# Power and energy

Define power and its relationship to energy. Calculate power using energy and time.

#### 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.Which two of the following are stores of energy?

Select two (2) boxes

1/6

Q2.What is the unit of energy?

2/6

Q3.How many seconds are in a minute?

3/6

Q4.Which is the correct order of energy stores for someone doing a bungee jump?

4/6

Q5.Match each heat transfer method to the correct description.
• convection
• conduction
• happens in solids
• energy is transferred by waves
• occurs in liquid or gas

Where you see this icon you can drag and drop! If you are using your keyboard select and move using space and the arrow keys.

5/6

Q6.Which of the following is used to reduce the rate at which heat is transferred in the home?

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.Which two of the following are stores of energy?

Select two (2) boxes

1/6

Q2.What is the unit of energy?

2/6

Q3.How many seconds are in a minute?

3/6

Q4.Which is the correct order of energy stores for someone doing a bungee jump?

4/6

Q5.Match each heat transfer method to the correct description.
• convection
• conduction
• happens in solids
• energy is transferred by waves
• occurs in liquid or gas

Where you see this icon you can drag and drop! If you are using your keyboard select and move using space and the arrow keys.

5/6

Q6.Which of the following is used to reduce the rate at which heat is transferred in the home?

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:

# Power and energy

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

Q1.Power is the rate at which is transferred.

Fill in the blank.

1/6

Q2.Match each of the following to the correct units.
• power
• energy
• time
• seconds
• watts
• joules

Where you see this icon you can drag and drop! If you are using your keyboard select and move using space and the arrow keys.

2/6

Q3.How do you convert a value given in kilowatts to watts?

3/6

Q4.How do you convert a time given in minutes to seconds?

4/6

Q5.Calculate the power if 115 J of energy is transferred in 5 seconds.

5/6

Q6.Calculate the power of hair straighteners that use 16,000 joules of energy in 1 minute and 40 seconds.

6/6

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

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

# Power and energy

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

Q1.Power is the rate at which is transferred.

Fill in the blank.

1/6

Q2.Match each of the following to the correct units.
• power
• energy
• time
• seconds
• watts
• joules

Where you see this icon you can drag and drop! If you are using your keyboard select and move using space and the arrow keys.

2/6

Q3.How do you convert a value given in kilowatts to watts?

3/6

Q4.How do you convert a time given in minutes to seconds?

4/6

Q5.Calculate the power if 115 J of energy is transferred in 5 seconds.

5/6

Q6.Calculate the power of hair straighteners that use 16,000 joules of energy in 1 minute and 40 seconds.

6/6

# Lesson summary: Power and energy

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga