Lesson video

Hi everyone, my name is Miss Panchal, and I'm really excited that you decided to join me on this Science Lesson.

So our lesson today is going to be focusing on Plant Life Cycles, and this lesson is part of our bigger unit of learning on Reproduction and Life Cycles, Plants.

Now we're going to be looking at lots of different examples and also doing some secondary research, all about life cycles.

We've got lots of learning to do today.

So let's get started.

So the Outcome for our lesson today is, "I can research and present the life cycles of different plants." So here are some Keywords that we're going to use in our lesson today.

We've got lifecycle, germination, pollination, fertilisation, and seed dispersal.

So what I'd like you to do is pause the video here and take it in turns with your talk partner to read out the definitions to each other.

Once you've done that, click play and we'll continue with the lesson.

Super job everyone.

So our lesson today is split up into two parts.

So the first part of our lesson is going to focusing on flowering plant life cycles.

And then the second part of our lesson is actually going to be looking at how we can find out more information about plant life cycles.

So let's get started with the first part of our lesson.

So Laura has been learning about plants, and Laura says, "I know that animals have life cycles, but do plants have life cycles too?" What do you think? So pause the video here, have a little think on your own in your head, and then I want you to share your ideas with your partner.

So what do you think about what Laura has said? Do plants have life cycles too, or is it just animals? Excellent ideas, everybody.

So plants are living things that grow and reproduce and all living things, including plants have life cycles.

So plants have life cycles just as much as animals do.

Which of these statements is incorrect? So which of these statements is wrong? A, plants are living things.

B, plants are all either carnivores or herbivores.

C, plants are all able to grow and reproduce.

D, plants have life cycles.

So which of these statements is incorrect? What do you think? Great job, the answer is B.

So plants are all either carnivores or herbivores and we know that is incorrect.

So different types of plants have different life cycles, but many have similar stages.

So there are five stages in the life cycle of most flowering plants.

And this is an example of a flowering plant life cycle.

And some of you may have seen examples of life cycles before.

So first, the seeds germinate and begin to grow.

So we can see a diagram here for germination happening.

So we've got the chute, the seed and the root.

Another quick question to check our learning.

What is the name for the life cycle stage when the plant first begins to grow from a seed? Is it A, pollination, B, germination, or C, fertilisation, A, B, or C? Which one do you think? Brilliant, the answer is B, germination.

So that's the first stage.

The next stage in the flowering plant life cycle is growing and flowering.

So we can see here a diagram of growing and flowering, but also we can see an actual picture of some plants growing and flowering.

During this stage, the plants get larger and grow leaves and flowers, then pollination comes next.

This is when pollen from a flower's anther is transferred to the stigma of another flower of the same type.

And pollination can be done by animals or by the wind.

So for example, we've got an animal pollination here by a bee.

But we've also got wind pollination happening as well.

Let's do a check of our learning.

When pollen from an anther lands on the stigma of another flower, it is called, A, germination, B, fertilisation, C, pollination, or D, seed dispersal? Which one do we think is correct? Brilliant job, the answer is C, pollination.

So the next stage in the life cycle is fertilisation, and this is when the pollen moves down from the stigma to the ovary of a flower.

And once a flower has been fertilised seeds form inside the ovaries.

So we can see a diagram here of seed formation in the ovary.

Let's do another check of our learning, just of the stages we've looked at so far.

Which is the correct order? A, pollination, fertilisation, seed formation.

B, pollination, seed formation, fertilisation.

C, fertilisation, pollination, seed formation.

Or D, fertilisation, seed formation, pollination.

Pause the video here and if you need to go back over the last few slides just to recap on the different stages.

Brilliant job everyone, the answer is A.

So you've got pollination, fertilisation, and then seed formation.

In most plants, the ovary of the flower becomes a fruit as seeds form, and the fruit helps to protect the growing seeds from damage.

So the fruit there adds a layer of protection.

Jacob says, "These foods all have seeds inside, but they aren't sweet and juicy.

I don't think they are fruits." Do you agree with him? So pause the video here, have a think on your own in your head, and then share your ideas with your partner, and then with the rest of the group.

What do you think about what Jacob is saying? So he's saying that, "These foods all have seeds inside, but they aren't sweet and juicy.

I don't think they are fruits." What do you think? Excellent discussion everybody, well done.

So if something has developed from a flower and contains seeds, it is a fruit.

