Module F Unit 1 Lesson 1: Water and Its Properties

Unit 1 Lesson 1

Water and Its Properties

What makes water so important?

By the end of this lesson, you should be able to describe water's structure, its properties, and its importance to Earth's systems.

Multiple Choice

True or False: Most of the water on Earth is fresh water.

• True

• False

Multiple Choice

True or False: Water exists in three different states on Earth.

• True

• False

Multiple Choice

True or False: Water can dissolve many different substances, such as salt.

• True

• False

Multiple Choice

True or False: Flowing water can be used to generate electricity.

• True

• False

Labelling

The image shows a water molecule. What do each of the three parts represent?

Drag labels to their correct position on the image

Oxygen

Agua

Helium

Hydrogen

Open Ended

What roles do you think water plays on Earth?

(Use Info from Reading)

-Water is vital for life on Earth!

-Only 3% of the water on Earth is fresh water - of that, 69% is frozen in glaciers and ice caps.

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Water...

- Influences Weather

- Shapes Earth's surface

- Supports Life

- Supports Human Activities

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​What are some of the roles of water on Earth?

- Water constantly moves from the surface to the atmosphere - forming clouds - falling back to the surface as ___, ___, ___, or ___. Weather depends on the amount of moisture in the air

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​Weather is Related to Water

- Overtime water can completely reshape a landscape.

- Examples???

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​Water Shapes Earth's Surface

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- Nearly every living this is made up of water and all biological process need water.

- For Humans clean water is needed for....

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​Water Supports Life

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What do you use water in your daily life to do?

- More freshwater is used in industry than used in homes - OVER 20%!

- More water is used in agriculture than industry for crop irrigation and farm animals.

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​Water Supports Human Activities

Open Ended

List at least 4 roles of water in this scene.

Molecular Attraction

What is the molecular structure of a water molecule?

What makes a polar molecule?

What states of water occur on Earth?

-Made of two hydrogen atoms and one oxygen atom - H20

- Forms a shape like a certian cartoon mouse's ears

What is the structure of a water molecule?

Multiple Choice

$$H_2O$$  is a ________ molecule.

• polar

• nonpolar

• ionic

• metallic

Multiple Choice

The oxygen end acts _____, while the hydrogen end acts ______.

• positive, positive

• negative, negative

• positive, negative

• negative, positive

Multiple Choice

Hydrogen Bonding occurs when the negative _______ of one $$H_2O$$  molecule attracts the positive ______ of another $$H_2O$$  molecule.

• oxygen, hydrogen

• hydrogen, oxygen

• hydrogen, hydrogen

• oxygen, oxygen

Water - The Universal Solvent

What are the four properties of water?

Multiple Choice

In cohesion, water molecules attract...

• other molecules.

• each other.

• to nothing.

Multiple Choice

In adhesion, water molecules attract...

• other molecules.

• each other.

• to nothing.

​Let's Experiment!

Open Ended

Ice is less dense than liquid water, why would this be important for organisms that live in ponds that can ice over during the winter?

Open Ended

Why is it important for our human bodies to have water with high specific heat capacity?

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