Science Lab- Green House Earth essays

Science Lab- Green House Earth essays Problem: To determine what surface and color best obsorbs heat. 2 plastic hemispheres with tops a bases Safety Percautions: Be sure to keep water from contacting any part of the lamp assembly. Hypothesis: By using all the instruments givin to us, we will be able to figure out what surface and color best obsorbs heat. I think that the dark hard surface will obsorb more. Procedure: First, you have to set up plastic hemisphere with soil and water, thermometers, and a heat lamp(look at figure 2) Then you position the bulb of the heat lamp 20 cm above the hemispheres as shown in the diagram, being sure that the energy from the lamp is divided evenly between the two hemispheres. We had to work in two different groups, group A and group B. Our teacher gave us the groups. Both group A and group B will follow the same procedure for this first step. When temperature equilibrium has been reached, we had to record the beginning temperature for the soil and water and record these values under time 0 in the Data Table on the other page. Then, you turn on the lamp and record the soil and water temperatures every minute for 10 min. And we had to be sure the hempishperes are not covered. After the 10 min, we turned off the lamp and removed it from the area near the hemishperes. Then we had to draw a graph of the data on the graph grid provided. The time goes on the horizontal axis. Theory and Discussion: My hypthesis was correct, the dark rough soil obsorbed more energy then the water did. This is because dark rough surfaces obsorb more light energy then light smooth surfaces. Doing this lab helped my goup and I learn how dark colors obsorb a lot more heat then the light surfaces did. And after the 10 min. when we ...