Lesson video

Hi everyone, I'm Miss Harris and welcome to today's science lesson.

How are you doing today? Good.

I'm glad to hear it.

Now, today we are learning all about which families are invertebrates.

So we're going to look at different groups of animals to find out why they are invertebrates.

Now, remember an invertebrate is an animal which does not have a backbone whereas last lesson we were looking at the differences between invertebrates and vertebrates.

Vertebrates have a backbone.

Invertebrates do not have a backbone.

So my background today is a forest.

At the end of the lesson, can you tell me one living thing which lives in the forest? Is that okay? Perfect, now let's find out what else we're going to be learning about today.

We are going to be learning about what are invertebrates.

We're going to do a recap.

We're going to learn about crustaceans, arachnids, and insects.

Then we've got an end of lesson quiz where we can show off everything that we have learned today.

To complete today's lesson, you will need an exercise book or a piece of paper, a pencil, a coloured pencil, and most importantly, don't forget it, your brain.

If you've left your brain in the other room or you've forgotten it, you can pause the video now and go and get it and anything else here that you might need.

Now we can get started.

So let's practise our star words.

I'm going to say it, then I want you to say it out loud to your screen.

Do you think you can do that? Okay, ready? Living things.

Insects.

Backbone, can you feel your backbones? Put your hands round your neck like this and then lean forward.

Can you feel all the boney bits? That's your backbone because we have backbones.

Invertebrates.

Vertebrates.

Arachnids.

Crustaceans.

Well done.

Now let's do our brain warm-up.

I am going to describe an animal, which you can see here, and I want you to try and find it.

Are you ready? The animal Miss Harris is thinking of is white.

It can fly.

It has feathers, not fur.

It has a sharp beak.

It has sharp claws to grip onto branches.

And the sound that it makes sounds like this.

Which animal is Miss Harris describing? Can you point to it? The animal Miss Harris is describing is a, a snowy owl in the top corner.

Did you find that it was a snowy owl? Well done.

Now let's recap what invertebrates are.

So an invertebrate, I'd like you to follow with your fingers, put your finger on the first one, an invertebrate is an animal which does not have a backbone.

It does not have a backbone.

They are either soft, they either have a soft body, sorry, like worms or jellyfish, or they have a hard casing covering their body, like spiders and crabs.

So let's recap.

Invertebrates are animals which do not have a backbone.

They are soft like worms and jellyfish, okay? Or they have a hard outer casing covering their body.

It's hard, you can tap it like this, like spiders and crabs.

Now let's recap using Miss Harris's bowl of jelly so that we can see what Miss Harris means by a hard casing covering their body.

So I've got a bowl here of jelly.

Now, the reason I'm using a bowl of jelly to show what an invertebrate is, see, it's because jelly is soft and squishy like the inside of an invertebrate.

Now, they do not have a backbone so they either have a soft body like worms and jellyfish or they have a hard outer casing of their body like spiders and crabs.

So first I'm going to show you, I'll just tip my jelly upside down, it's going to the shape of my bowl.

Okay, so, push that together, so here I've got my jelly.

This is what a jellyfish might look like, and a worm, we know that a worm is a long shape, but the jellyfish body looks like this.

It's really squishy and we can poke it.

Now, an invertebrate does not have a backbone so it's going to be nice and soft like this.

An invertebrate might look like this or it might have a hard outer casing.

So I can touch the jelly like this if it's a jellyfish or worm.

But if I put my bowl back over the top, can I get to the jelly now? Can I touch the jelly? I can not touch the jelly because my bowl represents the hard outer casing of an invertebrate.

So I'll put it back down.

Can I get to the jelly? No, but if I lift it up, I can.

So it's either like this, a soft body, or it has a hard shell like this over the top.

So that is how jelly represents an invertebrate.

So here we have got our two categories of animals, invertebrates and vertebrates.

Which category of animals are we learning about today, vertebrates or invertebrates? Invertebrates.

You're right.

And these are the groups of animals which we are learning about today, crustaceans, arachnids, and insects.

Here's a pause point.

