# Measuring time in seconds

In this lesson, we will estimate the time it takes to do certain tasks, and then time them using time measuring tools such as stopwatches. We will then compare our estimate with our results to help us determine how long a second is in real 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 of these did not show on Mrs Behan's stopwatch?

1/5

Q2.If Mrs Behan could say 'elephant' 23 times in 20 seconds, roughly how many times could she say 'elephant' in one minute?

2/5

Q3.Which unit of measurement would you choose if you took a flight to China?

3/5

Q4.Would you use a clock or a stopwatch to measure the time it took you to do a lap of a running track?

4/5

Q5.Which unit of measurement would you use to time brushing your teeth?

5/5

#### 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 did not show on Mrs Behan's stopwatch?

1/5

Q2.If Mrs Behan could say 'elephant' 23 times in 20 seconds, roughly how many times could she say 'elephant' in one minute?

2/5

Q3.Which unit of measurement would you choose if you took a flight to China?

3/5

Q4.Would you use a clock or a stopwatch to measure the time it took you to do a lap of a running track?

4/5

Q5.Which unit of measurement would you use to time brushing your teeth?

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.

# Lesson summary: Measuring time in seconds

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Chair yoga