Shelfield Year 9 Physics Quizizz

What did J.J.Thomson discover?

• Neutrons

• Protons

• Atoms

• Electrons

Why do models of the atom change over time?

• When there is new evidence that disproves older models

• Because they fancy a change

• The atom changes all of the time

• Different scientists disagree so change them

Whose model of the atom is this?

What is the average diameter of an atom?

• 1 x 10^-12m

• 1 x 10^-10m

• 1 x 10^-14m

• 0.001m

Which two of these equations are correct for calculating density?

• Density = mass  $\div$  volume

• Mass = Density x volume

• Density = Mass x volume

• Volume = Density x mass

Which state of matter usually has the highest density?

• Solid

• Liquid

• Gas

• They are all the same

What are the units of temperature?

What is the definition of specific heat capacity?

• The specific heat capacity is the heat energy that is needed to raise the temperature of 1 kg of a substance by 1^oC .

• The specific heat capacity is the heat energy that is needed to change the state of 1 kg of a substance.

• The specific heat capacity is the heat energy that is needed to raise the temperature of 1 g of a substance by 10^oC .

• The specific heat capacity is the heat energy that is needed to change the state of 1 g of a substance.

What do we call the change of state between a solid and a gas?

What happens to the temperature of ice as it melts?

• It goes up

• It goes down

• It stays the same