6.3 Density Flashcards Preview

Year 8 Science Exam Semester 2 > 6.3 Density > Flashcards

Flashcards in 6.3 Density Deck (19):
1

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)

2

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

3

What is densities measured in?

Grams per cubic cm

4

Which is more dense, solid or liquid?

Solid because they are usually more packed in than liquids

5

What is the least dense out of the three states?

Gas

6

What happens to the density when a gas is heated?

It becomes less dense because the particles are more spread out

7

What is more dense, hot air or cold air?

Cold air

8

Will a dense object float or sink?

Sink

9

What does mass measure?

It measured how much matter is in a substance

10

What is mass sometimes incorrectly referred to as?

Weight

11

How is mass measured?

By using a beam balance or electric balance

12

What is volume?

The amount of space an object takes up

13

How can regular solids be measured?

By measuring dimensions rather than using an appropriate mathematical formula. It is measured in mm3, cm3, m3,

14

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

15

How are irregular solids formed?

Drop them in a measuring cylinder and compare the water levels

16

How do you calculate density?

Density= mass/volume

17

Why do icebergs float?

Because they are less dense than water

18

Why are icebergs dangerous to ships?

They shift with the oceans and winds, often move to shipping lanes and 80-90% is hidden below surface

19

How can ships try to help from crashing into icebergs?

By using a radar