Lesson 2 - Water

Hello, everybody.

Welcome to listen to you on water today.

We're gonna be exploring two questions.

Firstly, why does the amount of water storage change based

on where it is and what year it is to

answer those questions together as a group, we're going to

be comparing Happy Valley Reservoir and South Power Reservoir to

predict which one contains more water.

And then you were going to go away and take

what you've learned and tell me if you think my

ponder has more is more like South power.

What does it contain?

A more similar amount.

Toe happy valley.

The next question we're going to lead end with is

if the amount of water varies, what is the thing

that South Australia does to make sure we have enough?

So let's get started.

So today you have got a worksheet.

And thank you.

For those of you that completed your worksheet last week,

I've taken a read of your worksheet on especially was

interested in your answers to your question.

Why do different reservoirs contained different amounts of water?

These are some of your thoughts here.

So you said potential water use out of the reservoir,

The sizes the reservoir, how much the reservoir loses to

evaporation or how much it gains due to rain.

We're gonna be exploring each one off these that you

came up with a bit further today and applying them

to Happy Valley and South Power.

Yeah. So let's jump straight into the first one water

use. So here is a map off where the three

reservoirs are located.

South para at the top.

Closer toe.

Elizabeth, Angola.

Happy Valley.

Really close toe.

Adelaide and my ponga down the bottom closer to Victor

Harbor. Because Happy Valley is close to Adelaide, it supplies

most of the Adelaide's CBD.

That means Happy Valley supplies about 500,000 people compared to

South Power, which only supplies about 85,000 people.

Pulls the video now and answer question one based on

this fact alone, Which one do you think would storm

or water?

Thank you for pausing If you had said South Power,

I would agree with you because South Power uses less

water or supplies less people.

It is more likely to have left mawr leftover to

be stored within the reservoir.

That's why I said South Power.

What's going to the next one we're going to talk

about, firstly, to questions on this slide.

Firstly, the size of the reservoir.

So South Power is 28 Giga Leaders and Happy Valley

is about half of that at 13.

Giggle leaders.

I'd like you to pause the video and answer question

two based on size.

Which reservoir do you think stores?

More water?

If you had said South Power, I would agree with

you on.

That's because South power is bigger.

It can hold more water.

Now let's go to something a little bit more tricky.

Let's talk about evaporation now.

You're going to need to know what evaporation means If

you can't remember, refer back to your worksheet where we

write down the definition of evaporation.

If you can't find your worksheet, I'll read to you

the definition that one of your colleagues came up with.

And that is evaporation is when the sun heats up

water and turns it into gas, which means that water

is lost from a liquid into a gas into the

sky. So evaporation is the loss of water as it

hates up and turned into a gas.

So how can we predict evaporation rights well, South power

is really deep.

It's 44 m deep, whereas Happy Valley is 23 m

deep, so it's about half the death To think about

that. Let's compare to dishes.

I've got a shallow dish on a deep dish.

The deep dish is more like south power.

The shallow dish is more like Happy valley.

I filled both of these up with water at the

start of the day.

I filled them up with the same amount of water.

This one has, ah lot of water left, and this

one only has a little bit of water left.

If you don't believe me, try this at home.

The reason that is is because this is shallow.

The sun is able to heat up more of the

water, causing mawr of the water to evaporate.

Therefore, this one will dry out quicker.

So pause the video now and have a think.

Based on this, which one would have Ah, faster evaporation,

right? And based on that, which one would have mawr

left over Soto?

Ask that in a different way, would the shallow reservoir,

Happy Valley or the Deep Reservoir lose more water per

year? And if it loses more water per year.

It's gonna have less left over.

So the opposite one would have mawr left.

Thank you for pausing If you had said Happy Valley

would lose more water, I would agree with you.

And if you had said because Happy Valley loses more

water through evaporation South power, the deeper one would have

more water.

I would have agreed with you too.

Okay, let's move on to something even more tricky.

So I'm going to try and take it nice and

slow. We're gonna be talking about rain.

We're gonna be talking about which one gets more rain

M y.

So to answer why rain happens, we're going toe.

Have a look back at our water cycle.

So here on the screen is water cycle, So rain

is formed When the sun heats up the water typically

in the ocean.

When the sun heats up that water, it evaporates.

So it turns into a gas moves up into the

sky. As the water droplets called down or the water

gas draws calls down, it condenses into rain or clouds.

So those clouds then move inland.

When they're going over flat ground, they just float along.

However, when they come up against a hell.

Those clouds move up and over the hill.

As they moved up, they called down more and more.

So that means more off the gas cools down into

rain. Those clouds then become very heavy and drop their

reign on to the top of the hell that water

runs dense.

Seo Seo.

Sorry, guys.

My laptop went flat.

That's not sorry, guys.

My laptop went flat, so I've now moved inside and

turned off the TV.

So to recap, as the clouds move up over the

hell, they become colder, which makes more water condense.

That means the cloud gets heavier.

As the cloud gets to the top of the hill.

It gets too.

Lesson 2 - Water

Audio TranscriptAuto-generated