Matter is made up of small particles called atoms. Atoms can exist on their own or together as molecules. Atoms are very small and around 100,000,000 of them end to end would measure one centimetre.
How do particles move in a substance in the solid state?
They vibrate about fixed positions
They move around, sliding over each other
They move randomly in all directions
In an experiment to find the specific heat capacity of a metal block, what can be done to reduce experimental error?
Heat the block up very slowly
Use a thermometer marking off every 2°C instead of every 1°C
Insulate the metal block to reduce heat escaping into the surroundings
What is the equation for density?
Mass × volume
Volume ÷ mass
Mass ÷ volume
What is the name of the change of state from gas to liquid?
The density of iron is 7.8 g/cm3, what is the mass of 5 cm3 of it?
What is a displacement can used for?
Measure volume of irregular solids
Measure mass of irregular solids
Measure mass of regular solids
What causes the pressure that a gas exerts?
Collisions with the particles on the walls of the container
The charge of the particles
The size of the particles
Which of these statements is always true?
A pure substance contains only one type of atom or molecule
A pure substance is healthy
A pure substance is expensive
How much energy is needed to raise the temperature of 500 g of lead by 10°C? (c = 129 J/kg°C)
How much energy is needed to turn 100 g of oxygen gas into a liquid at the same temperature? L = 213 kJ/kg