Lesson video

Hi, everybody.

Welcome to our second science lesson.

I hope you enjoyed our first science lesson last week, where we learned all about light, and we had the initial question: What is light? Before this video, you should have completed a start of lesson quiz.

If you haven't done that, then you can pause the video now, you go back to the activity before and have a go at competing that quiz.

That's just to help you remember some key information from our last lesson before we move on to today.

So pause the video now and make sure you've completed the quiz.

Okay, fantastic.

So if you've pressed play again, you're ready for this week's video and for this week's learning.

Let's have a look at what we're going to be doing today.

So moving on from what is light, we're going to think about the question: How can we see objects? There are so many different things around us.

How is it that we can see them? How does the eye see those objects? This is the order of our lesson.

So we had a start of lesson quiz.

We're going to then think about seeing objects and how we do that.

Then we're going to have a go at drawing some diagrams to represent how we see different objects.

And then we're going to think about what happens after that and how our brain is involved.

Finally, we will do an end of lesson quiz.

Okay.

So you're going to need three things.

You're going to need some paper.

Plain paper is fine for this lesson.

It doesn't need to be lined paper.

You're going to need a pen or pencil, and you're going to need your brain switched on, especially your science brain.

You are a scientist now.

Can you say, I'm a scientist? Amazing.

Well done.

We are all scientists and we are ready start this lesson together.

Okay, so just a recap from last week.

So there's two pictures that we saw in our slides in our lesson last week.

And this is to remind us of where the light source is in each of these pictures.

Pause the video and tell your screen, where is the light? What is the light source in each of those two pictures? Off you go.

Okay, you're totally right.

The light source in this picture is the sun.

It's coming through the window.

The window is not a light source.

It's coming through the window.

The light source is the sun.

Here, the light source are the? Right, the light bulbs, the lights.

They are the things that are emitting, giving out light so that the lady can see what she's doing.

Finally, then we can see this really straight line.

What does that remind us of? What facts does that remind us of? Light travels in? Great, well done! Light travels in straight lines.

So it comes from a light source, and it travels in a straight line, okay? It's a type of energy that travels in wave form in a straight line, and it can only travel in straight lines.

And finally, the last picture, I'm going to give you a keyword, and I wonder if you can tell me the fact: absence.

Your turn.

Great.

So dark is the.

Tell me the sentence with that keyword.

Off you go.

Amazing, pat on the back.

Dark is the absence of light.

So dark is when there is no light, when there is no light.

Okay, let's move on.

So we're going to think now about how we can see objects.

There are five senses.

You might have learned about the five senses at school or at home.

They are.

and we're going to do actions, are you ready? My turn.

Then your turn.

Smell, taste, touch, sight or seeing, sight and listening.

And today we're focusing in on how we see.

We're focusing in on sight.

Now to see we need two things, two very important things.

To see something, we need light and we need our eyes.

To see something we need? And our? One more time, we need? And our? Right, we need light and our eyes.

You might notice that when there is no light, even though you've got your eyes, you can't see things around the room because there's no light.

Okay, so you need those two things to see.

Now this diagram is going to help us with how we see objects.

So what happens is that light comes directly from a light source.

So here the light source is the sun.

Now what happens is that light, the lights from the light source travels in a straight line.

And you see that straight line and then it is reflected or you could say it bounces off the object.

Okay? So it's come from the light source.

It's travelled in a straight line and it is reflected.

Say it, it is? Amazing.

It is reflected off or from the object.

Then the light travels in another straight line to the eye.

When it gets to the eye, it goes into the eye.

The part of the eye that it goes into is called the pupil.

It's called the? Now you might have heard that word before for students or children are also called pupils, but it has another meaning.

It's the opening in the centre of your eye.

Okay? Pupil.

Your turn.

Okay.

Let's recap that picture 'cause it's really important.

So point on your screen as I talk through, point to where I'm talking about.

Light comes from the light source.

It travels in a straight line to the object.

It's reflected off the object, and it travels in a straight line to go right through the pupil.

Amazing.

Let's see how well you can remember that.

So these are some recap questions to check that we're all thinking and we're all listening really carefully.

They are: What are two things you need to be able to see? Hmm and hmm? What happens when light hits an object? And what is the opening at the front of your eye called? So you need to write down one, two and three on your piece of paper.

I'll leave the questions there.

You need to have a go at answering those questions.

Pause the video now and answer your three recap questions.

Off you go.

Okay, fantastic.

How did you get on? Let's correct them together.

So what are the two things you need to be able to see? You should have written down your eyes and light or in the other order light and your eyes.

It doesn't matter which order.

And we're not too worried about the spelling.

We can work on our spelling in our English lessons.

You need to have had light and your eyes.

Number two: What happens when light hits an object? When light hits an object, it is reflected off the object.

It is reflected off the object, or you could say it bounces off the object, but I like the word it's reflected, it's more specific.

So if you're correcting, you need to write light.

So what happens when light hits an object is the question.

It is reflected off the object.

It is reflected off the object.

You can pause the video now to correct that question answer.

Okay, and number three, what is the opening at the front of eye called? It's called the pupil.

Amazing.

P-U-P-I-L, tick off, it's your third answer.

Off you go, pause if you need to.

Fantastic.

Well done.

Goodness me, you listened very carefully.

Pause and give yourself a pat on the back for some great recap questions.

Let's go on to the next slide.

