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Aim: To allow the students to have give their own opinion and feedback on the lesson. Also to give the students a sense of importance.

The students will be given time at the end of the lesson to give both positive and negative feedback on the lesson. They will answer questions orally in front of the class.

Time: 10 minutes

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Ice breaker:
https://www.youtube.com/watch?v=sM_uiHA3CEw

Sink or Float: https://www.youtube.com/watch?v=eQuW8G2QV_Q&t=248s

Density test:
https://www.scoilnet.ie/go-to-primary/theme-pages/science/kitchenchemistry/sink/

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Aim: To test the knowledge of the students by giving out an evaluation quiz sheet with questions on it around the topic of density.

Each student will complete the questions individually and will then confer their answers to see if they got the correct answers.
Time: 15 minutes
Resources: Printer

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Aim: To allow the students to go outside an get some fresh air to ensure better concentration levels when they return to the lesson.

The students can walk around the school and have a chat with their friends to have a break.

Time: 10 minutes.

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Aim: to help the students understand why certain liquids don't mix.

The students will watch the video carefully and try to understand how the experiment works. The students will then ask any questions they have and take notes.

Time: 10 minutes
Resources: scoilnet.ie, projector.

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This video shows how liquids can be used to show some principles of density in a very colourful way. It is designed to appeal to visual learners.

Methodology

Materials

A clear tall glass

A number of different liquids with different densities: Maple Syrup, Washing up Liquid, Water with Food Colouring, Cooking Oil

A number of solids with different densities: Cork, Blueberries and Cherry tomatoes.

Precautions

Students have to work diligently with the materials so that they don't mix when conducting the experiment.

Some of the materials will stain and none of the materials should be ingested.

Method

1. First pour the syrup into the glass slowly being careful not to get any on the sides (this is so we do not have to wait for the syrup on the side to reach the bottom of the glass)

2. Next pour in the washing up liquid Next pour in the coloured water by pouring it slowly down the side of the glass.

3. Finally add the cooking oil and allow the liquids to settle for a few minutes.

4. When the liquids have separated out, add the solids carefully, one by one. The most dense liquids and solid will be near the bottom and the least dense liquids and solids will be at the top.

Teacher Notes

Sink or swim works on the basis that liquids have different densities. Liquids/Solids/Gases with a low density float above those of higher density. Density is how much mass a material has, for a given volume. For example, if we consider the sugar content of two cans of coke (Coke and Diet Coke). For a given volume (same size can), there is more sugar in the coke liquid than in the diet coke liquid, making it more dense. When both cans are placed in a tank of water, the less dense can (Diet Coke) will float and the other (Coke) sink. Different densities means that when the liquids in the video are mixed, they will separate according to their density. This can be very simply shown with oil and water. The density of water is 1gm/cm3, whereas the density of oil is lower at 0.9gm/cm3. Thus the oil floats on water.

Extension Activities and Worksheets

Access to worksheets and extension activities are available in the teacher resource pack to Kitchen Chemistry.

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Official education portal of the Department of Education and Skills in Ireland. Curriculum focused resources and support for primary and post primary teachers.

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Aim: to help the students gain knowledge about density and to have the ability to test density.

The students will gather around a table and they will engage in the experiment by firstly adding the syrup into the glass, then the washing up liquid, the coloured water and finally the cooking oil before adding in each item in the video shown previous such as blueberries, tomato and a cork to test which item is the most dense.

Time: 15 minutes.
Resources: Glass, food colouring, oil, syrup, tomato, blueberries and a cork.

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Aim: To get the students to interact with each other and also to think about different materials that will sink or float.

The students will be in assigned groups and each group will receive a piece of paper with the words sink and float on it. Each group will get 10 pictures of items in which they will stick the images under whatever title they think is suitable to each item.

Time: 15 minutes
Resources: Paper, printer & blue tack.

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Aim: To help the students to understand why certain item sink or float in water.

The students will discuss with the teacher about the previous activity and will confer answers. The students will then watch a video about why things sink or float in water.

Timing: 15 minutes.
Resources: Discussion prompts, YouTube .

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Aim: To allow the students to get a better understanding of why different items float and why some sink.

There will be a large bowl filled 3/4 with water and the students will pick various items to put into the bowl to see if they will sink or float. They will record the results on a chart.

Timing: 20 minutes.
Resources : Bowl, various classroom items, water and paper.

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Aim: To introduce the session with an ice breaker activity to encourage the students to engage in the class.

The students will watch the video and try guess the answer for each question before the time is up.

Timing: 10 minutes.
Resources: YouTube
https://www.youtube.com/watch?v=sM_uiHA3CEw

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Can You Guess The Food By Emoji? | Riddles For Kids !

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Topic of discussion: Density.

Educational context: Primary school.

Target learners:  3rd class

Learning design approach: ABC approach.

Session learning outcomes:
1. Understand the meaning of density.
2. Recognise various items that float and sink in water.
3. Understand why different liquids don't mix.