Lesson video
In progress...Loading...
Hi everyone.
My name is Miss Dhillon.
And last lesson, we were exploring the question.
Why does the U.
K.
have wild weather? And we learned that there are five key air mass is that affect the U.
K.
's weather.
In today's lesson, we will be exploring the question.
What are the reasons for the seasons? This is what the structure of our lesson is going to look like today.
First, we're going to start with star words.
Then we will be looking at the two hemispheres Northern and Southern.
Then you will be learning more about the Sun and the Earth And finally, we will be looking to understand what solar radiation is.
For this lesson, you will need a piece of paper or an exercise book, a pen or pencil, and your brain as you will be doing a lot of new learning in today's lesson.
On the screen, you can see the words which day's lesson.
I will be explaining the star words in more detail throughout the lesson.
Let's start by saying them out loud.
My turn, your turn.
Hemisphere, seasons, Sun, Earth, rotation, galaxy, Milky Way, solar radiation, orbit.
Wow, fantastic! Really well done.
Let's start by looking at the hemispheres.
The Equator, which runs through the middle of the Earth is an equal distance away from the North and the South pole.
The Equator divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
The Northern Hemisphere is the half of the Earth that is North of the Equator.
The Southern Hemisphere is the half of the Earth that is South of the Equator.
Looking at the map, can you tell me if the U.
K.
is in the North or the South Hemisphere.
You can see that it's circled with a red circle.
Say your answer aloud.
Well done if you said the Northern Hemisphere, the U.
K.
is located in the Northern Hemisphere.
The reason not everywhere has the same weather and the weather changes in most places throughout the year, it's because of the Sun and the tilt of the Earth.
The Sun is a star and it is a giant pool of gases that is set in the heart of our Solar System.
The Sun's gravity is what holds the whole Solar System together.
Life on Earth is only possible because of the Sun's energy and its heat.
Our Sun is one of the billions of stars that are in the Milky Way galaxy.
Our planets planet Earth and the Sun are found in the Milky Way galaxy.
Where are they found? Good job in the Milky Way galaxy.
Now aGalaxy is a system of dust gas, dark matter, and anywhere from a million to a trillion stars that held together by gravity.
Now it's your chance to pause the video, to complete the task on the screen.
Here's the answer.
I noticed just the start of the lesson, but I know you're working hard so keep up the good work.
Now it's time for you to complete another recall activity to see if you remember the key facts, pause the video now to complete this task.
Did you remember that correctly? Now a good trick to remember is to remember the Milky Way bar, that is a chocolate bar that could help you remember that we live in the Milky Way galaxy.
Have you ever wondered how hot the Sun is? In this hot summer month of July in the U.
K.
, the average temperature for the month of July is just 21 degrees.
However, on the Sun, just to compare temperatures as hot as 2 million degrees were recorded by NASA's specialist, Parker Solar Probe in November, 2019.
Wow, now that puts in perspective really how hot the Sun is.
The Earth rotates around the Sun once per year.
We can also say that the Earth orbits the Sun, which means it goes on a curved path around the Sun.
Sometimes people think that we have summer when the Earth is closest to the Sun and winter when it's further away.
However, this is not actually true.
Pause the video now to complete the task on the screen.
Here's your answers.
Did you remember that correctly? Well done if you did.
It takes the Earth a whole year to rotate around the Sun.
The Earth axis is the imaginary line that runs through the centre of the Earth.
On one end of the axis is the North Pole.
And on the other end is the South Pole.
Earth is slightly tilted on its axis.
This is what tilted means, it means it's not straight it's to the side.
Earth is slightly tilted or slanted on its axis, as it rotates on its axis.
So the Earth is rotating on its axis, whilst it is going round the Sun.
Tilt means turn to one side and the Earth's axis is tilted at an angle of 23.
5 degrees.
How many degrees? Good job listening, 23.
5 degrees.
Now the Earth spins on this invisible axis at 23.
5 degrees.
This means that the North Pole does not point directly up, it is leaning to a site like in this image.
Every 24 hours, the Earth makes one complete rotation on its axis.
This is what gives us day and night.
The Earth has seasons because of the tilt of the Earth, and also because of the heat of the Sun.
You might be curious and wondering why don't we feel the Earth's rotation and that is a very good question.
The Earth rotates slowly at a time, but we don't feel any movement because it turns so smoothly and at the same speed.
