Hello, my name is Mrs. Mehrin.

I am so excited to be learning with you today.

We are going to have a great time learning all about changes in animal life cycles, and we are going to do brilliantly.

Welcome to today's lesson from the "Unit: New life." This lesson is called "Changes in Animal Life Cycles." And by the end of today's lesson, we will be able to recognise different life cycles, the changes that happen within them, and how to record our observations.

Some of the learning is brand new, but I am here to help you, and we're going to be building on some of our previous learning about animal life cycles and different stages of life.

Sometimes learning can be a little bit challenging, but that's great because it means we're going to be working really hard together and learning lots of fabulous new things.

So your outcome for today is to record the life cycle of an animal.

Let's go through our keywords.

We're going to do my turn, your turn.

My turn, animal.

Your turn, my turn.

Life cycle, your turn.

My turn, change, your turn.

My turn, observe, your turn.

My turn, record, your turn.

Fantastic, well done.

We're going to be revisiting these words throughout our lesson today.

But if you'd like to jot them down, you can pause the video here.

Fantastic, well done.

Now our lesson is split into three sections today.

Let's begin with our first one: Animal life cycles.

All animals change as they grow from offspring to adults.

The offspring of a goat is called a kid.

Look at how this kid will change as it grows into an adult goat.

We can record how the kid grows and changes from birth to adult goat in a life cycle.

Scientists use words and pictures to show each stage of life.

So here we have a newborn goat, which is called a kid.

And then we have a growing offspring, and you can already see some of the changes that have happened here.

So the newborn didn't have much fur, whereas the growing offspring has lots of fur, and has grown horns as well.

Now the growing offspring becomes an adult goat, and you can see just how much bigger the adult goat is compared to the kid.

Why do you think life cycles are often presented in a circle? You can pause the video here or I'll give you five seconds to have a good think about it.

Fantastic, really good thinking.

So life cycles are often presented in a circle because it shows that it is continuous.

So newborn offspring grows and changes to become an adult, and then the adult has offspring, and the whole cycle starts again.

So we can observe how this fox grows and changes from birth.

The fox cub is small and fluffy, it's fur is brown.

The young fox is growing, it's fur changes to red.

The adult fox is fully grown, it has a longer tail, legs, and snout.

We can use a life cycle diagram to record how the cub grows and changes from birth to adult fox.

So here we have the newborn offspring, then we have the growing offspring, and finally we have the adult.

Now Lucas and Andeep are talking about animal life cycles.

Lucas says, "I think that all animals have a life cycle." Andeep says, "I think that some animals don't have a life cycle because they are born an adult." She asks, "Do you get a baby bat? Do you get a baby fish?" Who do you think is correct and why? I'd like you to pause the video here and have a really good think about who you think is correct, Lucas or Andeep.

Fantastic thinking, well done.

So Lucas is correct, all animals have offspring which are often smaller and can be different to them.

Bats give birth to pups, and fish have offspring called fry.

So let's check our learning so far.

True or false? A life cycle shows the different stages of an animal's life.

Is that true or is that false? I'll give you five seconds to have a good think about it.

Fantastic, well done.

The answer is true, a life cycle does show the different stages of an animal's life, well done.

Let's see if we can put that into a sentence.

So, "I think this because," A, "A life cycle shows the way in which animals grow and change," or B, "A life cycle shows each year of an animal's life." I'd like you to either pause the video here or I will give you five seconds to think about your answer.

Fantastic, well done.

The answer is A, "I think this because a life cycle shows the way in which animals grow and change." Well done, brilliant thinking.

So, here is your first task.

Do you have a photo of you as a baby or as a toddler? Think about how you have changed in your life cycle from then to now.

I'd like you to draw a self portrait of what you think you will look like when you are an adult.

How do you think you will have changed in your life cycle? I'd like you to pause the video here and have a go at this task.

Fantastic, well done.

So Jun did the same activity and he said, "When I was a baby I was very small.

I had no hair.

I could crawl, but I could not walk." Jun said, "When I'm an adult, I will be taller, I will be stronger, and be able to lift heavy things.

My hair might start to go grey." So here is a self-portrait that Jun has drawn.

And you can see that he's labelled it as well.

So he's put that he thinks he's going to have sturdier legs, bigger feet, longer arms, and a deeper voice.

So, we're moving on to the second part of our learning now: Observing changes in animals.

We can observe how an animal changes throughout its life cycle.

Different animals have different length life cycles.

Some animals have a short life cycle.

The adult stage of a mayfly's life cycle can often last only a couple of hours.

Some animals have a very long life cycle.

