Lesson video

Hello everyone.

My name is Ms. Panchal and I'm so excited that you've decided to join me on today's science lesson.

Now our learning today is part of our bigger unit of learning on the introduction to light and shadows.

And in our lesson today we're going to focus particularly on making shadows.

Now, some of you might already know a little bit about shadows and some of you might not be so sure, but don't worry 'cause we're going to do lots of fantastic learning today.

Are you ready? So the objective for our lesson today is, I can explain how shadows are formed.

So let's look at a few keywords that we're going to use in our lesson today.

And some of you may have seen these keywords before or know what they mean, and some of you may not have seen these words before.

But don't worry because we're going to talk about them throughout our lesson today.

Now, when we look at keywords in a lesson, it's really important we're able to learn how to say them as well.

So I'm going to say the word and I would like you to repeat it back to me.

My turn, shadow, your turn.

Super job.

My turn, object, your turn.

Superstar, well done.

My turn, light source, your turn.

Well done.

My turn, opaque, your turn.

Super work, everybody.

Well done.

So I'm going to read the definitions to you, but we're going to be using these words throughout our lesson today.

So as we go through the lesson you'll get to learn more about what these words mean.

So the word shadow is a dark shape that is formed when an object blocks light.

An object is something you can touch.

That's something that is not usually a living thing.

A light source is something that produces its own light.

An opaque is a light cannot pass through objects that are opaque.

So as I said, all of these words we're going to use in our lesson today.

So for our making shadows lesson, we're going to split our lesson up into two parts.

So the first part of the lesson we're going to be thinking about how shadows are formed, and the second part of the lesson we're going to be looking at the shape of shadows.

Are you ready? Let's get started.

So, it is a sunny day and Laura and Andeep are playing outside.

Laura says, "Look, I can see something dark on the ground.

Is it a hole?" And we can see a picture here.

Have you seen this maybe in the playground before? Do you know what it could be? Have a think with your talk partner.

What do you think Laura can see on the ground? Have you seen it before? What do you think? Great discussion, everybody.

I know that I've definitely seen something similar on the ground to what Laura can see.

So, we've got Laura at her shadow here and Andeep has said to Laura that that's her shadow.

Can you say that word for me? Excellent, well done everyone.

So, we're now going to have a think a little bit about what actually is a shadow.

So pause the video here and jot down some of your ideas on a whiteboard.

What do you think a shadow is? Excellent ideas, everybody.

Well done.

So when light falls on some objects, a dark shape is formed on the other side of the object.

And we've got a picture here of a shadow of a person.

And Andeep says, "Light from the sun is shining on you and you are the object that has formed a shadow." Can you see any shadows near you? So what I'd like you to do is pause the video here and look around you.

Can you see any shadows? Can you see the same shadows as your partner, or can you see some different ones? Pause the video here and have a little look around.

So let's do a check of our learning.

Who do you agree with? So Aisha says, "A shadow is formed when objects are put in a dark place." Alex says, "A shadow is formed when objects are put in a hot place." And Jun says, "A shadow is formed when light falls on some objects." So I'd like you to pause the video in here and have a little think about the learning we've just done about shadows.

Who do you agree with? Aisha, Alex, or Jun? And if you finish thinking about who you agree with, I'd like you to have a little think about maybe why the other two people and what they've said may have been incorrect.

Have a think with your talk partner.

Off you go.

Fantastic work, everybody.

Well done.

So Jun is correct.

So he said, "A shadow is formed when light falls on some objects." Did you get the same answer, too? well done, everyone.

So let's move on.

Laura and Andeep come back into their classroom and look out of the window to where the shadow was formed.

So does your playground look a little bit like this one on the screen? Laura says, "My shadow isn't there anymore.

Where has it gone?" Where do you think Laura's shadow's gone? Can you tell your partner? Well done, everyone.

So a shadow is formed when an object blocks light.

So we can see a picture of Laura's classroom here.

Andeep says, "You are no longer outside to block light from the sun and form a shadow." And Laura says, "So, has my shadow followed me into school? I cannot see my shadow now.

Maybe it's hiding under a table." What do you think? Pause the video here and maybe write down some of your ideas on a whiteboard.

What do you think? Where has Laura's shadow gone? Has it just disappeared? What do you think? Fantastic ideas, everybody.

Well done.

So, Andeep says, "When you were on the playground, you were blocking light from the sun so you could see your shadow.

The classroom is much darker so now you cannot see your shadow." So, we know that the sun isn't the only light source.

There are lots of other examples of light sources, and Andeep shines a torch towards Laura.

So we can see here that Laura can see her shadow again, but why does the shadow form? So we can see here that the torch is a light source, and we can see here that Laura herself is blocking some of that light and that is the shape of the shadow.

When light falls on some objects, a shadow is formed on the opposite side of the object.

So we can see here another example.

Our light source here is the torch and we've got the object here, which is a box, and on the opposite side of the box we have the shadow because the object here is blocking the light from where that is.

What I'd like you to do is pause the video here and point to the shadow you see on the opposite side of the box.

If you need to, come a little bit closer to the board.

Great job, everyone.

Well done.

So let's do a check of our learning.

True or false? A shadow is formed when an object blocks a source of heat.

Do we think that's true, or false? Have a little bit of thinking time on your own.

Which do you think? True or false? Excellent work, everybody.

The answer is false.

Now, we need to think about why that is false.

Do we think because A, a shadow is formed when an object blocks a source of light; or B, a shadow is formed when an object blocks a source of sound.

So think back to the learning we've done in our lesson so far.

Why do you think this statement at the top is false.

Have a think with your talk partner.

Super work, everybody.

Well done.

The answer is A.

So we know that a shadow is formed when an object blocks a source of light.

And the examples we've looked for sources of light so far are the sun, but also the torch as well.

Super job, everybody.

Well done.

So let's move on to the next question to check our learning.

When light falls on some objects, there's: A, shadows are formed between the light source and the object; B, shadows are formed behind the light source; or C, shadows are formed on the opposite side of the object to the light source.

So pause the video here, think about which second part of the sentence is correct.

If you need to, go back to the last couple of slides to recap on your learning.

Click play when you're ready to continue.

Super job, everybody.

Well done.

the answer is C.

So when the light falls on some objects, shadows are formed on the opposite side of the object to the light source.

Great work, everyone.

Well done.

So Sam says, "Do all objects make shadows?" So you've got an example here of shadows of jumping children.

Maybe you've done this before at school.

Izzy says, "Remember, an object or material needs to be able to block light from a light source for a shadow to form." What do you think? Pause the video here and have a little bit of thinking time and then share your ideas with your partner.

When you're ready to continue, press play.

Fantastic discussion and brilliant great ideas.

Well done.

So, some materials do not let light pass through them.

What is the word that describes these materials? So we've got some examples here.

We've got a tin, a box of tissues, and a mug.

So pause the video here and have a little think, what is the word that describes these materials? Excellent job, everyone.

These materials are opaque.

Can you say that for me? Excellent job.

So this is another key word for our lesson today.

So as we said, opaque materials do not let light pass through them.

So objects made of opaque materials do not allow light to travel through them.

They block the light and create a shadow.

So we've got some examples here.

We've got a wooden toy cow and we can see that there is the shape of the toy cow shadow has been created.

We've got a tin can.

We can see the shape that tin can shadow behind, but also we can see a jug here and we can see the shadow that has been made.

So these objects are made of opaque materials because they do not allow light to travel through them.

So let's do a quick check of our learning.

Which of these objects is made from opaque materials? So we've got A, a rain gauge; B, a garden fork; or C, plastic bottles.

So have a little think to what we've just discussed about the word opaque and what it means.

Think about which of these objects is made from opaque materials.

What do you think? A, B, or C? Super work, everybody.

Well done.

We can see B is correct.

A garden fork is made from opaque materials because we cannot see through them and it does not let light pass through them.

Well done, everyone.

So let's move on to another question.

Which of these statements is true? A, Opaque materials let light travel through them.

B, Opaque materials let some light travel through them.

Or C, Opaque materials do not let any light travel through them.

What do you think? (Ms. Panchal clears throat) Great job everyone.

The answer is C.

So opaque materials do not let any light travel through them.

Super job.

So let's move on to the first task.

So I would like you to identify and explain which object will create a shadow.

So you've got a kettle, glass, and a jug.

So think back to all the learning we've done in our lesson today.

So I would like you to identify and explain the object which will create a shadow.

If you'd like to, you can write your ideas down on a whiteboard or you can write them in your book with your partner.

Off you go.

Well done, everyone.

The kettle is made from an opaque metal.

It will create a dark shadow when light is shone onto it because it blocks the light from the light source.

Did you get the same answer? Well done.

So let's move on to the next task.

Do only opaque objects and materials create shadows? Jun says, "Use a torch, light box, or other light source to create shadows from different materials and objects." So we've got an example of the setup here.

So the light source that Jun use is a torch, but you could use another light source.

And the object he's chosen is an apple.

Which materials or objects make the darkest shadows? So pause the video here and I'd like you to explore using the demonstration and example on the screen here.

Click play when you're ready to continue.

Great job everyone, well done.

So opaque objects and materials make the darkest shadows because they don't let any light travel through them.

So we've got an apple and a shadow here and we've got a toy flower and a shadow.

Another example here, we've got a glass and a shadow and we've got a glass ornament and a shadow.

Lucas says, "Some objects that are not opaque form faint shadows as they allow some light to travel through them." Did you get the same answers or did you get some different ones? Well done having a good go at this task, everyone.

So, well done for completing the first part of our lesson where we've spoken about and learned about how shadows are formed.

We're now going to move on to the shape of shadows.

So Andeep is drawing what he remembers Laura's shadow looked like when they were playing outside.

So this is Andeep's drawing.

So he's got the sun, he's drawn a picture of Laura, and Laura's shadow.

Andeep says, "This is what your shadow looked like." Laura says, "You've made a few mistakes drawing my shadow." What do you think? Pause the video here.

Do you think there's been some mistakes made in Andeep's drawing? Or do you think his drawing is correct? Pause the video and have a little think.

Excellent ideas, everyone.

So Laura says, "Remember that a shadow is formed on the opposite side of the object, but not the same side as the light source." So Laura has picked up on one of the mistakes that Andeep has in his drawing.

Laura also says that, "Remember that when light falls on some objects, a dark shape is formed.

This means we don't see the features of an object on a shadow.

My shadow should not have eyes and nose and a mouth." So we can see in Andeep's drawing here, that in his shadow drawing that he's got he has included Laura's eyes, her nose, her mouth.

But actually that wasn't the case at all.

Did you spot any other mistakes with Andeep's drawing of Laura's shadow? Laura also says, "I can see that both of my feet are not touching the feet of my shadow.

And shadow must not be drawn separately from the objects." It should be touching the object at all times.

Let's do a quick check of our learning.

Which statement is true about a shadow? A, A shadow shows all the features of an object.

B, A shadow shows some features of an object, such as patterns.

Or C, A shadow does not show the features of an object.

What do you think? A, B, or C? Super job! The answer is C.

So Andeep and Laura go back outside to check what Laura's shadow really looks like.

And this time, Andeep draws around Laura's shadow on the ground.

Maybe you've done this activity at school before.

Laura says, "My shadow doesn't look like that! You have drawn my shadow the wrong shape." So we can see the drawing that Andeep has done is a little bit different to what Laura looks like.

What shapes has Andeep drawn incorrectly? Have a little look.

Excellent.

So we can see how her head looks more like a square.

We can see that her feet, very, very large.

Andeep and Laura go inside.

They shine light from a torch on different opaque objects and look carefully at the shape of their shadows.

So we've got a bottle here that they were looking at.

What shape shadow do you think this opaque bottle will make? What do you think? Great job, everyone.

So Laura says here, "The shape of the shadow looks the same as the shape of the bottle." And we can see that example here.

