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Science at Home

Total questions: 20

Worksheet time: 18mins

Name
Class
Date
1.

Is it acid or alkali when the pH is 4 pH

a)

Acid

b)

Alkali

c)

Neutral

2.

What is the pH of distilled water?

a)

pH 12

b)

pH 3

c)

pH 8

d)

pH 7

3.

A wasp sting is alkali. Which substance would neutralise the sting?

a)

Vinegar

b)

Bleach

c)

Baking soda

d)

Distilled water

4.

Which pH levels indicated a strong acid?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

5.

Which pH level indicates a weak alkali?

a)

1-3

b)

4-6

c)

8-11

d)

12-14

6.
Name the separation method that causes wet clothes on a clothes line to dry
a)
Chromatography
b)
Filtration
c)
Distillation
d)
Evaporation
7.

How can we separate an insoluble solid from a liquid?

a)

chromatography

b)

evaporation

c)

filtration

d)

condensation

8.

Which one of the following is the name for separation technique in the picture below

a)

distillation

b)

filtration

c)

evaporation

d)

chromatography

9.
A combination that can be separated by physical processes is a .....
a)
Pure Substance
b)
Glucose
c)
Element
d)
Mixture
10.
Which is a pure substance?
a)
Steam
b)
Sea Water
c)
Soil
d)
Lemonade
11.
What is the transfer of heat by movement of liquids or gases?
a)
conduction
b)
convection
c)
radiation
12.

What is a transfer of heat energy by electromagnetic waves through space?

a)

conduction

b)

convection

c)

radiation

13.
You buy a lava lamp from the store. As the lamp heats up, blobs of liquid rise to the top then sink back down to the bottom. This process continues because of _?_.
a)
conduction
b)
convection
c)
radiation
14.
What happens when ice cubes melt in a glass?
a)
Heat travels from the ice to the warmer water.
b)
No energy is transferred.
c)
Heat is transferred from the warmer water to the ice cubes.
15.
Where does most of the energy go in this transformation.
a)
Electrical energy
b)
Light
c)
Heat
d)
other
16.
A material that transfers energy easily.
a)
insulator
b)
heat
c)
conduction
d)
conductor
17.
What type of device might this Sankey be about?
a)
A very efficient LED light bulb
b)
A very inefficient incandescent light bulb
c)
A coal power plant
d)
A wind turbine
18.
What units are used to measure energy?
a)
Watts
b)
Newtons
c)
Joules
d)
kilowatts
19.

A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?

a)

5%

b)

50%

c)

55%

d)

100%

20.
Which of these is the correct spelling?
a)
newtralisation
b)
neutralisation
c)
neutrailsaton
d)
newtraleyesashon

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