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Heat Lamp Variable
What are the variables (Independent, dependent and controlled) in this experiment?
Title:
Does carbon dioxide heat up the globe faster than oxygen?
Purpose:
The purpose of this experiment is to find out if carbon dioxide (from cars etc) causes the earth’s temperature to rise. Scientists often suggest that carbon dioxide is causing a flux in temperature which is causing global warming. This experiment will try to see if carbon dioxide actually causes a rise in temperature.
Apparatus:
•Data logger
•Two temperature probes (if we don’t have those, we will use an electronic thermometer)
•Two 2 litre plastic pop bottles
•Two clamp stands
•Carbon dioxide & air
•Two lamps
•Plasticine
If you know the 3 variables, it would be greatly appreciated?
It helps to know the experimental method that you're using. Look at that and make sure that what I'm listening makes sense to you. Basically, the independent variable is the one that you alter throughout the experiment. The dependent variable is the one that you measure. The controlled variables are ones that you keep the same. My guesses:
Independent: The amount of CO2 versus air in the different bottles.
Dependent: The temperature of the two different bottles.
Controls: Anything you're keeping the same, such as identical lamps, identical starting temperatures, identical bottles and volumes and pressures in the bottles, identical distance from lamp to bottle, identical angle of lamp to bottle, that sort of thing. Anything you purposefully make the same between the two different bottles counts as a controlled variable.
Alternate meaning of control: This is the experiment that you do to make sure that your experiment works. An example here would be to set up another bottle without a lamp on it to measure how much temperature fluctuates in the bottles anyway, or to set one up with a different gas mix (one that shouldn't affect temperature) to prove that it's the addition of extra carbon dioxide causing the change, instead of there just being less of some other gas in the air.
Note: You aren't really comparing CO2 and O2 here. You're comparing CO2 and air. To compare CO2 and O2 effects, you'd have to do mixes of air and CO2, AND similar mixes of air and O2.
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Brandt Professional Model Infra-red Lamp, Variable Heat Control $498.51 Features of the Brandt Professional Model Infra-red Lamp: Designed for use in hospitals, clinics and large practices. Equipped with 3 conductor cord sets with hospital grade plugs, and a control panel that houses an on/off indicator light. 750W ceramic heating element electromagnetically transmits extremely uniform heat to the patient. Ceramic heaters change color from coral to gray when energized. No visible light produced. Nickel-chromium resistance wire embedded into a ceramic casting provides uniform heat transmission. Adjustable: 31" - 52". Extends 15" over bed. 96% thermal efficiency with low element surface temperature. Inner body of the element is filled with ceramic fiber insulation, which conserves energy, maximizes efficiency and minimizes heat build-up at the terminal area. Heat up time is 3 — 9 minutes to reach 90° of maximum temperature. |
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Solaira Variable Heat Controller - 1.5kW120V to 3.2kW240V $349 The Solaira Variable Heat Controller is a weatherproof, digital, solid-state power control designed to provide a convenient way to adjust heat output on electric infrared heating elements. It allows for adjusting heat output from 10 to 100% of the available power. Features an on/off switch and the �SOFT START� feature which will bring the power up slowly to the heater. |
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Exo Terra Heat Wave Lamp Ceramic Heat Emitter $27.49 Exo Terra Heat Wave Lamp Ceramic Heat Emitter |
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Exo Terra Heat-Glo Infrared Terrarium Heat Lamp $11.09 Exo Terra Heat-Glo Infrared Terrarium Heat Lamp |
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0283022 - Variable Temp Heat Gun $75.45 [741959] UPC: 024964112395 13.31L x 23.87W x 10.94H 4.22 LB 2.01 Cubes |
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Measuring the Ecological Niche of an Organism
What are the variables.....?
Okay, so I am doing a science project and I am having a hard time finding the variables out....
My turtle is going to dig in 3 different kinds of terrain, rock, soil and sand..
My turtle will have a heat lamp, I will record the data every 30 seconds..
What are my variables?
Manipulated
Responding
Controlled
manipulated: kinds of terrain
responding: how far he digs or whatever else is dependent on terrain
controlled: heat lamp temp
