Physic

Question 1

Describe the arrangement and motion of particles in a solid

Answer 1

Particles are closely packed in a regular arrangement. The particles vibrate about a fixed position.

Question 2

Describe the arrangement and motion of particles in a liquid

Answer 2

The particles are closely packed in a random arrangement. The particles can move around each other.

Question 3

Describe the arrangement and motion of particles in a gas

Answer 3

The particles are far apart, their motion is random and independent of the other particles.

Question 4

What is the name of the change of state when a solid turns directly into a gas? What is the reverse called?

Answer 4

Sublimation and Deposition

Question 5

Which state of matter is generally the most dense?

Answer 5

Solids

Question 6

Give an example where this generalisation does not hold true

Answer 6

Liquid water is more dense than solid water (ice)

Question 7

When do objects sink in water

Answer 7

If they are more dense than water (their density is greater than 1000kg/m3)

Question 8

How do you measure the volume of an irregular object?

Answer 8

-Fill a eureka can with water
-Submerge the object in the water and measure the volume of displaced water with a measuring cylinder

Question 9

How do you measure the density of a regular object?

Answer 9

-Using a ruler to find the dimensions
-calculate the volume
-measure mass using a balance
-calculate density (mass/volume)

Question 10

What is a physical change?

Answer 10

A change which is reversible, for example a change of state where no new substances are formed.