6.3 Density Flashcards
What are some physical properties of substances?
The appearance
The temperature at which it melts, freezes and boils
It’s hardness (how easy it is to scratch the material)
What does density depend on?
It depends on how heavy a substance is but not the same weight/mass. It measures ow much matter is packed into a space
What is densities measured in?
Grams per cubic cm
Which is more dense, solid or liquid?
Solid because they are usually more packed in than liquids
What is the least dense out of the three states?
Gas
What happens to the density when a gas is heated?
It becomes less dense because the particles are more spread out
What is more dense, hot air or cold air?
Cold air
Will a dense object float or sink?
Sink
What does mass measure?
It measured how much matter is in a substance
What is mass sometimes incorrectly referred to as?
Weight
How is mass measured?
By using a beam balance or electric balance
What is volume?
The amount of space an object takes up
How can regular solids be measured?
By measuring dimensions rather than using an appropriate mathematical formula. It is measured in mm3, cm3, m3,
How are liquids measured?
They are measured accurately by using a measuring cylinder, it is easy to convert between mL and cm3 because 1mL = 1cm3
How are irregular solids formed?
Drop them in a measuring cylinder and compare the water levels