What do invertebrates not have? Invertebrates do not have a backbone.

Well done.

Okay, so let's start learning about crustaceans.

Can you say that word? Crustaceans.

Can you whisper it? Crustaceans.

Can you shout it really loud? Crustaceans.

Is someone in your house? Were they a bit scared? Shall we do it one more time? Crustaceans! Good job.

Now, crustaceans are types of animals which have a hard outside shell.

So just like the jelly, if we have a closer look, just like the jelly, we can see here the crab has got a hard shell.

Just like when Miss Harris put the bowl over the jelly, that's what the crab's body is like.

It has a hard shell on the outside.

They have jointed legs and one whole body.

So jointed legs means that they can bend.

So if you look at Miss Harris's arm, I have a joint, you have a joint in your arm like this so that we can bend it.

We have them in our wrists, in our legs, in our arms. We can move all of our body parts.

Can you just wiggle all the way around? Even our fingers have lots of joints so that we can bend them, yeah? So that's what crabs have.

They have jointed legs.

So you can see if you look closer, their legs can bend, and you can see here, it's almost like they've got little knees and they have one whole body.

How many bodies do they have? One, one whole body.

They've got their body and then they've got their legs, just like us, we have one whole body and then we've got our arms and legs.

Now, in your books, I would like you to draw some pictures to remember some facts about crustaceans.

So the first one here, we can see we have got a hard outside shell.

So that's the first one you could draw.

Then they have got jointed legs and one whole body, like a crab.

Can you pause the video and draw these pictures to remember three facts about crustaceans? Now, you can choose if you want to draw them, or even better, could you write the facts? Hard outside shell, jointed legs, one whole body.

Pause the video.

Do that now.

Well done.

Now here are some pictures of some crustaceans.

We have got a lobster, a shrimp, and a crayfish.

In your books, can you choose two crustaceans and draw them and label them? Do that now.

Well done.

Now we're going to learn about arachnids.

Can you say that word? Arachnid.

Arachnid.

Can you whisper it? Arachnid.

Could you say it like a robot? Arachnid.

Good job.

Let's find out what an arachnid is.

So, follow with your finger.

An arachnid is a type of animal which has a hard exoskeleton.

They have fangs and have two parts to their body.

How many parts? How many parts does the crustacean have? One part.

Arachnids have how many parts? Two parts, good job, and they have fangs as well.

Can you make fangs with your hands? Good job.

So they are, they have a hard exoskeleton.

What does that mean? What's an exoskeleton, Miss Harris? An exoskeleton is a hard skeleton on the outside of its body which helps to protect the animal.

And as a spider grows, it will shed its exoskeleton.

It's almost like taking off a coat it's been wearing for a really long time.

And their new exoskeleton will harden over time so that they can grow bigger and prepare for their next stage in life.

So an exoskeleton is there.

It's a hard skeleton on the outside of its body to protect the animal, and over time they grow out of it.

They get too big so they need to shed it.

So you can see here, the brown one is its exoskeleton.

So once it's shed its exoskeleton, a new one will grow and it will harden on the spider.

Goodness me, so that's arachnids.

They have an exoskeleton.

They have two parts to their body and they have fangs.

Here is a spider.

These are the three facts that we know about arachnids.

There have two parts of their body, they have fangs, and they have an exoskeleton.

In your book, can you draw a picture of this spider and label the parts of it using the words on the other side? Pause the video and do that now.

Well done.

Let's check whether we've got the right answer.

Can you pick up your coloured pen or pencil? Get ready to tick or fix.

So a spider has two parts to its body.

It has fangs and it has an exoskeleton.

Well done.

Give yourself a tick if you got those right.

If you didn't, don't worry.

You can pause the video and write the correct answer now.

Great work.

So let's write some facts about arachnids.

So here I have got some sentences and I would like you to fill in the gap.

So the first one says, an exoskeleton provides mm.

So you look at the words at the bottom.

Does it provide protection? Does it provide harden? Does it provide outside? Hmm, pause the video, write that sentence down and fill in the gap.

