Chapter 2

Question 1

Define hardness.

Answer 1

Ability to withstand scratches.

Question 2

Define strength.

Answer 2

Ability to withstand a heavy load without changing its shape permanently.

Question 3

Define flexibility.

Answer 3

Ability to bend without breaking and return to its initial size.

Question 4

Define Thermal conductivity.

Answer 4

Ability to conduct heat.

Question 5

Define Electrical conductivity.

Answer 5

Ability to conduct electricity.

Question 6

Define transparency.

Answer 6

Ability to allow light to pass through.

Question 7

Define density.

Answer 7

Ability to float or sink.

Question 8

How to determine the volume of an irregular object?

Answer 8

1. Fill a measuring cylinder with water & record initial reading.
2. Fully submerge the object in water & record the final reading.
3. Calculate the difference in both readings.
   (If the object floats)
4. Tie a string to the sinker & fully submerge it in water, before recording the reading.
5. Tie object to sinker & fully submerge them in water, before recording the reading.
6. Calculate the difference in both readings.

Question 9

Formula to find density.

Answer 9

Density = mass/volume

Question 10

What instrument is used to measure the mass of objects?

Answer 10

Electronic balance.