Science

The Universe- the story of everything

#Note: These lessons are designed to compliment the class topic for the term

Last Term's Science Work (below)

56 vid 1 Science Max Solids, Liquids and Gasses Full Episode_LqCsYwz8Q7s_360p.mp4

Solids, Liquids and Gases

Key Understandings:

1. Solids, liquids and gases behave in different ways and have observable properties that help to classify them

2. Changes to materials can be reversible, including melting, freezing, evaporating, or irreversible, including burning and rusting

Lesson 1: Insulation (Stopping the transferal of energy)

Introduction: Watch the video above or find it here- https://www.youtube.com/watch?v=LqCsYwz8Q7s

Investigation: Have a number of ice blocks- try to insulate each with a material of your choice- eg a jumper, tea towel, wrapped in newspaper, packing foam, inside a lunch box. Test 4 materials by wrapping each ice block at the same time and check on each every 2 minutes.

Use a timer and create a table with the following columns:

Material Time to Melt

Which worked best? Which was worst? Why do you think the results were like this?

Now try to use multiple materials, for example a tea towel inside a container. What did you notice about the melting time?

Please read more about insulators at: https://www.funkidslive.com/learn/curious-kate/curious-facts-insulation/#

Extra Investigation: If you have corn flour try mixing a little in a cup and test out the properties like you saw in the introduction video. Is the corn flour/water mix a solid or a liquid?

56 vid 2 Science for Kids_ Heat Energy Video_xGKg3TSO4v8_360p.mp4

Lesson 2: Transferal of Energy

Investigation: Now try to see how quick you can melt an ice block, use a timer and see which is quickest- in the sun, in a microwave, on a stone bench or a tile, on wood (like a chopping board), on plastic and in a hot cup of water. Note: you’ll need a timer like the one on the iPad. Create a Pages document and write the questions and your answers to the 'Melting Ice Student Sheet'. You'll be testing Plastic and Metal surfaces first. After completing this, create a table identical to the one underneath the 'Student Sheet'. Make sure it has all 8 situations listed. Then begin investigating with your timer!

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Which was the quickest? Why do you think one was quicker than the other?

More information on what you observed:

Ice is at a temperature of 0 °C; the surroundings are at about 20 °C.

For ice to melt, it must gain energy from the surroundings.

Energy can be transferred (move) from the surroundings to the ice by

conduction through the metal or plastic. Metal is a better conductor

than plastic, so energy is transferred more quickly through the metal.

This is why we saw the ice on the metal block melt more quickly.

(Note that a small amount of energy may enter the ice from the air,

but this is a small effect compared to conduction through the

metal/plastic because air has very little mass.)

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Check your answers to the above questions online.

Extra Investigation: Create a time lapse video of a block of ice, chocolate butter and a candle (if available) melting. Your iPad or an iPhone has this ability.

What did you observe?

What items can you return to a solid state? Try this out to see which you could get back to a solid.

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