# Review combined

This lesson will review the Combined Science content of this unit.

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 5

Q1.What is the minimum amount of energy needed to start a reaction called?

1/5

Q2.What is the unit for bond energy values?

2/5

Q3.If the overall energy change is negative, what type of reaction is it?

3/5

Q4.During a reaction, 2462 kJ/mol of energy is needed to break bonds and 1363 kJ/mol of energy is released when bonds are made. What type of reaction is it?

4/5

Q5.During a reaction 988 kJ/mol of energy is needed to break bonds and 1892 kJ/mol of energy is released when bond are made. What type of reaction is it?

5/5

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 5

Q1.What is the minimum amount of energy needed to start a reaction called?

1/5

Q2.What is the unit for bond energy values?

2/5

Q3.If the overall energy change is negative, what type of reaction is it?

3/5

Q4.During a reaction, 2462 kJ/mol of energy is needed to break bonds and 1363 kJ/mol of energy is released when bonds are made. What type of reaction is it?

4/5

Q5.During a reaction 988 kJ/mol of energy is needed to break bonds and 1892 kJ/mol of energy is released when bond are made. What type of reaction is it?

5/5

# 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:

# Review Lesson

This quiz will assess your knowledge from this lesson and previous lessons

## Question 5

Q1.Chemical reactions involve bond breaking and bond making. Where are bonds broken?

1/5

Q2.What is the minimum amount of energy needed to start a reaction?

2/5

Q3.What type of reaction does this energy level diagram represent?

3/5

Q4.A reaction is overall endothermic because...

4/5

Q5.To break a C-C bond it requires 348 kJ/mol of energy, how much energy is released when a C-C bond is made?

5/5

Quiz:

# Review Lesson

This quiz will assess your knowledge from this lesson and previous lessons

## Question 5

Q1.Chemical reactions involve bond breaking and bond making. Where are bonds broken?

1/5

Q2.What is the minimum amount of energy needed to start a reaction?

2/5

Q3.What type of reaction does this energy level diagram represent?

3/5

Q4.A reaction is overall endothermic because...

4/5

Q5.To break a C-C bond it requires 348 kJ/mol of energy, how much energy is released when a C-C bond is made?

5/5

# Lesson summary: Review combined

### 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

### Take part in The Big Ask.

The Children's Commissioner for England wants to know what matters to young people.