Grade 5

Natural Science and Technology

31 August 2020- 7 September 2020

General Instructions: Please make sure to do the correct days’

work on the day indicated. On the learner’s off day, a revision

activity needs to be completed (Added to the weeks work- as

provided below per date. The content will be completed over a 10

day cycle)

Natural Science and Technology 5A

Always write the date provided on each day

Write the Heading

Underline

Include page numbers

Everything must be done in your writing books

NB: Please make sure to do the correct days’ work on the day

indicated. On the learner’s off day, a revision activity needs to be

completed (Added to the weeks work- as provided below per date.

The content will be completed over a 10 day cycle)

Monday 31 August 2020 (Group 1) + Tuesday 1 September

2020(Group 2)

Term 2 –Chapter 1- Metals and Non-metals ( Heading)

Pg.122-133 ( Read)

Revise Chapter 1:Answer the following questions:

1. What is a metal?

2. List 5 metals and 5 non-metals.

3. How can you identify metals and non-metals?

4. How do we decide what materials to use when we want to

build or make something?

Complete the worksheet: Fill in the table. Give examples of metals

and non-metals in the blocks provided.

Wednesday 2 September (Group 1) – Thursday 3 September 2020

(Group 2)

Write : The properties of metals ( Heading)

• Lustrous (shiny)

• Good conductors of heat and electricity.

• High melting point.

• High density (heavy for their size)

• Malleable (can be hammered)

• Ductile (can be drawn into wires)

• Usually solid at room temperature (an exception is mercury)

• Opaque as a thin sheet (can't see through metals)

Activity 1- Investigate and compare the properties of metals and non-metal objects

You will need copper, wire , coins, nails, cooking pots , metal knives and forks , chalk , stones , sand and a piece of coal. You may add some of your own examples.

Copy this table:

Example shiny dull hard soft strong weak

Copper wire

Coin

Nail

Cooking pot

Knife

Fork

Chalk

Stone

Sand

coal

Investigate each object to find out if it is shiny or dull, hard or soft, strong or weak. Observe and compare them. Use a in your table to record the properties of each.

Friday 4 September (Group 1) – Monday 7 September (Group 2)

Metals and non-metals ( heading)

Answer the following questions:

1. Are there non-metals that are hard and strong?

2. Are there non-metals that are shiny?

3. Are there metals that are not shiny?

Exercise 1- Write a paragraph to describe how you could make an

old and dull metal object shiny again.

MORE PROPERTIES OF METALS ( Heading)

Write: Metals are also malleable. What does it mean?

Metals are ductile. What does it mean?

Exercise – Look at the graph showing melting point (temperature

at which something melts.

Complete the following questions:

1. Which metal needs the most energy in order to melt?

2. Which metal melts at the lowest temperature?

3. You can melt lead in a copper spoon over a candle flame. Why

does the copper spoon not melt?

0

200

400

600

800

1000

1200

1400

1600

1800

gold 1064 iron 1538 copper 1085 lead 327.5 silver 961.8

Tuesday 8 September (Group 1) – Wednesday 9 September

(Group 2)

Write: Properties of non-metals( Heading)

• Poor thermal conductors • Poor electrical conductors • Brittle solids—not malleable or ductile • Little or no metallic lustre • Gain electrons easily • Dull, not metallic-shiny, although they may be colourful

• Lower melting points and boiling point than the metals

Exercise 1

1. Are all solid non-metals dull and brittle?

2. What properties do nylon fabric and cotton fabric share?

3. What properties of the two fabrics are different?

Exercise 2

1. Choose one example of an object made from a non-metal.

Write at least two properties of the non-metal.

2. Write two or three sentences to explain why the object is made

from this non-metal.

Exercise 3

Look at the following pictures and answer the questions that

follow.

1. Stainless steel spoon

2. Plastic spoon

3. Wooden spoon

4. Gold coin

5. Gold earrings

6. Plastic earrings

7. Porcelain cup

8. Tin cup

9. Glass cup

10. Plastic cup

1. Which objects are non-metals?

2. Which non-metals are brittle and will break easily if you drop

them?

3. Which objects are made from metals?

4. What are the properties of these objects?

Friday 4 September (Group 1) – Monday 7 September (Group 2)

More properties of metals( Heading)

Write down :

1. Metals conduct(Transfer or carry)

2. Some metals are magnetic and some are not

3. Only iron rusts but some metals tarnish or become dull.

Write: Metals conduct heat: Some materials are good conductors

of heat. Heat energy travels through them easily. Other materials

do not transfer heat energy so they are not good conductors.

Exercise 1: Write answers in your book

Questions

1. Some homes are made from corrugated iron. What will these

homes be like in summer? Explain your answer.

2. Why is the handle of a cooking pot usually made from plastic or

wood?

Write: We have seen that metals are good conductors of heat.

This property can be useful if we want to make something that

conducts heat, such as a pot or pan. This property is not useful if

we are trying to stop heat energy from being conducted. Some

metals are magnetic and some are not. - Magnets can pull certain

things towards them. We say that the magnet attracts them. When

a material is attracted to a magnet, we say it is magnetic.

Tuesday 8 September (Group 1) - Wednesday 9 September (Group

2)

Exercise 1

Answer the following questions:

1. Some homes are made from corrugated iron. What will these

homes be like in summer?

2. Why is the handle of a cooking pot usually made from plastic

or wood?

Write: Some metals are magnetic and others are not. Magnets can

pull things towards them. We say that the magnet attracts them.

When a material is attracted to a magnet, we say it is magnetic.

Exercise 2

To Be Completed at home: Practical Task Below

Thursday 10 September – Friday 11 September

Are all metals magnetic? ( Heading)

Write: Magnetic power drives some hairdryers. Some trains are

driven by magnetic power. Magnets make it possible for television

sets and radios to produce sound. Computers use magnets to

store information. Homing pigeons can find their way home

because we believe that they use earth’s magnetism to sense

direction, much like a compass. An electromagnet uses electricity

to become magnetic. When the electricity is switched on, iron and

steel stick to the electromagnet. A crane with a powerful

electromagnet can lift up scrap iron and steel from a scrap heap.

Iron, as well as iron alloys, rusts because of a chemical reaction

known as oxidation. When iron is exposed to moisture or oxygen,

oxidation occurs. During this chemical reaction, iron is converted

into iron oxide. The iron oxide typically has a reddish, flaky

appearance that becomes progressively worse over time.

Why is rust bad for metals?

It makes them look orange and rough. It makes them weaker,

by replacing the strong iron or steel with flaky powder. Some

oxides on some metals such as aluminium form just a thin

layer on top which slows down further corrosion, but rust can

slowly eat away at even the biggest piece of iron