# Energy in food

This lesson explores the energy in different foods and revises key ideas about how to run a successful investigation including: identifying variables, making predictions, writing a method, analysing results and writing a conclusion.

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!

## Question 10

Q1.Complete this definition: power is the rate at which _______ is transferred

1/10

Q2.What is the standard unit for time?

2/10

Q3.Energy = ________ x time

3/10

Q4.What symbol goes in the gap between energy and power in this equation? time = energy __?__ power

4/10

Q5.What is 3 hours in seconds?

5/10

Q6.Which of these equations is incorrect?

6/10

Q7.A 10 W oven transfers 60 J of energy. How long is the oven on for?

7/10

Q8.A 24 W lamp is turned on for 8 seconds, how much energy is transferred by the lamp?

8/10

Q9.Complete the equation: cost = _____________ x price per unit

9/10

Q10.A 5 kW oven is turned on for 6 h. Price per unit is 10 p, how much will this cost?

10/10

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!

## Question 10

Q1.Complete this definition: power is the rate at which _______ is transferred

1/10

Q2.What is the standard unit for time?

2/10

Q3.Energy = ________ x time

3/10

Q4.What symbol goes in the gap between energy and power in this equation? time = energy __?__ power

4/10

Q5.What is 3 hours in seconds?

5/10

Q6.Which of these equations is incorrect?

6/10

Q7.A 10 W oven transfers 60 J of energy. How long is the oven on for?

7/10

Q8.A 24 W lamp is turned on for 8 seconds, how much energy is transferred by the lamp?

8/10

Q9.Complete the equation: cost = _____________ x price per unit

9/10

Q10.A 5 kW oven is turned on for 6 h. Price per unit is 10 p, how much will this cost?

10/10

# 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.

Quiz:

# Energy in Food

This quiz will have questions from the lesson called 'Energy in Food' and previous lessons in the Energy topic. Please complete this quiz to consolidate your learning.

## Question 10

Q1.What does kcal stand for?

1/10

Q2.How many J in 45 kJ?

2/10

Q3.Which energy store is found in food?

3/10

Q4.In the burning food investigation where you are trying to find out which food contains the most energy - what is the independent variable?

4/10

Q5.In the burning food investigation where you are trying to find out which food contains the most energy - what piece of equipment is used to hold the water?

5/10

Q6.In the burning food investigation where you are trying to find out which food contains the most energy - which of these is not a control variable?

6/10

Q7.How do you calculate the temperature change?

7/10

Q8.What type of word should all steps of a method start with?

8/10

Q9.In the burning food investigation, what happens to the temperature of the water?

9/10

Q10.If the start temperature of some water is 40 °C and the final temperature is 100 °C, what is the temperature change?

10/10

Quiz:

# Energy in Food

This quiz will have questions from the lesson called 'Energy in Food' and previous lessons in the Energy topic. Please complete this quiz to consolidate your learning.

## Question 10

Q1.What does kcal stand for?

1/10

Q2.How many J in 45 kJ?

2/10

Q3.Which energy store is found in food?

3/10

Q4.In the burning food investigation where you are trying to find out which food contains the most energy - what is the independent variable?

4/10

Q5.In the burning food investigation where you are trying to find out which food contains the most energy - what piece of equipment is used to hold the water?

5/10

Q6.In the burning food investigation where you are trying to find out which food contains the most energy - which of these is not a control variable?

6/10

Q7.How do you calculate the temperature change?

7/10

Q8.What type of word should all steps of a method start with?

8/10

Q9.In the burning food investigation, what happens to the temperature of the water?

9/10

Q10.If the start temperature of some water is 40 °C and the final temperature is 100 °C, what is the temperature change?

10/10

# Lesson summary: Energy in food

### Time to move!

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For 5 mins...

Move around:
Jog

On the spot:
Chair yoga

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