Lesson video

Hello, my name is Ms. Chorekdjian.

I'm so excited to be learning with you today.

I will be guiding you through our lesson.

We're going to do some great learning together.

Let's get started.

Welcome to today's lesson from our unit called The Water cycle: why is it important? This lesson is called the water cycle.

Your learning outcome will be to recognise, describe, and sequence processes of the water cycle.

Some of this learning is brand new, but I'm here to help you.

This links back to previous learning you might have done about the weather and its features and about different types of water features locally and globally, from ponds to oceans.

Here are the keywords we will be using together in today's lesson.

Before we find out what they mean, let's practise saying them together doing my turn, your turn.

Process.

Process.

Liquid.

Liquid.

Water vapour.

Water vapour.

Good job, everyone.

Let's find out what these key words mean.

Process.

A process is an ordered series of actions, events, or changes that make something happen.

Liquid.

A liquid is a form of matter that can flow and does not have a specific shape like solid matter does.

Water vapour.

Water vapour is water in a gas form rather than liquid form, for example, when it evaporates from being heated.

Good job, everyone.

I want you to be using these keywords throughout our lesson.

Here are the learning cycles that we will be working through together in today's lesson.

First, we will look at what is the water cycle and then we'll think about what processes happen in the water cycle.

I'm really excited about today's learning.

I hope you are, too.

Let's get started.

More than 3/4 of the Earth's surface is covered by water.

A lot of water is stored in the ocean and seas.

Water is constantly moving around the Earth in the water cycle.

Let's find out more about the water cycle and what it is.

Do any of you know what the word cycle means? Pause the video and see if you can guess with your partner.

This diagram shows the process of a cycle.

A cycle happens when a series of events or processes is regularly repeated in the same order and never stops.

So you can see the direction of arrows moving constantly round and round in a process or series of events and it's constantly moving.

It never stops.

The water cycle is a repeated series of processes involving water.

The amount of water on Earth never changes, so the amount of water that we have on earth stays constant.

The water cycle does not create new water and new water is never added to the water cycle.

It's just the same water that's on Earth that goes round and round in a repeated process that is constant.

So the water we drink today was once drunk by the dinosaurs.

That's a pretty amazing fact to be thinking that we're drinking the same water that dinosaurs would've drunk in the past.

It's now time for a quick check.

This is a true or false check.

That means you've got to think really carefully about whether or not this statement is true or false.

The water cycle does not create new water.

Is that statement true or false? Pause the video here and answer that check.

How did you get on? Did you say true? That's correct.

The water cycle does not create new water.

Now, let's think about justifying our answer and explaining why it's true.

Is it true because, a, water is moved around Earth by the water cycle? Or b, the amount of water on Earth never changes, it always remains the same.

Pause the video now and justify your answer.

How did you get on? Did you say b, the amount of water on Earth never changes, it always remains the same? That's correct.

So the water cycle does not create new water because the amount of water on Earth remains the same, it's always constant, and it's always going round the water cycle in that process.

Good job, everyone.

You can give yourselves a thumbs up.

That's fantastic learning so far.

It's now time for your first task.

What I would like you to do is to answer this question.

What other cycles can you think of? Think about things that happen in school, at home, or in nature.

What can you think of that is a cycle? That's a series of events or processes that are repeated and never stop.

Create a list of other cycles that you know and discuss them with someone else.

Pause the video here and complete Task A.

Well, geographers, how did you get on with Task A? What other cycles did you think of? This pupil has said, "I think our school day is a cycle.

We have lessons, a break, lunch time, lessons, home time, homework and then do it again the next day!" So that's an example of a cycle.

Something that is repeated constantly.

This pupil has said, "Great idea! I think some trees show us a cycle with their leaves.

They grow in spring, then fall in autumn, then grow again in the next spring!" That's another example of a cycle.

So well done if you said either of these two examples.

Good job, everyone.

You might have also thought about some life cycles of plants and animals as well because I know you might have studied that in science and some other lessons too.

Well done, everyone.

You can give yourselves a big thumbs up for completing that first task.

Let's move on with the rest of our learning.

Now, it's time to think about what processes happen in the water cycle.

This diagram shows the water cycle, so what I'd like you to do for a moment is to take a minute to have a look at the water cycle and then we're going to talk about the processes that are involved.

Great, so you've all had a chance to have a look at this cycle, let's go through it in more detail.

The arrows show the direction of movement of water.

So this goes round in a clockwise movement.

You can see the direction of arrows show us the processes in the right order and how they're constantly repeating.

There are four main processes in the water cycle: condensation.

So what happens here is water condenses and forms clouds.

After condensation, we have precipitation.

Water falls as precipitation.

So you can see the water that's falling from the clouds as precipitation.

Then we have collection.

So water collects in lakes and rivers and other bodies of water and then when it collects in those bodies of water, it could drain into the sea.

Once it's in the sea or other bodies of water is the final process in this cycle called evaporation.

During evaporation, water from the sea changes from a liquid to a gas and then it condenses into clouds, and so the cycle begins again.

Let's go through these four processes together.

Condensation.

Condensation.

Precipitation.

Precipitation.

Collection.

Collection.

Evaporation.

Evaporation.

Good job, everyone.

So you've looked at this diagram on your own and now we've gone through this diagram together, what I would like you to do is to pause the video again and go through the diagram once more explaining the water cycle to your partner.

Talk about the four main processes that are involved and what happens at each stage.

Pause the video and talk to your partner.

Well done, everyone.

I'm sure you discussed that really well with your partner and you remembered the four main processes in the water cycle.

We had condensation, precipitation, collection, and evaporation.