Well done.

Ready for number two? Exoskeleton will mm over time.

An exoskeleton will mm over time.

Pause the video, fill in the gap.

And the last one, an exoskeleton is a hard skeleton on the mm of an animal's body.

Pause the video, write that sentence down and fill in the gap.

Now pick up your coloured pen or pencil.

We are going to check whether we've got the right answers.

Ready? So an exoskeleton provides product, protection.

Give yourself a tick if you wrote protect, protection.

Sorry.

I keep saying it wrong.

Protection.

Number two, an exoskeleton will harden over time.

Good, and the last one, an exoskeleton is a hard skeleton on the outside of the animal's body.

If you got any of those wrong, don't worry.

You can pause the video now and check your answers.

Well done.

Now, here is our pause point.

How many parts does an arachnid's body have? Does it have one part, two parts, or three parts? Can you pause the video and point to the right answer? Are you ready? An arachnid has two parts to its body.

Well done.

A crustacean has one part.

Okay, let's do our last animal, learn about our last animal family, which is insects.

So follow with your finger.

Are you ready? An insect has a hard exoskeleton like arachnids and they often have fangs and three parts to their body.

So they have a hard exoskeleton, have fangs, three parts of their body.

How many parts? Three, good.

What insect is this? It's an ant, you're right.

But when we see ants, normally they're really teeny tiny.

So this is what they look like close up.

Shall we count whether this insect has three parts to its body? Let's check.

Ready? One part.

Two parts.

Three parts.

Can you see the fangs at the front of the ant? You can.

Oh, goodness me.

Now, some insects have something called an antenna.

Now, these are the two things that stick up or sometimes they flop a little bit like this at the top of an insect's head.

Now, they use their antenna to touch and smell the world around them, so they can touch and smell things.

Can you put two fingers on top of your head like this? I'm going to come close to the camera, and we have to try and touch and smell things like this.

Can you try and touch and smell things with your antenna like an insect? Well done.

So let's draw and write some facts about an insect.

What insect is this? It's a ladybird.

You're right.

So here, some insects have wings, they have an antenna, and they have three parts to their body.

In your book can you draw a picture of a ladybird and label the three parts of its body? Label the three facts, sorry.

It has got three parts to its body.

Great work.

Let's check whether we've got the right answer.

Pick up your colour pencil or pen.

So we've got wings, antenna, and three-part body.

Great job.

Now here are some pictures of some insects.

We've got a butterfly, a dragonfly, a fly, a cricket, and a wasp.

Can you draw three insects of your choice and make sure you label them.

Pause the video and do that now.

Excellent.

Well done.

Now we're almost at the end of our lesson but I would like you to tell me, here we have learned about three animal families.

Can you tell me which animal family has which, each animal family has got different parts to its body, different amounts.

Can you tell me which animal family has got each of these numbered parts? So how many parts of the body does an insect have? How many parts of the body does a crustacean have? How many parts of the body does an a arachnid have? Use your finger to connect the animal family to the amount of body parts.

Do that now.

Let's check.

So crustaceans have got one part to their body.

So the crab.

Arachnids have two parts.

So the spider.

And insects have got three parts to their body, the ant that we looked at.

So today we have learned about three animal families which are invertebrates.

We've learned about crustaceans, arachnids, and insects.

Next lesson, we're going to learn about some animal families which are vertebrates.

I can't wait.

So it's time to complete your end of lesson quiz but before you do that, can you tell me one animal which lives in the forest? Yeah, you're right.

Great.

Hmm, what animal do I think of? Hmm, deer live in the forest.

So do squirrels and lots of different types of birds and lots of insects.

Did you have something different? Great.

Now, great job today.

You have worked super hard and I'm really impressed by all the knowledge that you've learned today.

I hope you have a wonderful rest of your day and I will see you next time.

Shall we finish off the lesson by doing a rainbow cheer? Let's hold your hands out like this and we're going to make a rainbow in our hands like this.

Watch.

Ready? Can you have a go at doing that? Ready? Three, two, one, go.

Well done.

See you next time.