Hi everyone, I'm Mrs. Courts and I'm very excited to join you today for our lesson on rotary motion.

This is part of the Rotary Mechanisms: Windmills unit.

Let's begin.

Our lesson outcome for today is I can describe rotary motion, I can describe rotary motion.

We've got three new keywords for today, and I'm gonna say the keyword first and then you can repeat after me.

Are you ready? Rotary motion, rotary motion.

Well done.

Rotary motion means something that turns around in circles.

Water wheel, water wheel.

Super.

A water wheel is a large wheel driven by flowing water, so moving water.

Water well, water well.

Super.

A water well is a hole used to get water from deep under the ground.

Water wheel and water well are two different words, make sure you listen and watch out for them carefully.

In our lesson today, we have got two learning cycles.

Our first learning cycle is rotary motion using water.

Are you ready? This is our water wheel.

Can you see it in the picture? I bet you can guess how it might work.

Have a look.

When flowing water, when moving water, hits the paddles, can you spot the paddles? There's a little arrow pointing to the paddles, look.

The water wheel will turn.

It goes round and round and round.

The water wheel turns in a rotary motion.

Do you remember what rotary motion means? That was one of our keywords.

Do you remember? (Ms. Courts gasping) Well, if you have a look at the wheelbarrow, you might spot something that moves in that rotary motion.

Rotary means circle-shaped.

Do you remember? Circle movement.

And it spins like the wheels on your bike, scooter, or on this wheelbarrow.

Can you point to the wheels and see if you can make them go round? I'm gonna have a go first, and I'm going to make a circle shape with my finger in the sky.

Have you followed it? Right, it's your go, your turn! Can you make a circle shape with your finger or your hand in the sky? Well done.

"What are water wheels used for?" asked Alex.

Hmm, I wonder what they're used for.

Let's have a think.

This water wheel turns and grinds wheat into flour.

Rotary motion can produce electricity in power plants.

Can you see this power plant? Look at all the water.

This dam has giant water wheels that turn as water passes through, producing electricity.

You might use lots of electricity in school when you switch the lights on, or at home if you're watching the television.

Or maybe you are watching somebody cook dinner, or helping to cook dinner.

All of those things, the oven, the fridge, the kettle, the toaster, all those things use electricity.

And the television, and your lights.

You might think of lots more things that use electricity.

This is a water wheel.

You might find them in a water tray.

Have you seen one of these in your school? When you pour water in the top of the water wheel, it pushes the water wheel around and around and around.

The faster you pour the water in, the faster the wheel will turn.

We're ready for our first check for understanding.

Are you sitting nicely? Brilliant.

This is a true or false question.

When water is poured on the water wheel, the water wheel will turn.

Is that true or is that false? When water is poured onto the water wheel, the water wheel will turn.

Is that true or false? Pause the video and have a little think.

When water is poured on the water wheel, the water wheel will turn, is true.

Well done.

I wonder why.

Hmm, why is that true? That's right.

The water is poured in, and when it reaches the wheel it pushes the paddles around.

Well done.

What happens if the water is poured in slowly? Hmm, I wonder.

If it's poured in fast, the water wheel goes fast.

What happens if it's poured in slowly? Sam said, "The speed of the wheel will slow down." Is Sam right? Maybe you can pause the video and have a little think.

That's right, Sam is right.

The wheel will spin slower.

Can you see the water hitting the water wheel? It's going much slower in this video, isn't it? We're ready for our first task.

You need to find a water wheel and see if you can spot the rotary motion.

Do you remember what rotary motion means? That's right.

That's when it moves in a circle shape.

You've got to find a water wheel and see if you can make it spin faster, faster.

And then see if you can make it spin slower.

Pause the video now, and return when you've completed the first task.

Have lots of fun.

Welcome back.

I hope you've had lots of fun experimenting with the water wheel, and seeing if you can make it spin faster and slower.

Did you spot the rotary motion? Do you remember that circular movement, the circle movement? Did you spot it on the water wheel? I wonder, let's find out how everyone got on.

Well, Lucas, he said, "The rotary motion is when the wheel turns around in a circle." Well turned, Lucas.

Did you spot that on your water wheel? You did? Brilliant.

Well done.

Well, Sam said, "The wheel went faster when more water was poured in, and, as you can see, there's her water wheel going super fast.

Well done, Sam.

Andy Izzy said, "The wheel went slower when not as much water was poured on the water wheel." Well done, Izzy.

You can see the difference, that top one is moving very fast and the bottom one is moving very slow.

The more water you pour in, the faster the wheel will turn.

Well done, everybody.

We're ready for our second learning cycle now, Rotary motion to lift objects.

We've had lots of fun in our first learning cycle.

, let's see what we're up to in the second.

These are water wells.

They help us to get water from deep underground.

You might remember that from one of our keywords at the beginning of today's lesson.

A water well is different, you remember I said, to a water wheel.

So a water well helps us to get water from deep under the ground.

This is a water well.

Have a little look at it.

The main parts of the water well are the handle, the bucket, an axle, a well, and the water, which you can't see but it's really far, really deep under the ground.

This is our first check for understanding.

Are you ready? A water well gets water from.

Hmm, can you remember this? The sky, deep underground, or the sea.

A water well gets water from.

the sky, A, deep underground, B, or C the sea? Pause the video and have a little think.

A water well gets water from (gasps) deep underground.

Well done, and excellent listening today.

Do you remember? The bucket goes all the way down to get water from deep under the ground.

Well, I've just given a clue away, haven't I, because this is how the water well works.

By turning the handle, the axle rotates, that means turns, in a rotary motion.

You might remember, rotary motion means in a circular movement.

Okay, so this is how the water well works.

You turn the handle, and the axle will turn in this rotary motion.

When that happens, the rope will wrap around the bar, raising the bucket out of the well.

So the bucket will move up, up, up, up, up, and the rope will wrap around the bar, pulling the bucket up out of the well.

Ready for our next check for understanding.

Are you ready? Hope you've been listening.

Which picture shows the handle on a water well? Which picture shows the handle on the water well? Is it A, s it B, or is it C? Pause the video and have a little think.

Which picture shows the handle on the water well? It is A.

Well done.

That was quite tricky, but you spotted that handle where the arrow points to on the water well.

Well done.

Sam says, "Does the water well produce electricity?" Hmm, that's a very good question.

Alex says, "What do you think?" Hmm.

No, the water well is used for lifting.

Do you remember, it gets water from deep under the ground.

Well done.

This is one way to make a water well.

This one uses chairs and a metal rod.

Can you see the chairs and the metal rod? You could use chairs and a wooden dowel instead.

As you turn the dowel, the pot moves up and down in the well.

Can you see it turning? So, as the dowel or the metal rod turns, the pot goes up and down.

To make a water well, move two chairs apart to make a gap between them.

Attach a pot to the string, and attach the other end of the string to the wooden dowel, and turn the dowel to raise and lower the pot.

This is something you could do in your classrooms or at home.

To make the water well, we need these materials and these pieces of equipment.

Some tape and scissors, a wooden dowel, some string and a plastic pot.

You might also choose some objects to put in your plastic pot, to show that you can raise it up and lower it down with the things inside it.

You will also need a hole punch.

We are ready for our next task now, Task B.

Are you listening really carefully? Super.

Make your own water well, and when you've made it, does your water well work? Hmm, it's a bit of a challenge, isn't it.

Make your own water well, and then, does your water well work? Pause the video and join me once you've completed Task B.

Welcome back.

Well, I'm ready to see how you got on with Task B.

Did you manage to complete your water well? Brilliant.

Well, this is Alex's water well, and he worked with his friend.

It's very important to work together, isn't it.

Can you see Alex's water well goes up and down? Did you notice anything else? Well, Alex says, "My water well worked very well.

We worked well as a team, and the faster we turned the handle the faster the bucket moved up and down." Did you notice anything different to Alex? Maybe you could share that with another adult or your friends.

We've reached the end of our lesson for today, and we've learned lots of exciting things along the way and completed some very exciting challenges.

So, I wonder if you can give me a thumbs up if you think that you can do these things now.

Are you ready, you're listening really carefully? Brilliant.

So, rotary motion is where something is turned or rotated.

Do you remember that, making a circle? Did you see your water wheel turn in a circle? Did you see your water well, when you turned it, it turned in a circular motion, that rotary motion.

If you think you did that, give me a thumbs up.

Well done.

Water wheels produce electricity.

Give me a thumbs up if you've learned that today.

Well done.

And water wells are rotary mechanisms that get water from deep underground.

Brilliant.

Yes, do you remember the pulley going all the way down and raising up that water well, the bucket all the way to the top to get the water? And water wells use a pulley system to lift water by turning the handle.

We've learned lots of things today, haven't we, and you've worked so hard.

Well done, and I'll see you next time.

Bye.