Welcome scientists!

A legendary astronomer is lost among the stars,

and we need you to explore space to find them.

Hi, I'm Dalia.

And I'm Alex.

To achieve this task, we need two very important things.

First of all, the well-renowned scientific method.

We start off by making an observation of something interesting.

Then we search the library and the internet

to gather more background information.

After that, we formulate a hypothesis.

That is, we try to describe what we have just observed.

We move on to the experiment itself,

where we gather more data about the underlying physical phenomenon.

And evaluate our hypothesis.

Finally, we disseminate the results and share them with others.

This scientific method will ensure that our work is relevant and accurate.

Secondly, we need a micro:bit.

It’s a small pocket-sized computer with a particular sensor to help us conduct the experiments.

All you need to do is connect a micro:bit to a computer

and create a program to tell the micro:bit what to do for each experiment.

Now let's find our astronomer.

Alright, scientists!

It's time for a treasure hunt.

Pick up your micro:bits and go explore.

Your micro:bit is programmed to receive a signal at a particular radio frequency.

Follow that frequency and you shall find a QR code.

Scan the QR code to find your work station and to open the quiz.

On the work station you will find instructions

on how to program the micro:bit

and to conduct the experiments.

Follow the instructions carefully,

perform the experiments,

program the micro:bit,

and solve the quiz questions.

But first, let's go find those QR codes.

Ah, the Sun.

It wakes us up in the morning, keeps us warm, and helps plants to grow.

But the Sun's radiation is so powerful that it could destroy all life on Earth.

So, Alex, what keeps us safe?

Just as in the case of this magnet,

there's an invisible magnetic field that surrounds our planet and keeps us safe.

Earth's magnetic field has helped navigation for centuries.

And now we have modern tools like the micro:bit to help us measure it.

Now decipher the clues, and answer the quiz questions,

which will help get you closer to finding our astronomer.

Gravity is a force that attracts and keeps things together.

On Earth, it is strong enough to keep most of us from dunking a basketball.

Yet weak enough,

not to break the bones in our legs as we walk.

Did you know that gravity is weaker on the Moon?

That's why astronauts can bounce around on it while they walk.

As you experiment with gravity, try to imagine doing this exercise on the Moon.

It will be so much easier.

Happy exploring astronauts!

Air density depends on temperature.

More dense air sinks down,

while less dense air rises up.

The question is, however, which one is cold and which one is warm?

Think about the gas giants in our Solar System,

like Saturn.

Saturn doesn't have a solid surface like our planet,

but the air is so dense, you could walk on it.

Now, let's learn about heating and cooling of air.

Electromagnetic waves are all around us.

But first, let's focus on sound waves.

Did you know that with our ears,

we can tell from which direction somebody is calling us?

Dalia?

Shh!

These waves are invisible,

but they are all around us on the very planet we live on.

It's time to harness their power by creating our own radar.

Alex, did you know...what’s the nois...

Alex!

I’m sorry?

Do you know what the noisiest planet is in our Solar System?

Planet Earth?

No, it's massive.

Ah, Jupiter!

Did you realise,

that your teacher knows how many of you are in the classroom just by listening?

That's because the power of sound adds up

and our ears are sensitive enough to detect it.

Let's find out how.

Light is made up of multiple colours.

For example,

combine this red light,

with green and blue,

and you will get white light.

Now shine this white light at an object

and it can take on any colour imaginable.

Did you know that Mercury has virtually no atmosphere?

And the grey colour we see

comes from the light reflected directly from its surface?

Thank you for enlightening us.

Now let's learn more about the properties of colour and light.

Well done, teams!

We have found our astronomer.

It's Galileo...

Galilei!

Galileo is well known for his scientific method,

several inventions,

and numerous scientific discoveries,

such as the fact that our planet revolves around the Sun,

which is the centre of the Solar System.

Ah, so that's why he said about the Earth: And yet it moves!

Well, we hope you had a good time and learned a lot.

Just remember, some experiments will succeed,

some will fail,

but it is important that you always continue to learn.