Remember that during condensation, water condenses and forms clouds, and then during the precipitation process, water falls from those clouds as precipitation, and then water collects in lakes and rivers during the collection process and it drains into the sea from rivers, and once in the sea, that water evaporates and then starts to cycle again with condensation, as that evaporated water condenses and forms clouds.

So well done, everyone.

That's quite tricky process to remember, but the important thing is that it is a cycle and it repeats constantly.

Remember we've said that all the water on Earth remains constant.

No new water is added but all of the water on Earth is engaged in this process of the water cycle.

It's now time for a quick check.

Which of these are processes in the water cycle? a, evaporation, condensation precipitation, b, raining, swimming, sailing, or c, vapour, droplets, or rain.

Pause the video now and answer this check.

How did you get on? Did you say a, evaporation, condensation, and precipitation? Good job, well done if you did.

That's fantastic work.

You can give yourselves a quick thumbs up.

Let's look in more detail at each of these processes that happen during the water cycle.

Evaporation is when liquid water turns into water vapour.

So that's the change of state, that change of matter from liquid to gas, and like we said, the liquid water turns into water vapour.

Evaporation happens when heat from the sun causes the liquid water in oceans, lakes, rivers, soil, and vegetation to warm up and evaporate.

This fills the atmosphere air with water vapour.

As the air containing the water vapour rises, it cools down and the water vapour begins to turn back into small droplets of liquid water.

This process is called condensation.

Clouds are made up when the droplets of water clump together.

Let's have a quick check here.

So we've gone through two processes so far.

We've gone through the process of evaporation and the process of condensation.

Let's answer this question to check our knowledge so far.

Which process turns liquid water into water vapour? Was it a, evaporation, b, condensation, or c, precipitation? Pause the video and answer that question.

How did you get on? Did you answer a? That's correct.

So the process of evaporation turns liquid water into water vapour.

Well done, everyone.

You can give yourselves another thumbs up.

That's fantastic learning so far.

Let's now go through the other two processes that are involved in the water cycle.

Water droplets in clouds grow bigger and bigger.

These big water droplets then fall to the surface of Earth as precipitation.

This precipitation could be rain, hail, snow, or sleet.

All of those different things are examples of precipitation falling to the surface of the Earth as clouds gets bigger and heavier, and that is known as precipitation.

Precipitation falls into lakes, oceans, or rivers where it is stored.

This process is called collection.

Water can also be collected and stored by vegetation.

Or it can fall on the ground, into the soil, or down drains.

This liquid water then evaporates and the water cycle starts all over again.

Remember that a cycle means that it's constantly going round and round and round.

And like we said, the water that we drink now is water that could have been drunk by the dinosaurs all those millions of years ago.

So we've looked at the four main processes that happen in the water cycle, it's now time to check your knowledge to see if you know exactly what happens in each of those processes.

So on the left hand side, we've got the name of the processes, evaporation, condensation, collection, and precipitation, and then on the right hand side, we've got a description of what happens in each of those processes, wet weather such as rain, liquid water becoming water vapour, water vapour becomes tiny droplets of liquid water, water stored in lakes or seas, and what I would like you to do is to match each of those processes to the correct description.

Pause the video now and complete that check.

How did you get on? Did you say that during the process of evaporation, liquid water becomes water vapour? That's correct.

Well done.

Did you say that during the process of condensation, water vapour becomes tiny droplets of liquid water? That's also correct.

Well done.

Did you say that during the collection process, water is stored in lakes or seas? That's also correct.

And then finally, did you say that during the process of precipitation, wet weather such as rain, sleet, or snow fall to the ground? That's correct.

Well done, everyone.

You can give yourselves another thumbs up.

That shows me that you really understand these processes that are involved in the water cycle.

It's now time for Task B.

What I would like you to do is to label the four processes of the water cycle on the diagram.

You can choose from the four words that are below: condensation, collection, precipitation, and evaporation.

Then, what I would like you to do is to draw arrows to show the direction of water movement.

Remember that the direction of water always remains the same.

It doesn't change direction.

Then for the final part of Task B, what I would like you to do is to choose one process of the water cycle and explain it to someone else clearly so they can understand what happens in that process.

Pause the video now and complete Task B.

How did you get on, geographers? Here's what I did for part 1 and part 2.

So I've labelled those four processes on the diagram of the water cycle.

I've labelled condensation, precipitation, collection, and evaporation and you can see there that I've drawn the arrows in that clockwise motion to show the direction of water movement.

Well done if you've done those two bits correctly.

You can give yourselves a thumbs up.

Now, for the final part, you have to choose a process of the water cycle and explain it to someone else.

Have you explained it in the same way as these pupils? "The process of evaporation happens when the sun warms the liquid water in lakes or rivers and evaporates into water vapour." "Condensation is when water vapour forms small droplets of water which clump together to make clouds." "Water droplets in clouds then fall to the ground as rain or snow.

That's precipitation!" And finally, "Rain water is then collected by lakes, rivers, or even seas and oceans.

Soon it will evaporate and start the water cycle again." So you can see that those four processes that happen in the water cycle are clearly explained by those pupils.

Well done if you've explained them in a similar way.

Good job, everyone.

That was really tricky learning that we've done today but you've worked through it so well.

You can give yourselves one last thumbs up.

Fantastic learning for today.

You've thought really hard about what the water cycle is and the four main processes that happen in the water cycle.

We've now come to the end of our lesson.

Let's go through a quick summary of all the learning that we've completed together today.

Water moves around the Earth in the water cycle.

There are four main processes in the water cycle: evaporation, condensation, precipitation, and collection.

The water cycle is continuous, it never stops and the amount of water on Earth always stays the same.

Well done, everyone.

You've been fantastic today.

Thank you for joining me and for sharing your learning with me.

I'll see you next time for more geography lessons soon.

Goodbye.