P3 - Particle Model of Matter

Question 1

What does compacting an object do to its density?

Answer 1

Increase it

Question 2

How can you find the density of a solid?

Answer 2

Water displacement practical, and use measurements in the equation

Question 3

How can you find the density of a liquid?

Answer 3

Measure using a cylinder and then use equation.

Question 4

Why is mass conserved during a change of state?

Answer 4

Only the particle arrangement changes.

Question 5

What is internal energy?

Answer 5

Energy stored inside a system in the atoms and molecules.

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

Question 6

What is the specific latent heat?

Answer 6

The energy needed to change to state of 1kg of a substance, without changing its temperature.

Question 7

How do particles in a gas move?

Answer 7

Randomly and constantly

Question 8

What is work?

Answer 8

Transfer of energy by a force.

Question 9

How does doing work on a gas increase its temperature?

Answer 9

Doing work decreases volume, and decreased volume leads to higher pressure and more frequent collisions.