Lesson video

Hi, everybody welcome to your science lessons in year three with me, Miss Roberts.

In the background you might notice there is a knowledge organiser.

It's not all of the facts that you need to know about plants and I'll show you that as we go through the lessons.

So let's go to, we're going to be thinking about what conditions we could change in order to investigate the growth of a plant.

You are going to need a pencil or a pen, a ruler and then a notebook or a piece of paper.

If you need to go and get those, pause the video and go and get them now.

Now I've already mentioned your knowledge organiser which is behind me.

You can also now see the whole thing on the screen.

So this is our knowledge base for the whole of our topic.

You can see that we've got some key information on this side, we've got some key diagrams with our labels.

We've got all the parts of the plant with their functions, description of the process of a lifecycle.

And then also thinking about variables for our practical investigation.

If you want to pause the video and make some flashcards for the information.

You can look up the likeness system and you can make some flashcards so that you can practise that knowledge each day for your learning.

If you want to, you can pause the video now and do that.

So before we get started, I want you to set up your page.

If you've got a notebook like mine with lines, then you can use them.

If you've just got a blank piece of paper that's okay.

I'd like to write the date at the top of the page and then underline it with a ruler and then write plants lesson one and underline it.

It's really important team that we have our books nice and neat with our neat handwriting just like you would use in your English lessons.

So I'd like you to really try and keep your sites really neat.

So pause the video and set your go page now.

Well done.

Okay, we are now ready to get started.

So I'm going to move my face so you can see all the words on the screen.

So these are our star words and I go star words star words star words.

And I want you to repeat to your screen star words star words star words.

Okay are you ready? My turn star words star words star words, Your turn.

Well done, I hope you all did the actions as well 'cause that reminds me that it's time for my star words.

So you're going to follow my mouse and we're going to read these new words together.

I'm going to say them and then I'm want you to tell your screen.

If you want to, you could get your favourite teddy.

Like I've got Lenny here, Lenny the lion.

He helps me with my repeating my knowledge.

So I always have him by my screen so I can tell him all of my new information.

If you want to pause your video and get your favourite teddy you can go and do that too.

Okay team we're ready.

First word is variable, your turn.

Well done, I hope you said it really nice and loud.

So let's say that one again, variable.

You're turn, well done.

This one is control variable.

Your turn, well done.

Independent variable, your turn, well done.

I can see you all being really loud and proud with these now, really confident well done.

This one says dependent variable.

Your turn, well done.

This one says nutrients, your turn, good and record, your turn.

Well done, and practical investigation.

Your turn, have another go at that second word.

Practical investigation, your turn, good.

So that's the new vocabulary that we're going to learn about this lesson.

So keep your eyes peeled.

If you see one of our star words you can put your hands on your head.

So let's see what are we going to do next.

We're going to think about what plants need.

So this is the second part of our lesson.

What are the four things that plants need to stay alive? I would like you to use the picture on the screen to think about the four things that plants need to stay alive.

So I can see a sun in the picture.

I can see a watering can, I can see a little bag with some interesting things I wonder if you could have a think about what that could be.

And this is a little bottle called air, but I wonder if anyone can tell me which gas that specifically is, have a go now team in your books like I showed you, I would like you to write down the four things that plants need to stay alive using the images in the diagram to help you.

Well done for having a go at that team.

So the four things that plants need to stay alive are sun, water, nutrients, and air and the gas that air is that they need is carbon dioxide.

So you can put a tick by all of those four answers if you've got all of those correct or you can change them if you need to.

Okay, so the first science lesson today is all about variables because we're going to do an experiment and I'm going to show you at the end of the lesson, but first of all we need to think carefully about what variables are.

So now we know what a plant needs.

Let's think about variables before we start our experiment.

Okay so team on the right hand side you can see an example experiment that's going to help us understand variables even better.

So at the bottom you can see two blocks on top of which is resting a piece of material.

And then on top of the material is some weight.

And the idea of this experiment is to see how many weights it takes to break the piece of material that's resting on the blocks.

So let's now read together about variables and I'm going to link it to this experiment.

I want you to read with me now team, following my pointer, read nice and loud and proud to your screen and your teddy will be able to hear you as well.

So if you hear a star word remember, put your hands on your head.

Okay let's get ready to read.

A variable, well done is something that we can change in a practical investigation.

What's that word? Investigation, well done.

So when you investigate something then you're finding something out or testing something.

Let's carry on reading together team.

For example, if we want to test the strength of different materials.

We might carry out a practical investigation as shown in the diagram on the right.

Depending on how much weight is needed to break each material, shows us how strong each material is.

So let's now carry on reading.

When we complete a practical investigation we usually want to change one thing.

Now this is our independent variable.

So I want you to just pause there for a second and I want you to say really loud and proud independent variable, your turn.

Oh, I didn't see everybody using their finger for the word independent variable.

Independent variable, your turn, good because you tend to just change one thing.

You just change one thing, well done.

Let's keep reading.

