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