# Energy in the home

Make calculations on energy use in the home. Relate power to kilowatt hours and calculate the cost of energy.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Energy is measured in ...

1/6

Q2.Power is measured in ...

2/6

Q3.Which of the following is not a standard unit of time?

3/6

Q4.How do you convert a price given in pence to pounds?

4/6

Q5.Calculate the energy transferred by a 1,500 watt heater in 20 seconds.

5/6

Q6.How long does it take for a 1,750 W kettle to boil water with 31,500 J of energy?

6/6

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Energy is measured in ...

1/6

Q2.Power is measured in ...

2/6

Q3.Which of the following is not a standard unit of time?

3/6

Q4.How do you convert a price given in pence to pounds?

4/6

Q5.Calculate the energy transferred by a 1,500 watt heater in 20 seconds.

5/6

Q6.How long does it take for a 1,750 W kettle to boil water with 31,500 J of energy?

6/6

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Energy in the home

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Convert 126 minutes into hours.

1/6

Q2.Which is the correct equation for calculating energy?

2/6

Q3.Which equation is correct for calculating total cost of energy used in the home?

3/6

Q4.On an electricity bill, the present reading is 65,421 and the previous reading was 65,127. How many kWh was charged for this bill?

4/6

Q5.An object has a power of 900 W and is on for 2 hours. Calculate the energy used in kWh.

5/6

Q6.Calculate the cost of electricity for a hairdryer that uses 1.2 kWh at a cost of 34p per kWh.

6/6

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Energy in the home

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Convert 126 minutes into hours.

1/6

Q2.Which is the correct equation for calculating energy?

2/6

Q3.Which equation is correct for calculating total cost of energy used in the home?

3/6

Q4.On an electricity bill, the present reading is 65,421 and the previous reading was 65,127. How many kWh was charged for this bill?

4/6

Q5.An object has a power of 900 W and is on for 2 hours. Calculate the energy used in kWh.

5/6

Q6.Calculate the cost of electricity for a hairdryer that uses 1.2 kWh at a cost of 34p per kWh.

6/6

# Lesson summary: Energy in the home

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga