Particle model of matter - Paper 1

Question 1

What is density? How do we calculate it?

Answer 1

The mass of a given volume of a material.
density (kg/m^3) = mass (kg) / volume (m^3)

Question 2

Regular objects have _____ which are ______.

Answer 2

dimensions, easy to measure

Question 3

We ______ the dimensions of an irregular object.

Answer 3

cannot easily measure

Question 4

(Required Practical) How do we calculate the density of a regular object?

Answer 4

Measure mass using a scale / balance.
Measure sides (e.g. by using a ruler)
Multiply L x W x H to get volume
density = mass / volume

Question 5

(Required Practical) How do we calculate the density of an irregular object?

Answer 5

Measure mass using a scale / balance
Fill eureka can with water
Place measuring cylinder under eureka can
Place object in eureka can
Measure amount of water displaced in the measuring cylinder (volume)
density = mass / volume

Question 6

What is internal energy?

Answer 6

The total kinetic and potential energy of all the particles in a system

Question 7

All particles have _____ and _____ energy

Answer 7

kinetic, potential

Question 8

What is it called when a solid turns directly into a gas?

Answer 8

sublimation