We can see the bottle and we can also see the shape of the shadow that has been created, and it's exactly the same shape as the bottle.

The shape of the shadow depends on the shape of the object that is blocking the light.

So we can see here a pen.

The shadow that has been created is the same shape as the pen.

We can see here the tub of dough.

The shadow created is the same shape as the tub of the dough.

And we can see a plant in a plant pot here.

We can see the shadow shape created is exactly the same as the plant in the pot.

So Andeep has one final attempt at drawing Laura's shadow correctly.

Laura says, "My shadow is the same shape as me.

There are no features and it is drawn in the correct position on the opposite side of the light source." So we can see here that Andeep has had another go at drawing Laura's shadow.

And we can see that this drawing is much better and is much more accurate to what they saw when they were in the playground.

So let's do a quick check of our learning.

True or false? The shape of a shadow depends on the colour of the object blocking the light.

What do you think? True or false? Super job! It's false.

Now, we need to think about why it is false.

Do we think because A, The shape of a shadow depends on the size of the object blocking the light; or B, The shape of a shadow depends on the shape of the object blocking the light.

Which do you think is correct, A or B? Super job everybody, well done.

The answer is B, The shape of a shadow depends on the shape of the object blocking the light.

Well done.

Let's do another check of our learning.

Match these objects to their shadows.

So we've got a patterned glass, scissors, and a pen.

So have a little think based on what we've done on our learning today.

What shape shadow do you think these objects would have? Click play when you're ready to continue and we'll go through the answers.

Have a little think.

Fantastic work.

So the patterned glass is C, the scissors is A, and the pen is B.

Did you get the same answers? Well done for having a good go.

So let's move on to the next task.

So I would like you to make shadow puppets to explore the shape of shadows.

Use your observations to explain how shadows are formed.

So you'll need the following things: lolly sticks or pencils; paper or card; scissors; and some sticky tape.

Aisha says, "Follow the instructions on the worksheet to find out how to make a shadow puppet." So first, draw the outline of your object.

Then, cut out your drawing and use the tape to attach a lolly stick or pencil.

So use these steps here to then explore different shadow puppets and explore the shape of their shadows.

Off you go.

Excellent work everyone.

So, here you may have done an octopus shadow puppet or you may have done a shark, or maybe you've done some different animals.

What did you observe? An example here answer says, "Because my puppets are opaque, they blocked the light from the light source shining on them and a shadow was formed on the opposite side.

I observed that the shadows were the same shape as the puppets I had made." Did you observe the same thing or did you observe something different? The next part of the task is I would like you to make a shadow puppet and include its features.

Draw what you think the shadow will look like before you test it.

So you'll need some lolly sticks or pencils, some paper and card, scissors, and sticky tape.

So follow the instructions on the worksheet to find out how to make a shadow puppet.

So I'm looking forward to seeing all of your different shadow puppets.

And remember, draw what you think a shadow will look like before you test it.

Off you go, have fun at exploring different shadows and their features, and click play when you're ready to continue.

Excellent work, everyone.

So this child here has decided to draw a dog So they drew the puppet, cut out the puppet, and then attached it to a stick or a pencil in this case.

Draw what you think the shadow will look like before you test it.

So Aisha says, "I think my prediction was accurate.

I didn't include any features and I drew the same outline for the dog and its shadow." Did you get something similar? Well done, everyone.

So, we've come towards the end of our lesson today.

We've done lots of amazing learning all about shadows.

So let's do a summary of our learning today.

A shadow is a dark shape that is formed when an object blocks light.

Opaque objects do not allow light to travel through them.

And shadows do not show features of objects.

And the shape of a shadow depends on the shape of the object blocking the light.

So well done for all of your learning today on shadows.

I know we've covered a lot in our lesson today and I'm so impressed with all the shadow puppets you created as part of the tasks.

So I hope you have a great rest of the day, a big well done again for all you're learning in today's science lesson.

Have a great rest of the day and I'm sure I'll see you next time in the next science lesson.

Ba-bye!.