Required Practical 1✔️ (thermal Insulation)

Question 1

Explain steps 1 and 2 for the method?

Answer 1

1)Place a small beaker into a larger beaker (with the gap between filled with insulation) -
Fill the small beaker with hot water from a kettle

2)Put a piece of cardboard over the beakers as a lid (should have a hole suitable for a thermometer)

Question 2

Explain steps 3 and 4 for the method?

Answer 2

3)Place a thermometer into the smaller beaker through the hole and record the temperature of the water and start the stopwatch

4)Record the temperature of the water every 2 minutes for 20 minutes

Question 3

Explain step 5 for the method?

Answer 3

5)repeat each step again, each time packing the space between the large and small beaker with chosen insulating materials - then plot a graph of temp against time

Question 4

Give 2 hazards and control measures?

Answer 4

• boiling water which could scald skin prevented by not overfilling the kettle, if scalded wash hand under cold water
• knocking beaker off the desk - could scald skin which can be prevented by placing the beaker away from the edge

Question 5

What is the aim of the experiment?

Answer 5

To compare the effectiveness of different materials as thermal insulators

Question 6

Give a list of the equipment needed?

Answer 6

• thermometer
• stopwatch
• piece of card
• large beaker
• small beaker
• insulating materials

Question 7

What are the control variables?

Answer 7

• volume of water
• starting temperature of the water
• time

Question 8

What is the independent variable?

Answer 8

• Insulating material used
• number of layers around the large beaker

Question 9

What is the dependent variable?

Answer 9

The temperature of the water

Question 10

How can the experiment be improved to measure thickness?

Answer 10

By wrapping the large beaker in a sheet of newspaper and repeating steps 1 to 5, by adding another layer of newspaper until there are 10 layers of newspaper