Hello guys,

here we have some activities for this week.

- A worksheet : health 2

- Book page 76 Let's revise Activities 1, 3 and 5.

See you soon!!

Regards

Morning,

let´s go over the Unit 3 to double check what we have learnt.

To do so, let´s do this worksheet.

Health 1

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Properties of matter

Matter has three properties

1- Volume

Is the amount of space that matter occupies.

The unit of measurement for volume is cubic centimetres (cm3)

2- Mass

Is the amount of matter in an object.

The unit of measurement for mass is grams and kilograms.

3- Density

Is the amount of mass that there is in the volume of an object.

To find out the density of an object, we divide its mass by its volume.

Finding the mas and volume of a stone

We can use scales to find out the mass of a stone.

We can use a measuring jug and water to find out the volume of a stone

Activities

1- Answer these questions.

- Which property of matter can you measure with a jug of water?

- Which property of matter can you measure with scales?

- What do we need to know to measure density?

THE PROPERTIES OF MATERIALS

Different materials have different properties. They can be classified by:

• Physical properties
• Solubility
• Thermal conductivity

Physical properties

• Hard or soft

 
Hard materials are very difficult to scratch or cut easily like diamonds.

In contrast, soft materials are scratched or cut easily.

• Tough or fragile

Tough materials are very difficult to break like steel.

In contrast, fragile materials break easily.

• Plastic or elastic

Plastic materials are easy to bend.

In constant, elastic materials go back to their shape after we squash or stretch them.

Solubility

Solubility describes if a material can dissolve in water.

Materials that dissolves are soluble and that don't dissolve are insoluble.

When you put salt in water and stir it, the salt dissolves. Salt is soluble.

When you put pepper in water and stir, the pepper doesn´t dissolve. Pepper is insoluble.

Thermal conductivity

Thermal conductivity describes if a material can get very hot.

Materials that can get hot are thermal conductors like metal. As such, the metal gets very hot so you can iron your clothes. The plastic doesn’t get hot so you can hold the iron.

Materials that don’t get hot are thermal insulators like plastic and wood. Pans are made of metal so they can get very hot and cook food. Spatulas are made of wood or plastic so they don’t get hot and you can hold them.

Activities

1. Read and find out

Three basic ways materials can be classified
An example of each

 
2. Find the correct sentence. In your notebook, correct the wrong ones.

A thermal conductor never gets hot
Plastic and wood are thermal insulators
Salt is insoluble in water
Metal is hard and fragile
Plastic materials are difficult to bend

We start a new unit, the unit 4 “Matter”.

Read page 62 and 63.

Copy the chart on page 62 related to Objectives.

Do activities 1 and 3 on page 63.

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Now that we have almost finished the unit, it's time to go over and revise what we have learnt.

Go to page 40 and do activity 1 and 2 on your notebook.

Take care!

Today guys you have to do activity 3 on page 40 and activity 6 on page 41.

Hope everything's is alright.

Take care!