These are going to be, these are the steps that are followed.

So the first step is that a light source emits or gives out light.

Okay? So this is how we see things.

First thing here is that the light source gives out light.

Emits is a fancy word for gives out, but we need to use it when we're being scientists.

Number two, light travels in a straight line to the object.

Light travels in a straight line to the object.

Number three, light is reflected off the object.

Here, you can see it's reflected off.

It bounces off the object.

And number four, light travels in a straight line to the eye, so that's how it reaches, that's how you see the object.

Four steps.

I wonder, can you pause the video? Can you tell your screen or maybe you can go get a teddy that you can teach to all about light and tell them those four steps using this slide to help you.

Go and get your teddy if you need to.

If not, you can just tell your screen, pause the video now and do that.

Okay.

Fantastic.

I hope you've managed to say those four steps of how our eyes see objects.

Okay.

Next activity.

Now this was my turn and you're going to have a go at doing this in a minute with the steps that I give you.

We're going to be drawing diagrams for how we see objects.

Listen really carefully to how this one was done.

The first step is to draw the light source.

Okay? The first step is to draw the light source.

The next step is to draw the light travelling in a straight line to the object.

The next step is to draw the light bouncing off the object or being reflected off the object.

The next step is to draw the light going in a straight line to the eye.

And finally, we draw the eye.

Now, the , amazing, the pupil, where it goes through.

So that's an example.

I'm going to have to go first and then you're going to have one.

Here are our steps.

Okay, step number one is draw your light source.

I'm going to do it first.

Okay.

Step number one, draw my light source.

Step number two, draw the light ray travelling to your object.

Now this is going to be a straight line.

So if you've got a ruler or something straight, then you should use that to help you.

Step three, draw the object.

I'm going to choose a book.

It could be any object, Miss Emms is choosing a book.

Step number four is draw the light ray reflecting off your object, again in a straight line 'cause light can only travel in straight lines.

And step number five, draw the light ray travelling to your pupil.

So first of all, we've drawn it reflecting off the object.

Then we've drawn it travelling to the eye and going into the pupil.

Let me show you mine.

It can be a really simple picture.

Okay, so I've got my light source, which is the sun.

And I'm going to suggest that you choose the sun as well.

My light going in a straight line to my object.

Miss Emms is not very good at drawing a book.

This is a book.

That's the object that I chose.

Then my light going in a straight line, straight into the pupil, the opening in the centre of the eye.

That's my diagram.

It's your turn now.

Let me read the steps out to you.

Make sure that you've got your paper and your pen ready.

You should need a clean piece of paper or clean page.

Okay, step one.

Draw your light source.

Everyone needs to draw a little picture of the sun.

Pause the video and off you go.

Fantastic.

Well done for drawing your light source.

Step two, you need to draw the light ray travelling to your object.

So get a ruler or something really straight and draw a small line for the light ray travelling to your object.

Pause the video and do that now.

Fantastic.

Well done.

Okay.

Step three.

You need to draw your object.

I chose a book, the diagram before showed an apple.

It's anything we see.

You can choose any object you want to.

Draw your object now, pause the video.

Wonderful.

Well done.

Okay.

Step four.

You need to draw your light ray reflecting off your object.

So going onto your object and coming off it again, going onto your object and coming off your object.

It's reflected off your object.

Do that now.

Pause the video.

Well done.

And finally, your fifth step is to draw the light ray travelling to your pupil, okay? So you're going to have to draw a straight line, and then the eye and the light ray going into the pupil.

Off you go.

Fantastic, you needed to pause the video at that last bit.

If you haven't done step five, can you pause and do that now? Okay.

Amazing.

Well done.

I wish I could see them.

If you'd like me to see them, I'll show you how you can do that at the end of the lesson, because you saw mine and I'd love to see yours as well.

Okay, amazing.

Well done on your diagrams. Let's go onto the next thing.

So the final thing that's really important for us to learn is about what happens when the light hits your eye.

So we've learned about how the light gets to your eye.

This image is taken from BBC Bitesize, and it's really helpful in showing us how the light, what happens when the light hits our eye.

And so it comes in a straight line to our eye, and it enters through our pupil.

Without actually touching it, point to your eye, your pupil, the centre, the opening in the centre of your eye.

And what happens is it goes through your eye.

And your eye, how clever of your eye, sends signals to your brain and your brain then registers that it's seen that object, but it all happens so quickly that we see the object straightaway, quickly like a click.

Okay, so I'm going to repeat that.

You can point on your screen to what I'm talking about.

So the light goes into the pupil.

It goes through your eye, and the light sends signals.

Show me signals, amazing.

The light sends signals to your ? To your brain.

Well done.

And your brain registers that you've seen that object.

Wow, you've done some amazing learning today.

I'm really, really proud.

Now, when I finish with my video, there's a quiz which is the next activity.

It's a multiple choice quiz, so you have to read the question carefully and tick or click on the right answer, okay? And then you need to submit your quizzes.

I am super impressed with how well you've done today.

Well done.

You don't have to do this, but if you would like to show, I've said your writing, but it's more your diagrams and the work that you've done from this lesson.

If you'd like to show that to me, then you can ask your parents or carer to share it on Twitter @OakNational with #LearnWithOak.

You don't have to do that.

You could keep it for yourself because you're really proud of it, or you could go and show it to somebody in your home.

Excellent learning today, everybody.

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

Bye-bye.