Grade 8 Science. 100 200 400 300 400 BuoyancyDensity The shop Fluids 100 300 200 400 200 100 500.

Grade 8 Science

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Buoyancy Density The shop Fluids

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Row 1, Col 1

D = all of the above. None of theItems float on air!

Which has no buoyancy in air:

a) Water

b) Rock

c) Life vest

d) All of the above

1,2

Buoyancy is an upwardforce

Is buoyancy an upward or downward force?

1,3

Yes the ball will be buoyantBecause it is less dense

Than the syrup.

A ball with a density of 0.9 g/ml is put in a bowl of maple syrup. The syrup has a density of 2.5 g/ml. Will

the ball have buoyancy?

1,4

Neutral buoyancy

What type of buoyancy would a fish have that is’nt at the bottom of the lake and is’nt at the top of the surface?

2,1

The amount of mass per unitOf volume. How tightly Packed the molecules are.

Define the term Density

2,2

Density = Mass / Volume

What is the Math Formula to calculate Density of a substance.

2,3

D = m/v= 20g/10ml

= 2 g/ml

Calculate the density of a substance that has a volume of 10ml and a mass of 20g.

2,4

The density of a substance will Decrease. Molecules spread out

And takes up more volume. The Mass stays the same.

Explain what happens to the density of a substance that is heated.

3,1

The Drill Press

What tool is used for the purpose of drill a hole?

3,2

Tape the pieces together and cutThem at the same time.

What should you do if you are cutting several pieces of wood to the same length?

3,3

The framing square orCombination square.

What tool would you use to ensure that your angles are 90 degrees?

3,4

Trusses

What is added to structures to increase the strength of all joints?

4,1

Yes. It flows and fills the shapeOf the container it is in.

Is air a fluid?

4,2

Viscosity

What term describes the resistance of a fluid to flow?

4,3

Adhesion

What terms describes the attraction of a fluids molecules to other substances?

4,4

Lag time

What term describes the time it take for a reaction to occur within a pneumatic system?

5,1

Gravity is opposite the forceOf buoyancy

What force is the opposite of Buoyancy?

5,2

D = 200g/25ml=8g/ml

You have 1 minute to answer this question. The water collected after a lead ball was dropped into a full 100ml beaker was 25ml. The mass of the ball is 200 grams.

What is the density of the lead ball?

5,3

Geometer's Sketch Pad

What computer application could you use to draw an accurate and scaled sketch of a structure?

5,4

The molecules of a liquid areClose together so there is veryLittle room for compression. Therefore you get a reaction

Almost immediatly

Explain why a hydraulic system has very little lag time