To see what's effect this house on our dependent variable on our dependent variable, well done.

So our action for that is dependent because it depends on the independent material, oh, sorry independent variable.

So your one thing is being depended on.

So can you say dependent variable, your turn, dependent variable, well done.

We're going to build upon that one on the next slide.

So just bear that in mind for a second and let's finish this paragraph with our reading.

To make sure the test is fair we have to make sure everything else is kept the same and these are our control variables.

Now control variables need to stay the same.

They need to stay the, well done.

So this is our action because we keep them the same because we keep them the, good.

And that makes it a fair test and that makes it a.

Wow you guys are so good at responding really loud and proud to your screen.

So let's look on next screen and it's going to explain the definitions of what those variables are, and then I'll link it back to that experiment.

So let's do the actions I'm reading really loud and proud.

Independent variable is the one thing that you change.

Independent variable is the one thing that you change.

I know it doesn't say one here but that's okay.

We're going to do it for now with our one finger.

The next one is dependent variable.

It's a thing you observe or measure.

Dependent variable is the thing you observe or measure.

Can you do the actions with me one last time.

Dependent variable is the thing you observe or measure, well done team.

And last one, control variables are the thing you have to keep the same to make sure it's a fair test.

Let's do that one together again.

So control variables and fair test.

One, two, three, control variables are the things you have to keep the same to make sure it's a fair test.

Well done everyone for reading those really clearly.

So let's just have one more final look at our experiment as the example.

So you can see that the material I wanted to test was the one thing I was changing.

I didn't change anything else.

So that makes it my independent variable.

Ooh, look I put little dot there looks like a little eye, that's good Isn't it? And then my weights are the things that depend on the material, they depend on it and I want to measure how many weights I have to add to not to break it, so that makes it my dependent variable.

And then you can see lots of Cs dotted around.

All of these Cs are my controlled variables and there's lots of them because I need to keep all of the other things that I could change the same.

So this C might be the weather, for instance if it was windy that might affect my material or it might affect things blowing over and that would not make it a fair test.

The blocks need to be made of the same material because if I had blocks made of concrete or blocks made of sponge, that will be a very different experiment and the only thing I want to change is the material.

I don't want to change anything else.

The C here if the control variable represents the width between the blocks.

So if I stand a block here and a block here that's not very far, but if I stand them really far apart then it's going to be a very different experiment and that would not be fair.

And then the control variable here is the height of the blocks, now very, very tall blocks that will be very different to have very, very short blocks that are not very high off the ground.

So I'd have to keep them exactly the same so that it's a fair test.

Well done team, I now feel really clear about what those definitions are for our variables.

I hope you do too.

If you want to pause the screen and read them through again with our actions, remember independent, dependent, and control, then please pause the video and do that again.

Now, before going on to some short little tasks.

So now I would like you to fill in the blanks.

You're going to write this out on your paper with your nice neat handwriting.

It says, what is a variable? So a variable is something that can be blank in a practical blank.

What are the words that should be in those two blanks there? I want you to write out that sentence and fill in the blanks with words that you think should be there.

And then on the next slide, I'm going to show you what the answers are.

So pause the video and fill in the blanks now.

Well done, a variable is something that can be changed in a practical, that was our star word.

What was it, can you tell me? Investigation, well done.

So have a look, this is my book that I just wanted to show you.

So I've still got my date I've got my lesson.

Those are my answers from my first question and then here I've got my nice neat sentence with the blanks filled in.

Don't forget, you've got your capital letter and your full stops at the end, just like you would have in your English lessons.

Okay, so let's have a look.

What we're now going to do is we're going to connect the variables to their correct definition.

So down the left hand side you've got independent variable, dependent variable and control variables.

Then on this side, you've got three definitions.

Can you read them out with me? The things you have to keep the same to make sure it is a fair test.

The thing you observe or measure.

The thing that you change.

I now want you to point with your finger, which of these aren't sorry, which of these definitions go with the variable types? See if you can pause the video and look at the screen now with your finger.

Well done team, I hope you had a good go at that.

Let's see if you are right.

So an independent variable is the thing that you change that's our I, dependent variable is the thing that you observe or measure that's my D, my dependent variable.

And then my control variables are the thing that I have to keep the same.

So independent variable, dependent variable and control variables.

Make sure you've got those in your head before you move on to the next page.

So if you need to team, you can pause the video and have a look at those now.

Okay so now that we've thought about what plants need and we thought about what variables are, we can put them together to think about our experiment.

What variables could affect the growth of a plant.

So if I was going to grow a plant and as you can see on the screen I got my small plant and it's grown bigger and taller and it's grown bigger and taller again.

But what things might affect the growth.

We know that it needs four things.

What are those four things again, what comes from the sky in the bright light.

Well done, it needs sun.

It needs what comes from a watering can? What comes from clouds in the rain? Well done, it needs water, It needs, it needs air well done in the form of carbon dioxide and then we eat food but we would say a plant needs nutrients, well done.

So there's the full things.

