G6 Unit 5: Water

Unit 5: Water

Essential Question: How is water unique?

Lesson 1: Water's Abilities

I can plan an investigation to demonstrate the ability of water to dissolve materials.

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Objective

Open Ended

What is one ability or property of water that makes it unique?

Multiple Choice

a substance that can dissolve a lot of different substances

• Universal Solvent

• solvent

• dissolver

Multiple Choice

Many substances will dissolve in water. That's why it is called -

• Great Dissolver

• Universal Solvent

Poll

Do you believe me when I say water is the universal solvent?

• Yes

• No

Multiple Choice

As scientists, what do you need in order to believe water is the universal solvent?

• proof

• my teacher to tell me its true

Multiple Choice

How could I prove that water is the universal solvent?

• you could make a joke about it

• you could tell me again that it is

• you could show me it is

• you could tell a story about it

Essential Question: How is water unique?

Lesson 2: Water's Properties

I can describe the properties of water and identify examples of cohesion, adhesion, and surface tension.

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Objective

The Water Molecule

Water molecules are made of the elements Hydrogen and Oxygen.

H₂O= 2 Hydrogen atoms and 1 Oxygen atom.

Multiple Choice

A water molecule is made of...

• All Hydrogen atoms

• All Oxygen atoms

• 2 Oxygen atoms and 1 Hydrogen atom

• 2 Hydrogen atoms and 1 Oxygen atom

I wonder...

What would happen if I squeezed a sponge out in outerspace

Open Ended

What do you think will happen?

Cohesion

Attraction between molecules of the same substance

Adhesion

An attraction between molecules of different substances

Adhesion Examples

1. Water drops holding onto plant leaves

2. Water attaching to a spider web

Open Ended

So what happened to the water in space? Is it what you expected? Use the words adhesion and cohesion in your answer

Surface Tension

• Cohesion creates a film on the surface of water. Surface tension is the strength of that film.

• It allows for insects to walk on the surface of water and causes "belly flops" to hurt.

Multiple Choice

An attraction between molecules of different substances

• Cohesion

• Adhesion

• Surface Tension

Multiple Choice

The strength of the film on a surface of a liquid

• Cohesion

• Adhesion

• Surface Tension

Multiple Choice

Attraction between molecules of the same substance

• Cohesion

• Adhesion

• Surface Tension