Galapagos giant tortoises lay eggs that take about 130 days to hatch.

A giant tortoise can grow and change for over 100 years.

Observing over time means looking closely at something for a few minutes, hours, days, weeks, months, or even years.

Here we have a picture of some children observing insects, and you can see just how closely they are looking at them.

And here we have some children observing plants, and they're using a magnifying glass to help them.

Andeep spot some caterpillars at his local park.

What will help him to observe them to see how they change over a number of weeks? Will, A, the internet help him, B, nonfiction books, or C, a magnifying glass? I'd like you to pause the video here if you need to, or I'll give you five seconds to think carefully about your answer.

Fantastic, well done.

The answer is C, a magnifying glass.

Here is your second task.

I'd like you to look at the life cycle of an ostrich.

I'd like you to write a sentence for each stage to describe how it's changed over time.

I'd like you to pause the video here so you can write some sentences, off you go.

Fantastic, well done.

Now, I'd like you to look at the life cycle of a meerkat, and I'd like you to write a sentence for each stage to describe how it's changed over time.

I'd like you to pause the video again so you can do this, off you go.

Brilliant work, well done.

I can see how hard you are trying.

So let's see what Laura and Izzy said when they were asked to write a sentence for each stage.

Laura says, "After it hatches, I can see that the baby ostrich has very fluffy feathers.

It grows bigger and less fluffy as it gets older.

The adult ostrich has much longer legs and is much bigger than its offspring." Izzy says, "I notice that the patterns on the fur of the meerkat change as it gets older.

It looks less fluffy and has a longer tail when it has grown into an adult." I'd like you to have another look at these two statements.

Are your sentences similar or different to what Laura and Izzy have put? If you'd like, you can pause the video, or I'll give you five seconds to compare.

Fantastic, well done.

So now we are on to the last part of our learning: How can we record an animal's life cycle? Jacob is observing the class tadpoles.

He wants to share what he sees with his older brother.

He decides to record how they change as they grow.

Recording means keeping information so it can be shared with other people.

So, Jacob says, "I would like to record the life cycle I observe, over time, in an interesting way." True or false? Recording means putting things in order.

Is that true or is that false? I'll give you five seconds to have a think.

Fantastic, the answer is false.

Now let's see if we can put that into a sentence.

So, "I think this because," A, "Recording means looking up information online or in nonfiction books," or B, "Recording means keeping information so it can be shared with others." I'll give you five seconds to have a think about your answer.

Fantastic, well done, the answer is B, "I think this because recording means keeping information so it can be shared with others." So Jacob thinks about different ways he could record the life cycle of the tadpoles.

He says, "I could take photos or videos of the tadpoles.

I could draw them each week to use in a life cycle diagram.

I could keep a diary to show how they grow and change." Do you have any other ideas? I'll give you five seconds to have a think, or you can pause the video here and jot down some of your ideas, off you go.

So some other ways that Jacob could record the life cycle observations that he's made of the tadpoles is he could create little sculptures to show how the tadpoles change over time.

Or, he could even create a vlog, a video diary of the changes that he has observed.

So let's do a quick quiz to check our understanding.

So, "We can record our observations of the life cycle of a tadpole by:" A, "Drawing, writing, and taking photos." B, "Talking about what we see," or C, "Getting information from the internet or a book." I'll give you five seconds to think carefully about your answer, off you go.

Fantastic, well done.

The answer is A, "By drawing, writing, and taking photos.

So task C, it's to choose an animal such as a tadpole to observe its life cycle.

You will need to choose how to record this information.

Jacob says, "Try to observe the animal changing over time.

If you cannot do this, then research and record the different stages of the animal's life cycle in an interesting way." So let's have a look at one way in which we could record our observations.

Week one: There is a lot of frogspawn.

They look like jelly circles with tiny black dots in the middle.

Then you might do week three: The tadpoles have emerged.

They are black with a long tail at the end.

Then you may decide to do week nine: The tadpoles have started growing legs and their tails are getting shorter.

Week 14: The tadpoles are bigger and turning into froglets now.

Their skin has become brown and bumpy.

And week 17: The froglets have grown into frogs.

They have four legs and no tail now.

So let's go through the summary of our learning from today.

An animal's life cycle shows us how it grows and changes from birth.

Scientists observe over time, and use these observations to describe how an animal changes during its life cycle.

We can record an animal's life cycle in different ways such as through photographs, videos, drawings, and diaries.

Thank you all so much for your hard work today.

It has been so wonderful learning all about changes in animal life cycles.

You have done brilliantly, well done.