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Grade 9 term 4 test

Authored by Johané Koekemoer

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9th Grade

Used 1+ times

Grade 9 term 4 test
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20 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

An alloy is...

a metal combined with other materials; the properties of the metals are the same.

a metal combined with other materials; the properties of the metals are changed.

a non-metal combined with other materials; the properties of the metals are the same.

a metal combined with oxygen; the properties of the metals are the same.

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Ferric dioxide is the most common form of corrosion.

True

False

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Metals can be divided into two groups: ferrous metals (metals that do not contain iron) and non-ferrous metals (metals that contains iron).

True

False

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which one of the following metal preserving methods is the most commonly used?

Anodizing

Painting

Galvanizing

Electroplating

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Zinc is used in galvanising because...

it is resistant to corrosion

it is resistant to wear and tear

it is fire and water resistant

it is heat resistant

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which set of metals are most commonly used to electroplate jewelry?

Tin and copper

Platinum and silver

Tin, Chromium and Copper

Gold, platinum and Silver

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Media Image

State the type of food preservation method best suited for the food item shown in the picture:

pasteurisation

drying

pickling

salting

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