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Yr 8 Chemical Reactions

Total questions: 25

Worksheet time: 30mins

Name
Class
Date
1.
A candle wick burning is an example of a _________________________
a)
physical reaction
b)
condensation
c)
neutrons
d)
chemical reaction
2.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
3.
When a candle melts, it is a ___________________  change.
a)
chemical
b)
physical
c)
transparent
d)
undefined
4.

Which of the following IS a physical change?

a)

Getting a haircut

b)

Rusty metal

c)

A compound

d)

sour milk

5.

Which of the following 2 are chemical reactions?

a)

sugar dissolving in water

b)

water turning into steam

c)

burning wood

d)

mixing baking soda and vinegar

e)

tearing paper

6.

How many Carbons are present on the reactant side?

a)

1

b)

2

c)

3

d)

4

7.

How many Hydrogens are on the product side of this chemical equation?

a)

1

b)

2

c)

3

d)

4

8.

How many Oxygens are on the product side of this chemical equation?

a)

1

b)

2

c)

3

d)

4

9.

Which characteristic of a substance is considered a chemical property?

a)

its boiling point

b)

its reactivity

c)

its density

d)

its conductivity

10.

Which event always involves a chemical change?

a)

boiling

b)

melting

c)

conducting

d)

burning

11.

Which is an example of a chemical change?

a)

frying an egg

b)

boiling water

c)

melting butter

d)

chopping onions

12.

Flammability is the ability of a substance to _________

a)

Burn

b)

Transfer heat

c)

Transfer electricity

d)

Cook

13.
What car brand is this?
a)
Honda
b)
Skoda
c)
Aston Martin
d)
Mollos
14.
What car brand is this?
a)
Citroen
b)
Molazio
c)
Tesla
d)
Honda
15.

How many sides are on a standard #2 pencil?

a)

4

b)

5

c)

6

d)

7

16.

 33 = 3^{3\ }=\   

a)

9

b)

18

c)

27

d)

36

17.

Which fast food chain uses the slogan "I'm lovin' it"?

a)
b)
c)
d)
18.
The left side of the equation below is called
a)
Products
b)
Reactants
19.
The right side of the equation below is called the
a)
products
b)
reactants
20.
Which statement is not a description of a chemical reaction?
a)
A solid is dropped into a beaker of liquid and a gas is released.
b)
Two liquids are mixed in a beaker and a solid forms at the bottom of the beaker.
c)
A solid is dropped into a beaker of liquid and an explosion occurs.
d)
A liquid is heated in the sun and half of it evaporates.
21.
Which of the following is NOT a sign of a chemical reaction? 
a)
Color changes
b)
Cutting into fourths
c)
Light is produced
d)
Gas is formed
22.

What’s this?

a)

Temple of Borobudur

b)

Taj Mahal

c)

Sphinx of Giza

d)

Forbidden City

23.
a)

Temple of Borobudur

b)

St. Basils Catheadral

c)

Stonehenge

d)

Mount Rushmore

24.

What’s this?

a)

Statue of Liberty

b)

Mount of Rushmore

c)

Christ the Redeemer

d)

Big Ben

25.

What’s this?

a)

Temple of Borobudur

b)

St. Basils Catheadral

c)

The Great Wall

d)

Mount Rushmore

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