Grade 8- Fluids Learning Goals: 1.I am learning the uses of fluid technologies 2.I am learning how the particle theory of matter explains differences between.

Grade 8- Fluids

Learning Goals:

1. I am learning the uses of fluid technologies

2. I am learning how the particle theory of matter explains differences between solids, liquids, and gases

Key Vocabulary

Fluid-any substance that flows (including liquids and gases)

Slurry- a mixture of water and small solids

Matter- anything that has mass and volume

Mass- the amount of space a substance takes up

Particle Theory of matter- a way of describing matter and how it behaves

Thermal expansion- when the temperature of a substance increases it gets larger or takes up more space

Elbow partner thinking

Brainstorm all the fluids you have already used this morning as you were preparing for school!

Good Old Bill Nye

https://www.youtube.com/watch?v=aNHiZNYjsho

Gr. 8 Fluids

1. I am learning how to determine the buoyancy of an object.

2. I am learning how a submarine works.

Key Vocabulary

Buoyancy- is the tendency of an object to rise or sink in a fluid.

Buoyant force- is force in a fluid that pushes things upward.

Pressure- the amount of force applied to an area

Density- the amount of mass in a certain volume

The Cartesian Diver

1. What happened to the diver when you:

a) Squeezed the sides of the bottle

b) Released the sides of the bottle

2. Did the weight of the diver increase or decrease when you squeezed the bottle?

3. Suggest a possible explanation for why the weight of the diver changed?

How a submarine works?

https://www.youtube.com/watch?v=yb3e4IegeJ0

What is the function of the ballast?

The Many Uses of Fluids

Learning Goals

1. I am learning that fluids hold and transport other materials.

2. I am learning that substances in their fluid form can be shaped and then cooled to become solids.

Starting Point

Make a list of all of the different fluids you think of that are used in automobiles.

Fluids transporting Solids

Slurry- mixture of water and solids

Slurry Technology- the transport of solids in water

Hydro seeding

https://www.youtube.com/watch?v=pVOdXg9GC9I

Other examples;

The process of making paper

Fluids Can hold other MaterialsFluids can hold or carry other materials make them useful in many application

Ie: Toothpaste, cytoplasm in your cells. DC 10

https://www.youtube.com/watch?v=DQwZQrDOGRk10

Fluids become Solids

Fluids are easier to move and they take the shape of their containers.

Ie: Slurry of Cement,

The making of Steel:

The mixture of iron, carbon and hematite are heated to 1650 degrees C to melt everything together so more materials can be added.

Other uses of Fluids

Oil is added to the engine of a car to decrease friction

Paint is applied to iron to prevent rust from forming

A Fluid circulating in the back of your fridge keeps temperatures cool.

Fluids such as gases can be forced into smaller volume Ie: scuba tanks

Fluids- Grade 8

I am learning how Liquids can Flow

I am learning how Gases can Flow

I am learning how matter can expand

The Particle Theory of Matter1. All matter is made up of tiny particles

2. All particles are in constant motion

3. All particles of one substance are identical

4. Temperature affects the speed at which particles move.

5. In liquids and solids the particles are close together and have strong forces of attraction

6. In a gas, there are spaces between the particles.

Liquids can Flow

Particles in a liquid can overcome some of their attraction to each other and slide past each other. This is why liquids flow and take shape of their container.

Gases can Flow

Gas particles move so quickly and are so far apart they they overcome almost all of their attraction to each other. This is why gases flow and spread out to all parts of their container.

Ie: if you spray air freshener in one part of a room, you can soon smell it in other parts of the room.

Thermal Expansion and Contraction

When the temperature of a solid, liquid or gas decreases, it particles move slowly and close together. As a result the substance shrinks or contracts. Substance expand or contract with changing temperature at their own particular rate.

Mixtures of Matter

In Smalls groups of 3-4 complete the mini lab.

Once you have completed the lab. Use your particle theory of matter to explain what happens when substances are combined?