Grade 8 Fluids (Density, viscosity, Buoyancy, Hydraulics, Pneumatics)

12 Questions | By Chiling | Last updated: Mar 22, 2022 | Total Attempts: 8743

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Grade 8 Fluids (Density, viscosity, Buoyancy, Hydraulics, Pneumatics) - Quiz

Fluids exist in different colors, weight, and viscosity. All throughout this week, we discussed the density, viscosity, buoyancy, hydraulics, and pneumatics. How much did you understand these subtopics? If you believe you understood much then all you have to do is take up this grade 8 tests and see if you need more study hours to properly understand the topics. All the best!

Questions and Answers

1.

In what states of matter can you find fluids?
- A.
  
  Solids, gases and liquids
- B.
  
  Gases and solids
- C.
  
  Gases and liquids
- D.
  
  Liquids and solids
2.

An important characteristic of fluids is that they can flow. Fluids can do this because...
- A.
  
  Particles in fluids are slippery
- B.
  
  Particles in fluids can move around each other
- C.
  
  Particles in fluids have a coating
3.

Gases are more compressible than liquids because...
- A.
  
  The particles in gas are more attracted to each other
- B.
  
  The particles in gas are smaller
- C.
  
  The particles in gas are farther apart
4.

Water is ________________ oil.
- A.
  
  Denser than
- B.
  
  Less dense than
- C.
  
  Has the same density as
5.

The particles in water are ____________ oil
- A.
  
  Farther apart than in
- B.
  
  The same as in
- C.
  
  Closer together than in
6.

Viscosity is caused by the ...
- A.
  
  Thickness of a fluid
- B.
  
  The attraction between the particles in a fluid
- C.
  
  The spaces between the particles in a fluids
7.

If an object with a density of 2g/mL, is placed in a water tank and displaces 10mL of water, what is the mass of the object?
- A.
  
  20g
- B.
  
  5g
- C.
  
  15g
8.

If 2 objects with the same mass are placed into water tanks...-object A displaces 10mL of water-object B displaces 15mL of waterWhich object is more dense?
- A.
  
  Object A
- B.
  
  Object B
9.

Because of the way the particles are, ____________________(hydraulics, pneumatics) is more efficent.
10.

Which would be easier?
- A.
  
  Holding a heavy object up on land
- B.
  
  Holding a heavy object in water
- C.
  
  They're both the same, it depends on the arm
11.

I want to make an ice cream sunde. I can't get the caramel sauce out of the bottle. What could I try to make the caramel sauce come out of the bottle easier?
- A.
  
  Heat up the bottle
- B.
  
  Put the bottle in the fridge
- C.
  
  Shake the bottle with more force
12.

Hydraulics and pneumatics are very similar. How are they different?
- A.
  
  Hydraulics uses water, pneumatics uses a gas
- B.
  
  Hydraulics uses a liquid, pneumatics uses a gas
- C.
  
  Hydraulics uses a gas, pneumatics uses a liquid
- D.
  
  Hydraulics uses a liquid, pneumatics uses a solid