Hello Explorer, welcome along to the smartest show in the solar system. We are touring the universe, finding out everything genius that has ever existed. My name's Dan. It's a new science quest. Thank you so much for being there. It's me, it's you.

It's a tour of our glorious galaxy.

We're uncovering so much smart stuff.

And it's all about your questions this week.

If you ever have anything sciencey that you want answered on this show,

you need to leave it as a voice note for me.

You could do that free Fun Kids app. Find the big record button on my page at FunKidslive.com.

It will come through.

I'll do the dig-in and we'll become science geniuses.

Well, you already are.

But there's always room for growth. First question this week from Orla.

I'm Orla from Norfolk and I want to know why leaves are green? Ora, why leaves green? It's all to do with a pigment called chlorophyll.

pigment, it's a chemical. It helps trees get their energy energy maybe you've heard of photosynthesis where trees

they use carbon dioxide sunlight and water to have energy and then with that they create oxygen

which is what we need for energy so it's a wonderful cycle where us and the trees,

where we help each other. Well, chlorophyll, it's this chemical, it changes carbon dioxide and

water into sugars which feed the tree. So it needs sunlight to do that. And what chlorophyll does

is it reflects back, it absorbs a lot of the energy, but it reflects back the green

light waves from the sun. So the only colour that you're seeing, which is bouncing back from the

sunlight, is green, which is why leaves are green. But they change throughout the year,

don't they? When we move move into autumn the chlorophyll

doesn't really work so the leaves well they don't need it because there's not as much sunlight

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