Pause the video now to complete the task on the screen.
Here is the answer.
Remember it takes Earth 24 hours to spin on its axis and that's what's causing day and night, but it takes one whole year to go around the Sun.
So don't get confused between the two.
Now the Earth has seasons because of two reasons.
One the tilt of the Sun and two because of the heat of the Sun.
We will now spend the rest of the lesson, looking at the four seasons winter, spring, summer, and autumn.
Pause the video now to complete the task on the screen.
Did you get the keywords in the correct order? Well done if you did.
Remember that planets and stars are proper nouns and that is why our Sun and the Earth are in capitals.
We have seasons because of the tilt of the Earth.
As the Earth rotates on its axis and as it orbits around the Sun, the axes always points in the same direction.
Throughout the year, different parts of the Earth, get this Sun's direct rays.
In winter in the U.
K.
, the Sun shines indirectly on the Northern Hemisphere.
This means that the Sun's energy is felt less intensely.
Can you point to the Northern Hemisphere on the globe? Good job, okay? You should have pointed to the top half of the Earth.
This makes it much cooler in the Northern Hemisphere, for example, in the U.
K.
, and warmer in the Southern Hemisphere.
This is why we get winter.
Pause the video now to complete task on the screen.
For this task, you can see that there are two options inside the brackets.
You must pick the correct key words to complete the sentence.
Pause the video now.
Did you choose the correct key words? Well done if you did.
Remember the U.
K.
is in the Northern Hemisphere and the reason we get our winter is because the Sun shines indirectly on the Northern Hemisphere, making it much, much cooler.
Now let's have a look at why we get spring in the U.
K.
During spring, the Sun shines equally on both the Northern and the Southern Hemisphere.
This means that the Northern Hemisphere is warming up and the Southern Hemisphere is cooling down.
Pause the video now to complete the task on the screen.
Did you get the correct answer? You should have said it shines equally on both Hemispheres.
Thumbs up if you've got the answer correct.
Now let's have a look at why we have summer in the U.
K.
In summer, the Sun shines directly on the Northern Hemisphere, meaning that the Sun's energy is felt much, much more intensely.
This makes it much warmer in the Northern Hemisphere and cooler in the Southern Hemisphere.
Pause the video now to complete the task on the screen.
How did you do this time? Well done for listening.
I know you're working really, really hard.
Now let's have a look up water in autumn.
In autumn, the Sun shines equally on both hemispheres.
This means that the Northern Hemisphere is cooling down and the Southern Hemisphere is beginning to warm up.
Pause the video now to complete the task on the screen.
Did you get the correct answer? Awesome work to team, that's a lot of new knowledge to take in.
Now, at this point, you might have noticed that during autumn and spring, the Sun shines equally on both hemispheres.
In winter, the Sun shines indirectly on the Northern Hemisphere and in summer, the Sun shines directly on the Northern Hemisphere.
So those are the four key pieces of information that you should now know.
We are now going to talk about solar radiation.
The tilt of the Earth means that where you are on the Earth affects the type of weather you experience.
The Sun's heat and energy is felt differently at different points of Earth.
I'm going to explain solar radiation.
Solar is related to the Sun and radiation is the release of energy.
So that means solar radiation is the energy from the Sun.
What is it? Good, solar radiation is energy from the Sun.
When the solar radiation or energy from the Sun is concentrated over a larger area, it is felt less intensely.
When solar radiation is concentrated over a small area, it is felt more intensely.
This is why the U.
K.
summer is not as hot as Spain summer, or why Russia is winter is colder than Egypt winter.
The closer you are to the Equator, the more intensely you can feel the solar radiation.
Pause the video now to answer the question on the screen.
True or false, solar radiation is energy from the Earth.
Okay, so you should have said false because solar is related to the Sun and not the Earth.
So solar radiation is energy from the Sun, good job.
Pause the video now to complete the task on the screen, use of words at the bottom to help you fill in the missing gaps.
Here are the answers.
Remember if so radiation is concentrated over a larger area, it spreads out, which means if the Sun's energy is less intense, but if it's concentrated in a small area, it is not spread out so the energy from the Sun is felt more intensely.
So those are the two key learnings about solar radiation.
It's now time for you to complete your end of lesson quiz.
Enjoy the rest of your day, everyone and I can't wait to see you again in lesson six, where we will be exploring the question, Why is the world's weather changing? Bye everyone.
