science - states of matter, brownian motion & density

Question 1

what are the properties of a solid

Answer 1

Tightly packed, vibrate in a fixed position, fixed shape

Question 2

properties of liquid

Answer 2

randomly arranged, close together, move around each other, flow and take shape of container

Question 3

properties of gas

Answer 3

randomly arranged, far apart, move quickly in all directions, flow and completely fills container

Question 4

which state of matter can be compressed

Answer 4

gas

Question 5

density

Answer 5

how closely packed particles are

Question 6

what is the equation + units for density

Answer 6

mass/ volume (kg/m³)

Question 7

Regular object

Answer 7

object that you can calculate the volume of easily

Question 8

examples of regular objects

Answer 8

spheres, cubes

Question 9

irregular object

Answer 9

object with unusual shape , harder to calculate volume

Question 10

what do you use to find the volume of an irregular object

Answer 10

eureka can

Question 11

what happens when a substance is heated?

Answer 11

• gains energy
• mass doesn’t change
• forces are overcome when the substance gains enough energy

Question 12

What happens to the temperature of a substance when a change of state happens

Answer 12

it stays the same

Question 13

melting

Answer 13

sold-> liquid

Question 14

freezing

Answer 14

liquid-> solid

Question 15

condensation

Answer 15

gas -> liquid

Question 16

evapouration

Answer 16

liquid -> gas

Question 17

brownian motion

Answer 17

particles in liquids + gases move randomly

Question 18

gas pressure

Answer 18

in sealed containers , particles exert force when colliding with container walls and applies pressure to container

Question 19

what increases gas pressure

Answer 19

the more often paticles hit the wall, the faster they move, heating container up