10/12/2017 Newsround

Good afternoon, it's Whitney

here with your Sunday Newsround.

First up, we're talking snow!

More is predicted today

across Wales, the Midlands,

northern and eastern England,

with up to ten centimetres

expected on higher ground.

Weather warnings are also in place

for scotland and Northern Ireland.

And I asked you to send us your snow

snaps while I'm stuck in the studio

and you guys never dissapoint!

First up, Alice and Holly are aged

nine and six from Newport Pagnell.

Here they are with

their snowman, Gorilla.

Looking great.

Look at those teeth!

Jaden is from London

and shares with us his

wintry white back garden.

Daniel aged seven from Rugby says

"Here's the snowman I made

with my sister Hannah."

Loving the outfit on

the snowman guys - I'm

taking some fashionista

tips from that.

Kiran, eight from London,

says, "Watch out...

a snowball from Snaresbrook."

And finally seven-year-old twins Amy

and Fred from London proudly show

the snowman they built this morning.

Thank you so much for

all your pictures and I hope

you all continue to enjoy the snow.

Football news now and it's

a double derby day today

in the Premier League as Liverpool

face Everton with their kick

off in about 20 minutes,

followed by league leaders

Manchester City taking

on second place Man United

in the late kick-off.

City probably go in to

the Manchester match as favourites,

as they're currently eight points

ahead of their Manchester

rivals in the league.

However, United are on a pretty good

run, so what do the fans think

the results of the derbys will be?

We've been finding out.

I think it is going to be

3-1 Manchester City

in the derby and I think

Aguero is going to score.

I think the score is going to be 2-1

to Everton and Wayne Rooney

is going to score both of them.

I think it might be 4-2 to Liverpool

because they've been doing

really good this season.

I think it is going to be 2-1

to Manchester United

because they are the best team

in the world.

I reckon it is going

to be 3-0 for Everton.

I reckon Rooney is going to score

two and Calvert-Lewin

will score one.

I think the score is going

to be 2-1 to Man City.

I think it might be 1-1.

I think the derby is going to be 1-0

to United and the goal-scorer

is going to be Rashford.

The score on Sunday is going

to be 3-1 to Liverpool.

I was really happy when Wayne Rooney

signed for Everton again

because he's a great team player

and it makes a great

change to the team.

I think it is going to be

2-0 but Rooney is going

to bang them both in.

Kevin de Bruyne is City's best

player because he makes

loads of good passes.

I really like Jurgen Klopp

as Liverpool manager

because I like his celebrations

and I like the way

he cheers for them.

I think the score is going

to be 2-1 to Liverpool.

City are pretty good

on the top of the league.

I think City are going to win 10-0.

Jose Mourinho is a really good

manager and he picks

really good teams.

The derby in Liverpool

is going to be very good

because both are winning

teams and everybody loves

to see them play.

Next, we've been asking you to send

us your Big Questions.

Well this week's has been

sent in by Joshua who

is 12 and he asked...

How do we date things in the past?

Well Joshua, here's your answer!

Hello, my name is Bill Sellers

and I'm a palaeontologist

at the University of Manchester.

When you see things in museums,

there's often a date associated

and it's actually really difficult

to work out how old something

is that's very old like that,

and we rely on radioactive decay.

So there are certain elements that

change over time into other elements

and they do that at a fixed rate,

so it's like a clock

slowly ticking down.

Things like carbon, carbon-14,

which means carbon dating,

is great for periods up

to about 50,000 years.

If you do it right,

you can be accurate

to within even tens of years.

It's a really good technique

but for older things like dinosaurs,

carbon dating is no good and we have

to use other elements.

And then things like the decay

of uranium to lead is a really good

clock, and we can use that

for periods of hundreds

of millions of years

and it's accurate to within about

a million years, say.

So, to date things from the past

we have to use radioactive decay

to help us figure out how

old something years.

to help us figure out

how old something is.

Radioactive decay is

when one element turns into

a different element over time.

Elements are teeny tiny

building blocks that make up

everything in the world,

like air, water or humans.

Radioactive decay can

take a long time,

thousands of years!

Scientists know how long it takes

for each element to change.

This happens at a fixed rate,

a bit like a clock ticking down.

So, by looking at fossils and seeing

how many elements have changed,

scientists can work out how old.

Finally, imagine living in a town

where there are more flying

bats around than people.

Well, that's actually happening

in a town in Australia.

Charters Towers in Queensland are

currently dealing with what looks

like a bat invasion.

Residents have complained

about the noise levels

and are trying to deal

with the issue by removing trees

and setting up nets.

That's all from me today.

We'll be back tomorrow morning.

Bye!