And some fruits are things that we don't consider to be fruit in our everyday lives, such as cucumbers, peppers, and pumpkins.

There are also many fruits that we can't eat, such as rosehips and horse chestnut fruit.

So there are quite lots of fruits that actually we cannot eat as well, but there are lots of fruits that we can eat.

Seed dispersal is the next stage in the flowering plant life cycle, and when the seeds are fully formed, they are dispersed away from the plant.

And seeds can be dispersed in lots of different ways, for example, by wind, by water, by animals, or by explosion.

So here we've got wind dispersal seeds, we've got water dispersed seeds, and we've got animal dispersed seeds.

So there's lots of different ways that seeds can be dispersed.

After the seeds have been dispersed, they may germinate and the life cycle starts all over again.

So we've got germination, then we've got growing and flowering, we've got pollination, fertilisation and seed formation, and then we've got seed dispersal.

And then if the conditions are correct, the cycle starts all over again.

So scientific diagrams like this one, are often used to show life cycles.

Now you may have seen a life cycle like this before.

Let's do a check of our learning.

Which diagram would be best to represent a life cycle, A, B, or C? Have a little think.

Brilliant job everyone, well done.

The answer is A.

So we would typically use arrows in a circular motion to represent a life cycle.

So let's move on to the first Task of our lesson today.

So I would like you to explain what happens at each stage in a flowering plant's life cycle.

So we've got the key stages here, germination, growing and flowering, pollination, fertilisation and seed formation and seed dispersal.

So you can choose completely how you would like to present your information and explain the different stages.

So you could draw your own life cycle and then do some paragraphs around the life cycle to explain each stage.

You could create some slides or you could create a poster based on the different stages, or you could actually create a video of you explaining the different stages.

It's completely up to you how you would like to complete this task.

Pause the video here and what I suggest you do is maybe go back over the last few slides, make sure you have a good understanding of each of the stages, and then have a go at the task.

I'm really looking forward to seeing all of your work.

Off you go, everyone.

Super job everyone, well done.

I can see you've worked incredibly hard to explain what happens at each stage of the flowering plant's life cycle.

So here is some example answers.

So in germination the seed begins to grow and then during growing and flowering, the plant becomes larger and grows flowers.

During pollination, pollen is transferred from the anthers to the stigma of a flower either by animals or the wind.

And fertilisation and seed formation is when pollen moves from the stigma to the ovaries where seeds are made.

And lastly, seed dispersal is where seeds are spread away from the parent plant.

So did you get those explanations or did you write some slightly different ones? Well done by having a good go at this task everybody, I know there was a lot of different information to cover.

I'm so impressed.

So we've come towards the end of the first part of our lesson, where we've looked at flowering plant life cycles.

We're now going to move on to finding out more about plant life cycles.

So most flowering plants have similar life cycle stages, but there are some differences between species.

For example, some seeds like cress seeds, can germinate very quickly after only a few days of being in the right conditions, whereas some seeds can take much longer to germinate.

Some types of palm seeds can take three to six months to sprout.

Different types of plants can take different lengths of time to grow and flower and can be pollinated in different ways.

So there's lots of variety within plants.

For example, here we've got animal pollinated flower or we can also have a wind pollinated flowers.

After they are formed, seeds are dispersed in lots of different ways, and we've already spoken about a few of these ways.

For example, seeds can be dispersed by the wind.

Seeds can also be dispersed by animals.

Seeds can be dispersed by water and also seeds can be dispersed by explosion.

So there's lots of different ways that, that seeds can be dispersed.

Let's do a check of our learning.

Which statement is correct? A, all plants have completely different life cycles.

B, flowering plants have some similarities and some differences in their life cycles.

And C, all plants have exactly the same life cycle.

So which statement is correct, A, B, or C? Brilliant work, everyone.

Well done, the answer is B.

So flowering plants have some similarities and some differences in their life cycles.

Great job.

Let's move on.

Sofia says, "There are so many different types of plants, but how can we find out about their different life cycles?" What do you think? Sofia is correct.

There's lots of different types of plants and they all have some similarities, but also some differences in their life cycles.

So how can we learn and find out about all of these different life cycles? What do you think? Brilliant job, so we can find out about the life cycles of different plants by observing them over time.

So that means looking at how they change over time.

And we can make careful observations and measurements of plants as they germinate, grow and disperse their seeds to learn more about them.

