Middle School: 6th, 7th and 8th Grade - Science - Changing Materials Solution - MCQGeeks.com

Q.1.

If you were burning a candle, which of the following would be a reversible change?

0%
The solid candle wax melts
0%
The liquid wax in the wick burns
0%
The flame produces smoke
0%
All of the above

Q.2.

Which of the following is an example of a reversible change?

0%
A puddle turns to ice on a very cold winter's day
0%
Sugar is dissolved in hot water
0%
An egg is fried in a hot pan
0%
A bar of chocolate has been left in the sunshine and has melted

Q.3.

Which of the following is a sign of an irreversible change taking place?

0%
A change in color
0%
A sudden change in temperature
0%
Vigorous bubbling
0%
All of the above

Q.4.

Which of these mixtures is an irreversible change?

0%
PVA glue mixed with Borax
0%
Mixing salt and water
0%
Plaster of Paris mixed with water
0%
Bicarbonate of soda mixed with vinegar

Q.5.

Burning will produce what sort of change?

0%
An irreversible change
0%
A reversible change
0%
Either a reversible or an irreversible change
0%
Neither a reversible or irreversible change

Q.6.

Which of the following is an example of a reversible change?

0%
Evaporation but not condensation
0%
Condensation but not evaporation
0%
Combustion
0%
Evaporation and condensation

Q.7.

Heating will produce what sort of change?

0%
An irreversible change
0%
A reversible change
0%
Either a reversible or irreversible change
0%
Neither a reversible or irreversible change

Q.8.

Which of the following is an example of an irreversible change?

0%
A log of wood has been burned on the fire
0%
A fruit smoothie has been frozen to make lollies
0%
A mixture of flour, water and yeast has been baked into bread
0%
A bicycle left out in the rain begins to rust

Q.9.

What is a reversible change?

0%
A material changes permanently into a new material
0%
A material changes its feel or appearance, but it is still the same material
0%
A material changes into a new material, but it can be changed back
0%
A material stops existing

Q.10.

What is an irreversible change?

0%
A material changes permanently into a new material
0%
A material changes its feel or appearance, but it is still the same material
0%
A material changes into a new material, but it can be changed back
0%
A material stops existing