How do the particles in a solid move?
Randomly in all directions
They roll over each other
They vibrate around a fixed point
What is the equation for density?
Mass × volume
Volume ÷ mass
Mass ÷ volume
The density of iron is 7.8 g/cm3. What is the mass of 5 cm3 of iron?
1.56 g
0.64 g
39 g
What is the density of a rock if it has a mass of 1,500 kg and a volume of 0.5 m3?
750 kg/m3
3,000 kg/m3
7,500 kg/m3
What is the mass of 15 cm3 of a substance that has a density of 50 g/cm3?
750 g
0.3 g
3.33 g
How much energy is needed to raise the temperature of 500 g of lead by 10°C? (c = 129 J/kg°C)
129 J
500 J
645 J
What process occurs when a liquid absorbs energy gradually from its environment to change into a gas?
Evaporation
Boiling
Condensation
Which part of a cooling curve shows the changes of state?
The steepest lines
The horizontal lines
The vertical lines
How much energy is needed to turn 100 g of oxygen gas into a liquid at the same temperature? L = 213,000 J/kg
21.3 J
21,300 J
213,000 J
How much energy does a kilogram of molten lead emit as it freezes if its latent heat of fusion is 22,400 J/kg?
4,200 J
22,400 J
334,000 J