Density, pressure, particles, heat transfer

1-4: These questions are about states of matter:  
1. Which of these sentences is true?
  • A). In a gas the particles have strong forces between them
  • B) Liquids fill completely the container they are in
  • C) The forces are strong between particles in a solid
  • D) Particles in a liquid move faster than in a gas
Which of these descriptions matches which state of matter?  
2. Particles are widely separated.
3. Does not have a fixed shape.
4. Strong bonds hold the particles firmly in place.


5. Which answer best describes the difference between these 2 blocks?

2 blocks of metal

  
  • A) Block A has a larger volume than block B
  • B) Block B is denser than block A
  • C) Block A has more mass than block B
  • D) Block A has more tightly packed particles than block B

6. What is the formula for density?

  • A) Density = volume x mass
  • B) Density = volume / mass
  • C) Density = mass / volume
  • D) Density =  ½ x mass x (volume)
7. Which of these calculations below is the right one to find the mass of water in the cylinder shown here? measuring cylinder with water
  • A) (mass of cylinder) + (mass of water and cylinder)
  • B) ( mass of cylinder and water) - (mass of water)
  • C) (mass of cylinder) - (mass of water and cylinder)
  • D) ( mass of cylinder and water) - (mass of cylinder)

8-10: What are the missing values in this table showing the density of various substances?

 
Substance
Mass (g)
Volume(cm3)

Density (g/cm3)
8
Wood
20
25
9
Copper
36
9
10
Glass
400
2.5

11+12. Under a microscope, dust particles appear to move randomly around.

11. What is this effect called?

  • A) random motion
  • B) newtonian motion
  • C) zero point motion
  • D) brownian motion

12. What causes this motion?

  • A) fast moving atoms / molecules colliding with the dust particles
  • B) dust particles colliding with other dust particles
  • C) gravity pulling on the dust particles
  • D) random kinetic motion

13. Railway tracks have small gaps between them. This is to allow for the tracks to ..

  • A) expand and get longer on hot days
  • B) contract and get longer on hot days
  • C) expand and get shorter on cold days
  • D) contract and get shorter on cold days