SCIENCE 3 UNIT 7 "MATTER, MATERIALS AND MIXTURES" - ACTIVITIES

SCIENCE 3

UNIT 7

MATTER, MATERIALS AND MIXTURES

La Ñora, Wednesday April 29th 2015.

Page 97.

1^st Identify a liquid, a solid and a gas in the picture.

LIQUIDS: water, drinks

SOLIDS: metals, plastic, glass, cardboard, paper, clothes, wood, fabric, rubber

GASES: butane, propane, methane, air, oxygen, carbon dioxide, nitrogen, water vapour, natural gas

2^nd Name some different materials you can see in the picture.

Metal, plastic, glass, cardboard, paper, wood, fabric, rubber.

3^rd How many flexible materials can you see?

Plastic, rubber, cardboard, paper, wood and fabric are flexible.

Metals like aluminum are flexible.

Metals like steel are not flexible. They are rigid.

4^th Which materials in the picture do you recycle?

Metal and plastic à yellow bin

glass à green bin

cardboard and paper à blue bin

fabric à white bin

Page 98.

2^nd Look at the story. Write one or two words to complete the sentences.

1. Alex and Carla are on a school trip to a recycling plant.

2. A glass bottle is smooth and rigid, but it is also fragile.

3. A wooden pallet is rough, rigid and resistant.

4. One side of a kitchen sponge is absorbent and the other side is rough.

5. A plastic bottle is waterproof, flexible and smooth.

Page 99.

1^st Copy the project in your notebook. Add two more objects and the words to describe them.

cardboard box à smooth, resistant, flexible

food tins, food cans à smooth, resistant, waterproof

Page 100.

3^rd What reaction occurs when we burn paper? And when rust forms on metal?

When we burn paper, there is a reaction called combustion.

When rust forms on metal there is a reaction called oxidation.

Page 102.

2^nd Put the following mixtures into two groups: sea water, muesli, milkshake, paint, fruit cake.

We can see the different materials	We can’t see the different materials
muesli fruit cake	sea water milkshake paint

3^rd Which separation method do you think is best for separating sand and water? What about sand and pebbles?

Filtering for separating sand and water.

Sieving for separating sand and pebbles.

Page 103.

5^th What is the person in this photo doing? Explain why they are using this method of separation.

He is sieving for gold.

They are using this method of separation because it is good for separating solids of different sizes.

Page 104.

1^st Write a definition for natural materials and manufactured materials.

Natural materials are the ones that come from living things or from the ground.

Manufactured materials are the ones that are processed from natural materials or chemicals.

2^nd What do we use wood, cotton and feathers for? Make a list.

WOOD: pieces of furniture: tables, chairs; and doors, windows, and paper…

COTTON: clothes.

FEATHERS: coats, quilts, pillows and feather duster.

Page 108.

1^st Copy and complete.

1. rough / smooth

2. resistant / fragile

3. rigid / flexible

4. waterproof / absorbent

1. We can see

2. We can’t see

1. shape, size or state

2. into other matter

1. natural

2. manufactured

Page 109.

1^st Copy and complete the sentences.

a. Matter has three different states. It can be a gas, a liquid or a solid.

b. When water changes from a solid to a liquid, it is a physical change.

c. Combustion and oxidation are chemical changes.

d. A mixture is something that contains different materials.

e. Sieving, filtering and evaporating are methods of separating materials in a mixture.

2^nd Look at the pictures. Describe what you see. Think about everything we have studied in this unit.

1) Combustion is a chemical reaction.

2) One side of a kitchen sponge is absorbent and the other side is rough.

3) When you add sugar to your tea you can’t see the different materials.