Lab Report: Greenhouse in a Beaker
Introduction:
We are preforming this experiment to test whether or not Carbon Dioxide (CO2 ) has an effect on the temperature of the air. The basis of the general global warming theory accepted by society is that the more CO2 in the air the hotter the air is. This experiment will show us if this claim has any validity to it.
Hypothesis:
I believe that if we add CO2 to the beaker then it will be hotter than the beaker without CO2.
State Materials:
2 600 mL Beakers
1 250 mL Flask
1 Rubber stopper with hole
1 Vinyl tubing, 3/16” diameter, 60 cm long
1 Clip light with 1 75 watt bulb
1 Ruler
2 Probe thermometers
Small piece masking tape
4 Alka-Seltzer tablets
Science notebooks
Safety glasses
240 mL Water (room temperature)
State Procedure:
Part 1, Day
1. Set up the light source 15 cm in front of the two beakers. The beakers should be receiving equal light.
2. Insert the tubing through the hole in the 250 mL flask. Place the other end of the hose near the bottom of one of the beakers. Secure the tubing inside the beaker with a small piece of masking tape.
3. Add 120 mL of water to the flask.
4. Turn on the clip light. Wait for the temperature in each beaker to stabilize. The temperatures in the beakers should be similar, but they do not have to be exactly the same.
5. Record the stable temperature of each beaker in the data table.
6. Break two Alka-Seltzer tablets in half and drop the pieces into the flask. Secure the rubber stopper.
7. Record the temperature of each beaker every 30 seconds for three minutes.
Part 2, Night
1. After you have data to model temperatures during the day, empty out your beakers and flask. Refill the flask with 120 mL water.
Re-secure the tubing inside one of the beakers.
2. Turn on the clip light. Wait for the temperature to stabilize. The temperatures in the beakers should be similar, but they do not have to be exactly the same.
3. Record the...