT

1. Table for Radish

COLOR

Red

Orange

Green

Blue

Violet

Measured Height of plant

(cm)

Observation 1

Observation 2

Observation 3

AVERAGE

2. Table for Lettuce

COLOR

Red

Orange

Green

Blue

Violet

Measured Height of plant

(cm)

Observation 1

Observation 2

Observation 3

AVERAGE

QUESTIONS TO ANSWER

3. Based on these observations, which color of light causes the greatest amount of plant growth?

4. Based on these observations, which color of light causes the least amount of plant growth?

5. In a short paragraph, explain how these observations are consistent with the information presented in the short video?

6. Given that white light contains all colors of the spectrum, what growth results would you expect under white light? Explain why.