Y9 Physics Test - Spring 1

Question 1

Characteristics of a solid

Answer 1

Particles are always touching each other, fixed position, can only vibrate, neat, uniform rows, fixed shape & volume, held together by strong, intermolecular forces

Question 2

Characteristics of a liquid

Answer 2

Particles in liquid always moving & touching, moves around randomly, cannot predict particles, known as fluids, cannot compress liquids (fixed volume), held together by weak intermolecular forces

Question 3

Characteristics of a gas

Answer 3

Also a fluid, like a liquid, particles always moving in random directions, not touching, can compress, always fills its container, little to no intermolecular forces

Question 4

Equation for density

Answer 4

ρ = m/V (kg & m^3 or g & cm^3)

Question 5

Equation for pressure

Answer 5

P = F/A (N & m^2)

Question 6

Equation for latent heat

Answer 6

E = mL (J & kg)

Question 7

What is latent heat?

Answer 7

Heat needed to make a substance change state. The heat is needed to overcome forces of attraction.

Question 8

What is latent heat of vaporisation?

Answer 8

Energy needed to change 1kg of a substance from a liquid to a gas.

Question 9

What is the latent heat of fusion?

Answer 9

Energy needed to change the state of 1kg of a substance from a solid to a liquid.