IGCSE Global Revision Concepts Physics U1-6

Why is energy lost when a car moves?

• friction

• elasticity

• momentum

• power

When energy is wasted, what energy is it most often converted to?

• light

• sound

• heat

• movement

How do I calculate the distance covered from a velocity graph?

• the gradient of velocity

• the area over the graph

• the area under the graph

• the slope of the graph

What is the difference between a gas and a liquid?

• molecules in gases are more separate, and have more energy

• molecules in gases are closer, and have more energy

• molecules in gases are more closer, and have less energy

• molecules in gases are more separate, and have less energy

Which can be compressed, a liquid or a gas?

• liquid, because forces are weaker

• gas, because forces are weaker

• both, , because forces are weak

• none, because forces are strong

How do molecules of gases move when they cool down?

• they don´t move

• faster

• sideways

• slower

What are the particles of a solid like?

• fixed, in patterns, far apart

• they move, in patterns, close together

• fixed, in patterns, close together

• fixed, ordered randomly, close together

What is energy used for when melting a substance?

• energy is used to create bonds

• energy is used to break bonds

• for nothing

• energy is used to freeze the bonds

What characteristics of the wave are volume and pitch?

• volume is the opposite of amplitude and pitch is wavelength

• volume is the opposite of amplitude and pitch is the opposite of wavelength

• volume is the opposite of wavelength and pitch is amplitude

• volume is amplitude and pitch is the opposite of wavelength

What is the speed of sound in air?

• 3.3m/s

• 33m/s

• 330m/s

• 3300m/s