3. Particle Model Of Matter Flashcards Preview

AQA GCSE Physics (9-1) > 3. Particle Model Of Matter > Flashcards

Flashcards in 3. Particle Model Of Matter Deck (25):
1

What is SA?

Surface area

2

Equation for volume of a rectangle?

V=hxbxl

3

Equation for volume of a triangle?

V=1/2xbxlxh

4

Equation for volume of a circle?

V=3.14r2xl

5

Equation for volume of a sphere?

V=4/3 3.14r3

6

Equation for density?

Density = mass/volume

7

How to measure mass of an irregular object?

Displacement method

8

What should water have a gradient of?

1

9

Why do gas particles move more quickly?

They have more energy when heated

10

What happens when particles have a higher kinetic energy?

Greater average kinetic energy so faster average speed

11

Equation for pressure?

Pressure = force / area

12

What is pressure measured in?

N/cm2 or N/m2

13

What is the symbol for density?

Rho

14

What happens when molecules collide with the wall of a container?

They exert a force on the wall

15

What is the unit area?

The total force exerted by all the molecules

16

What does the pressure of a gas depend on?

mass of molecules

speed of molecules - hitting walls more often

how many molecules - more molecules to hit the walls

17

What happens when the volume of a gas decreases while the temperature stays the same?

The average speed stays the same but the molecules hit the walls more often

18

What does Boyles law state?

The pressure of a fixed mass of gas at a constant temperature is inversely proportional to its volume

pV=constant

19

pV=constant or...

p1V1=p2V2

20

Why are things different densities?

some atoms might have more mass than others

some atoms may be smaller so more can fit in the same space

they might be arranged differently

21

Equation for mass?

Density x volume

22

Equation for distance?

Distance = speed x time

23

Equation for force?

Force = pressure x area

24

Equation for area?

Area = force / pressure

25

Reasons for a difference in mass of the same volume?

• some atoms may have more mass than others

• some atoms may be smaller so more can fit

• some atoms may be arranged different so more can fit