Year 9 Science · Unit 3 · Lesson 7

Heat and Temperature

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

Odd one out

Circle the item that does not belong in each group. Then explain why it doesn't fit in the answer column.

#GroupYour answer (odd one + reason)
1 Joule    Kelvin    Celsius    Fahrenheit
2 Thermal equilibrium    Heat flows from hot to cold    Cold is transferred from cold objects    Temperature equalises over time
3 Swimming pool at 20°C    Mug of coffee at 80°C    Kettle of boiling water at 100°C    Small spark at 600°C

Your Turn

Fill the gap

Choose the correct word from the word bank to complete each sentence. Two words will not be used.

heat temperature particles average equilibrium Joule Kelvin radiation conduction

is a measure of the kinetic energy of the in a substance. When particles move faster on average, the temperature rises. is the transfer of thermal energy from a hotter object to a cooler one. It is measured in . Temperature can be measured in degrees Celsius or in . The Kelvin scale starts at absolute zero, the point where particles have no kinetic energy. When two objects in contact reach the same temperature, we say they have reached thermal .

Show What You Know

1. A swimming pool is at 20°C. A mug of coffee is at 80°C. Which object has more thermal energy? Explain why your answer might be surprising, using what you know about particles and mass.

Recall 2 marks

2. The coldest possible temperature is absolute zero (0 K = −273°C). Explain what is physically happening to particles at this temperature, and why it is impossible to go any colder.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 9 Science · Unit 3 · Lesson 7 · Foundation Worksheet