So what you can do is if you plant a seed, for example, over time you could watch and take notes of what happens, and that will help you to understand the life cycle better.

But Sofia says, "Plants can take a really long time to grow.

How can I find out more about their life cycles if I don't have a long time to observe them changing myself?" What do you think? So if Sofia doesn't have much time to do her observations and she wants to learn a little bit quicker than the rate that the plants grow, how can she find out more? Excellent job, so we can also learn more about plant life cycles by carrying out research using secondary sources of information such as books, websites, and videos.

So we can have access to all of this information using these different sources.

Let's do a check of our learning.

We can find out more about plant life cycles by, A, carrying out a fair test, B, making observations over time, C, carrying out research using secondary sources, or D, planning a comparative test.

So how can we find out more about plant life cycles? What do you think is the correct answer? Brilliant work, so the answer is B, making observations over time.

But actually also we can carry out research using secondary sources.

So if you wanted, if you had a lot of time then you'd be able to make observations yourself over time.

But if you wanted to learn about different life cycles quite quickly, then you could use some secondary sources like books, websites and videos to help you learn more.

So let's go on to the next Task.

So I would like you to carry out research using secondary sources, so videos, books, websites, to find out more about the life cycles of these plants and complete the table.

So let's look at these two first of all.

So we've got a watermelon plant and we've got okra.

Now a fun fact you, okra is also known as ladies fingers.

So here we've got the table that I'd like you to fill out.

So we've got, Time Taken to Germinate, Flower Appearance, Pollination Method and Seed Dispersal Method.

So I would like you to research the information about the watermelon plant and okra.

Pause the video here, have a go at this Task.

If you would like to, you can print out this slide and you can write in the boxes or you can draw out your own table or write your own notes in whichever way you would like to.

So pause the video, have a go, and I look forward to hearing all the research that you found out.

Wow, everyone, I'm so impressed with all the research that you have taken in order to complete this table.

So let's go through the answers.

So the Time Taken to Germinate for the watermelon was plant was four to 12 days, but for okra, was seven to 14 days.

The Flower Appearance of the watermelon plant was yellow with five petals, whereas the okra is pale yellow flowers with five petals and a dark purple centre.

The Pollination Method for the watermelon plant is animals and the Pollination Method for okra is also animals.

We've got the Seed Dispersal Method for the watermelon plant was animals and the Seed Dispersal Method for the okra is explosion.

So we can see here that between the watermelon plant and the okra, there are some similarities.

For example, the Pollination Method, but actually there are also some differences as well.

I hope you really enjoyed doing your research there.

I can see you've worked really hard to look at lots of different sources of information as well, and I know it can be quite tricky to read all of the information as it can be quite a lot, but I'm so impressed with the work that you've completed.

Well done everyone.

So the next part of this Task, I would like you to draw a life cycle diagram for one of the plants you have researched.

So what I'd like you to do is pause the video here and you can either print this page out, so you've already got the arrows, or you can draw your own arrows in your own diagram.

So pause the video, have a go at doing your own lifecycle diagram, and I'm really looking forward to seeing your diagrams really soon.

Off you go.

Super work everybody, well done.

And I can see you've done excellent drawings, but also you've labelled each stage as well, which is fantastic.

So Sofia says, "Here's my lifecycle diagram.

Is it similar to yours?" So Sofia chose the watermelon lifecycle.

So we can see the stage of germination, then we can see growing and flowering, we can see pollination, then seed formation, and then seed dispersal.

So Sofia's done a really clear diagram here and I really like how she's done a picture for each stage, but also she's labelled each stage as well.

Did your lifecycle diagram look similar or did your one look different? Did you do okra instead? Well done for having a good go at this task everybody.

I know there was a lot of information to cover.

So we've come to the end of our lesson now.

So let's do a recap of our learning.

So we've learned today that plants are living things that grow and reproduce, and flowering plant life cycle stages include germination, growing and flowering, pollination, fertilisation and seed formation and seed dispersal.

So here those are the different stages of a flowering plant life cycle, and we can find out more about plant life cycles by observing them over time or carrying out research using secondary sources.

And secondary sources might include books, videos, websites.

There's lots of different places that we can find out more information about plant life cycles.

Now I'm so impressed with all of your learning today.

You've had a great go at all of the tasks and worked really hard at remembering the different stages of the flowering plant life cycle.

Now, I hope you have a great rest of the day and I'm sure I will see you really soon in the next Science Lesson.

Bye-bye.

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