BIOLOGY 1/18/11 THE LIGHT WINDMILL (RADIOMETER)

Left side activity… Examine the light windmill (radiometer) Draw a sketch of the windmill

ObservationsDescribe what you see happening.

Questions:

1. What does the radiometer show you about light?

2. Explain why the paddles spin.

Hypothesize:

What will the radiometer do in a dark closet? If, Then, because

Three Reflection Questions:

This surprised me because...

A question I still have is…

I learned that…….

COLOR WAVELENGTHS

1/21/11 BIOLOGY… BELLWORK Take out your graph for “Why are Plants Green?” Looking at your graph: 1) what wavelengths of visible light are absorbed

best by chlorophyll A? ____chlorophyll B?__ 2) what colors of visible light are absorbed best by

chlorophyll A? ____chlorophyll B?__ 3) based on this data, do plants absorb green

light? 4) Assuming light is energy (Monday’s topic),

which colors of light provide the most energy to plants?

Experimental set –up. Take out a sheet of paper. Design an experiment to test whether plants grow better under green light or white light.

EXPERIMENTAL DESIGN Question: Hypothesis (if, then, because) Materials: #’s BIG (include measuring device!) Procedure (use measuring device!)

1) 1st

2) 2nd 3) etc.

Include: 1 manipulated variable Controlled variables (things kept the same) Experimental control (something to compare)

DO PLANTS RESPIRE?

DATA: CO2 Response of Plants in Bromthymol Blue

Plant in Dark Plant in Light Without Plant

CONCLUSION:

1. Restate the hypothesis

. Start with “The hypothesis that ……..(insert hypothesis) was supported or not supported. DO NOT say that it was TRUE, CORRECT, etc.

2. GIVE THE RESULTS

. You must refer to your data- in this case it is the observation.

Sometimes it will be quantitative (numbers).

You compare the high numbers with the low

(extremes) or you compare the observation

with the experimental control.

GIVE THE BIG IDEA

(ah hah). Therefore ………

REVIEW STARTS TODAY!

Name all four organic (biomolecules that make up living tissue)

Where do these come from? Where does the protein in your palm come

from?