# Which factors affect an object's ability to float?

In this lesson, we will be discussing upthrust (or buoyancy) in more detail. We will discuss what density is and how it affects floating. We will also discuss the link between weight and upthrust. Finally, we will make some predictions which we will test.

#### 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 of these is NOT an example of a non-contact force?

1/4

Q2.If a golf ball and a ping pong ball were to fall at the same time, which would hit the ground first?

2/4

Q3.Which of these is NOT a practical use for magnets discussed in our lesson?

3/4

Q4.What would it feel like if two different sides of a magnet are brought together?

4/4

#### 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 of these is NOT an example of a non-contact force?

1/4

Q2.If a golf ball and a ping pong ball were to fall at the same time, which would hit the ground first?

2/4

Q3.Which of these is NOT a practical use for magnets discussed in our lesson?

3/4

Q4.What would it feel like if two different sides of a magnet are brought together?

4/4

# 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:

# Which factors affect an object's ability to float?

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

Q1.Upthrust is also known as...

1/4

Q2.What would have a higher density?

2/4

Q3.If the upthrust is less than the weight of the object, the object will

3/4

Q4.If the upthrust is equal to the weight of the object, the object will...

4/4

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

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

# Which factors affect an object's ability to float?

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

Q1.Upthrust is also known as...

1/4

Q2.What would have a higher density?

2/4

Q3.If the upthrust is less than the weight of the object, the object will

3/4

Q4.If the upthrust is equal to the weight of the object, the object will...

4/4

# Lesson summary: Which factors affect an object's ability to float?

## Time to move!

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

For 5 mins...

Move around:
Jog

On the spot:
Dance