Thermal Insulators

Question 1

Write a method for investigating different types of materials.

Answer 1

1. Put the small beaker inside the larger beaker.
2. Use the kettle to boil water. Put 80 cm3 of this hot water into the small beaker.
3. Use a piece of cardboard as a lid for the large beaker. The cardboard must have a hole for the thermometer.
4. Put the thermometer through the hole in the cardboard lid so that its bulb is in the hot water.
5. Record the temperature of the water and start the stopwatch.
6. Record the temperature of the water every 3 minutes for 15minute
7. Record results in a table
8. Repeat steps 1‒6 using different materials each time to fill the space between the small and large beaker.
   Make sure you use the same volume of water each tim

Question 2

Why does the beaker need a lid?

Answer 2

To reduce heat loss to the surroundings and increase accuracy of results

Question 3

What is the independent variable?

Answer 3

Thickness or material

Question 4

What is the dependant variable?

Answer 4

Change in temperature

Question 5

Which variables need to be controlled?

Answer 5

Volume of water
Shape of beaker
Lid