Heat Transfer
Station 1- Conduction
Compare the thermal conductivity of two materials by using your sense of touch. We will find out if all metals conduct heat the same rate.
Station 2-Convection of liquid
Investigate the movement of liquids due to diff. in temperature.
Station 3-Convection of Gas
Investigate the convection of warm air as Ii rises from a lightened candle
Station 4-Radiation
We see if some materials absorb radiation better than others. Black and white sand will be exposed to the same amount of radiation and the increase in temperature will be measured.
Compare the thermal conductivity of two materials by using your sense of touch. We will find out if all metals conduct heat the same rate.
Station 2-Convection of liquid
Investigate the movement of liquids due to diff. in temperature.
Station 3-Convection of Gas
Investigate the convection of warm air as Ii rises from a lightened candle
Station 4-Radiation
We see if some materials absorb radiation better than others. Black and white sand will be exposed to the same amount of radiation and the increase in temperature will be measured.
Station 1: conduction
![Picture](/uploads/3/7/9/5/37954965/4978796_orig.png)
For part one all we did was touch a piece of copper and a plastic spoon to out wrist.
For the second part, we marked 9cm on three different metal strips and stuck a wax bead on the line. Then we placed them in hot water and timed how long until each bead moved past the line.
For the second part, we marked 9cm on three different metal strips and stuck a wax bead on the line. Then we placed them in hot water and timed how long until each bead moved past the line.
Observations:
I noticed that when I first put the metal strip and the plastic spoon on my wrist that the metal was the coolest. The metal got warm quicker than the spoon. After the metal touched my wrist for more than 10 seconds, the spoon was now cooler.
I noticed that when I first put the metal strip and the plastic spoon on my wrist that the metal was the coolest. The metal got warm quicker than the spoon. After the metal touched my wrist for more than 10 seconds, the spoon was now cooler.
Real world example:
When pick up a hot cup of koolaid and the physical touch of your hand touches the cup and your hand gets hot too.
When pick up a hot cup of koolaid and the physical touch of your hand touches the cup and your hand gets hot too.
station 2: convection
observations:
The temperature did not go up as high I thought it would, but the hot red water rose out of the smaller and went to the top. Soon it began to cool and sink to the bottom Real world example-
When you are cooking couscous, you put water in a pot. The couscous cooks because of convection. The pan touches the stove and heats the water. The hot water goes to the top and cools and then sinks again and again. |
In this lab, we put hot red dyed water in a beaker and set in cool water in a bigger beaker. After that, we recorded the temperature every minute for 3 minutes and observed the movement of the water
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station 3:convection
of gas
observations:
When the cylinder was on the candle, the light burnt out really fast, but when the divider with aluminum was placed in it, the light stayed light for more than 20 seconds. But as soon as I removed the divider, the light burnt out.
Real world example-
If you open a window if it is colder outside, then the cool air will flow in first than the warm air.
When the cylinder was on the candle, the light burnt out really fast, but when the divider with aluminum was placed in it, the light stayed light for more than 20 seconds. But as soon as I removed the divider, the light burnt out.
Real world example-
If you open a window if it is colder outside, then the cool air will flow in first than the warm air.
Station 4: Radiation
In this lab. we observed two beakers filled with white and black sand. Then we put them both under a heat lamp and recorded the temperature for the next 5 minutes.
observations-
I found that both beakers had almost the same temperature, but the black sand was hotter by one degree most of the time. The total change the black sand had was 4 degrees, while the white sand had a change of 6 degrees.
Real World example-
When you turn on a light bulb and you can feel the warmth if you put your hand near it.
I found that both beakers had almost the same temperature, but the black sand was hotter by one degree most of the time. The total change the black sand had was 4 degrees, while the white sand had a change of 6 degrees.
Real World example-
When you turn on a light bulb and you can feel the warmth if you put your hand near it.