IGCSE Physics Review Year 10 - Sarah

What is Brownian motion?

• the movement of small particles suspended in a liquid or gas

• an electrical device made of two different metals

• when a wave spreads out as it travels through a gap or past the edge of an object

• electricity is generated when a coil moves near a magnet

Answer explanation

Arachibutyrophobia - the fear of peanut butter sticking to the roof of your mouth.

What are boiling points?

• the temperature at which a liquid turns into a gas

• the temperature at which a liquid turns into a solid

• the temperature at which a gas turns into a liquid

• the temperature at which a solid turns into a liquid

Answer explanation

Nomophobia - the fear of being without your mobile phone.

What happens when particles are heated?

• they gain kinetic energy and vibrate

• they dance aggressively

• they become dormant

• they decay

Answer explanation

Arithmophobia - fear of numbers.

Which word does this description match?: The law that relates the pressure and volume of a fixed mass of gas.

• Brownian motion

• Ohm’s law

• Boyle’s law

• Kinetic theory

Answer explanation

Xanthophobia - fear of the colour yellow.

What is temperature?

• energy being transferred in waves

• the total kinetic energy of all particles

• energy being transferred from a hotter place to a colder place

• the average kinetic energy of individual particles

Answer explanation

Plutophobia - fear of money.

How do you calibrate a thermometer?

• by putting it in ice water

• by putting it in boiling water

• by connecting it to a computer

• by putting it in warm water

Answer explanation

Ablutophobia - the fear of bathing.

Who created the first thermometer?

• Sir Isaac Newton

• Lisa Meitner

• Galileo Galilei

• Micheal Faraday

Answer explanation

Octophobia - the fear of the number eight.

What is specific heat capacity?

• how much heat energy a material can hold

• how much a material can hold

• how much energy required per unit mass to increase the temperature

• the energy needed to boil or melt a material

Answer explanation

Optophobia - fear of opening one’s eyes.

What is the formula for specific latent heat?

• Q=mL

• mcΔT

• e=mc²

• L=Q/m

Answer explanation

Hippopotomonstrosesquippedaliophobia - fear of long words. Ironically it’s the longest word in the dictionary.

What word does this description match?: The energy per kilogram required to cause a substance to change state from liquid to gas at its boiling point.

• latent heat

• specific latent heat of vaporisation

• specific latent heat of fusion

• heat capacity

Answer explanation

Ephebiphobia - fear of adolescents.