So what might affect the growth of a plant? What's about if it didn't have some of those things? I want you to make a list out loud.

You can tell your screen, you can tell your teddy, or if you've got someone next to you, then you can tell them what are the things that might affect the growth of a plant? Well done, I hope you've made a good list of those things.

If you need more time, you can pause the video.

Now I've made a list of all of the things that I think, but there are lots more that you could have had.

So the examples, let me just move this out of the way.

The examples that I thought of would be the amount of water.

If I only watered it a drop each day that might not be enough.

But if I also watered it a lot with the big bucket I might drown my plant.

So that could be something that I could measure and that would affect the growth of my plant.

What about the amount of sunlight as well? If it was really, really bright there might be too much sun, in the window cell that might be just enough.

But if I tried to grow my plant in the cupboard then it would have no light.

And that might be not enough for it to grow.

The other ones I thought of what temperature, size of the pot, the amount of soil, the type of soil and lots, lots more.

I wonder if there was any others that you thought of.

Now, we are not going to do an experiment with a plant and we are going to think about the effect of the amount of water on my plant.

So the amount of water is going to be my independent or my dependent.

Is it going to be my independent or my dependent variable? What do you think if that's the thing I'm going to change? That gives you a clue.

Can you tell your screen? Well done it's going to be my independent variable because it's thing I'm going to change.

It's the thing I'm going to, change good.

So that's my independent variable I'm then going to measure how tall my plant grows.

So is that my dependent variable or is that my control variable? Is that my dependent or is that my control variable? Tell your screen now.

Well done the height of the plant and how tall it grows will be my dependent variable because it depends on how much water I give it.

And then everything else I will need to keep the same.

Well done, so that it's a what test, so that it's a fair test, well done team.

Don't forget if I'm pausing or doing this and thinking, what does she mean? I'm asking you to say it out loud.

Say the answer just like you would in your normal classroom.

So let's have a look, our investigation.

I've talked you through what the investigation is going to be but I'd now like you to write it out using what we've just talked about.

If you need to pause and listen back to the experiment go and have a listen now.

So I would like you to write down the answers to the following questions.

We are going to investigate.

What are we going to investigate? The effect of what on what, what did I just talk about? Something on the something.

I wonder if you can write that as a full sentence, then I'd like to write up our dependent variable.

This was this one, because it depends on this one.

So have a go at writing that sentence, the independent variable that's the thing you change.

Well done, my independent variables, the thing I change, what did I say I was going to change in this experiment? And then our control variables.

I'd like to make a list of all of the things that I need to do to keep the same so that it's a fair test.

So I'm going to just show you what your book.

Oops there's the answers.

Hope you didn't see those ones.

These are the sentences that I'd like to write out from the page before that I've just shown you.

This is what I would like you to, sorry, this is the way I'd like to present it in your books.

So you can see that each sentence is using my nice, neat handwriting.

But then instead of the line that I've written I'd like you to finish the sentence.

So you can use this screen or you can use this screen, whichever you find easiest.

Pause the video and write out about your investigation now.

Okay, so I hope you've had a good go.

Variables are a little bit tricky so if you're not sure if you've left some blank I'd like you to go back and rewatch or even look at the screen that tells you about what variables are so that you can think really carefully.

So here are your answers.

We are going to investigate how the amount of water affects the growth of a plant.

If you need to edit your answer with the green pen then please do that now.

So that you've got what I've written in your book.

Our dependent variable will be the growth of the plant because that depends on the amount of water.

The independent variable will be the amount of water this was my clue remember, the plant gets and our control variables are, here's my list.

You might have some different ones and I could've list a whole host of them but I just listed the main one.

So same type of plant, same size container and the same sunlight.

So at the same amount of sunlight, I mean by that I'm going to keep my plants in the same place.

At the end of this video, you'll see me setting up my plants on the window cell and so that you can have a look.

So don't panic I am going to show you.

I just want to have think about our learning set up first.

So, now that we've about our experiment and you've learned about plants and what they need and you've learned about variables.

I'd like you to now go and do your learning review.

Which are the questions here.

If you want to, you can pause the video and answer those in your book now.

And we'll recap those at the start of next lesson and I'll give you the answers for those.

I'm now going to show you the experiment on what we're about to do to keep watching and make sure you keep an eye on next week to see how tall my plant has grown depending on 'cause it's my dependent variable, depending on how much water I have given both of my plants.

So let's go and have a look team off we go.

Hi team, so here you can see I've got two plants.

I've got plant number one and plant number two.

These are both basil plants and you can see that both of them have a very small amount of plants showing at the top.

So they're about the same size already.

Plant number one, I am not going to water, plant number two, I am going to water a little bit each day.

So that's number two's water for today.

I might give it a bit later as well.

I'm going to do that every day this week.

and then next week we're going to see if there is an observable change in the size of both of these plants.

And we'll see if the water in plant number two helps it to grow better than plant number one who will not get any water.

I can't wait to find out, let's see next week.

Bye team.