P3 - Particle Mode of Matter

Question 1

What are the three states of matter.

Answer 1

Solid , Liquid , Gas

Question 2

Describe how particles are arranged in each state of matter.

Answer 2

Solid: Close packed , strong forces , regular fixed pattern , they vibrate , not much energy
Liquid : Close together , irregular pattern , more energy than solids , move past each other in random directions at slow speed
Gas: not touching , no forces , loads of energy , constantly moving at different speeds

Question 3

True or false ? The colder a gas , the higher the average energy in the kinetic energy stores of its particles.

Answer 3

False - Hotter gas

Question 4

What’s the formula for density ?

Answer 4

density (kg/m3) - mass (kg) / volume (m3)

Question 5

True or false ? solids are usually denser than gases.

Answer 5

True

Question 6

Describe how you find the volume of a irregular shape object.

Answer 6

measure its mass
Fill a eureka can with water
place a measuring cylinder under the spout
put object in and measure the volume of water in the cylinder
this is = to the object’s volume

Question 7

What is internal energy?

Answer 7

Is the total energy stored by particles in a system