# Estimating Populations

This lesson follows on from the previous lesson by completing frequency tables, calculating areas of compound shapes and estimating populations of organisms.

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.What is the definition of population?

1/8

Q2.What is the name of the piece of equipment in the image?

2/8

Q3.How do you ensure that the quadrat is placed randomly?

3/8

Q4.Which TWO ways would increase accuracy when using quadrats to count the number of plants?

Select two (2) boxes

4/8

Q5.Which of the following is the best method step?

5/8

Q6.The diagram shows the lawn with the positions of the flowers and the students’ 10 quadrats. What is the total number of flowers found in all 10 quadrats?

6/8

Q7.What was the total number of ragwort plants in 10 quadrats?

7/8

Q8.What was the mean number of ragwort plants in 1m²?

8/8

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.What is the definition of population?

1/8

Q2.What is the name of the piece of equipment in the image?

2/8

Q3.How do you ensure that the quadrat is placed randomly?

3/8

Q4.Which TWO ways would increase accuracy when using quadrats to count the number of plants?

Select two (2) boxes

4/8

Q5.Which of the following is the best method step?

5/8

Q6.The diagram shows the lawn with the positions of the flowers and the students’ 10 quadrats. What is the total number of flowers found in all 10 quadrats?

6/8

Q7.What was the total number of ragwort plants in 10 quadrats?

7/8

Q8.What was the mean number of ragwort plants in 1m²?

8/8

# 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:

# Estimating Populations

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

Q1.Some students wanted to find the number of thistle plants growing on a lawn. Which method should the students use to decide where to place the quadrats?

1/5

Q2.Which is the correct method for calculating area of an compound shape?

2/5

Q3.Calculate the area of the field.

3/5

Q4.The mean number of plants in a 1m x 1m quadrat is 1.5. The lawn measured 12 metres long and 10 metres wide. Estimated the number of plants on the lawn.

4/5

Q5.The field measured 40 m by 145 m.The students used 0.25 m² quadrats. The students found a mean of 0.42 dandelions per quadrat. Estimate the population of dandelions on the field.

5/5

Quiz:

# Estimating Populations

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

Q1.Some students wanted to find the number of thistle plants growing on a lawn. Which method should the students use to decide where to place the quadrats?

1/5

Q2.Which is the correct method for calculating area of an compound shape?

2/5

Q3.Calculate the area of the field.

3/5

Q4.The mean number of plants in a 1m x 1m quadrat is 1.5. The lawn measured 12 metres long and 10 metres wide. Estimated the number of plants on the lawn.

4/5

Q5.The field measured 40 m by 145 m.The students used 0.25 m² quadrats. The students found a mean of 0.42 dandelions per quadrat. Estimate the population of dandelions on the field.

5/5

# Lesson summary: Estimating Populations

## 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