23/02/2018 Newsround


23/02/2018

Topical news magazine for children.


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Transcript


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Hi, I'm Ricky and this

is your Friday morning Newsround.

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Keep watching for all this...

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How science makes

fireworks go with a bang.

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Plus the coolest ride to

the bus stop ever...

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First, some of the world's most

endangered animals including

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leopards, wild bore,

chimps and golden cats have been

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captured on camera in Nigeria.

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Take a look at these...

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Caught on camera in the remote

forests of Nigeria's largest

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national park. Red river hogs. The

Golden cat. This is home sue some of

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Africa's most endangered animals.

Conservationists are using hidden

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cameras to monitor them.

You go

through a lot of camera images and

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it can be quite a tedious process. A

leaf blowing in the wind and you

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don't see a great deal and then you

will get a gem like a Golden cat.

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Perfect shot and you are handling

and you were not sure they were on

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site and there it is in detail.

Chester zoo researchers are working

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with local park rangers to help

protect wildlife. This park is home

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to a rare breed of chimp found only

in Nigeria and Cameroon next door.

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With just a few thousand left in the

wild, these pictures raise hopes the

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great ape can avoid extinction.

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Over at the Winter Olympics

a 15-year-old figure

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skater has won gold.

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Alina Zagitova topped the scoreboard

with this performance,

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narrowly beating her Russian team

mate to take the top prize.

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It's the first gold won

by Olympic Athletes from Russia

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at the games so far.

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Next to curling and Great Britain's

women have a massive

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game this morning.

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They knocked out defending champions

Canada a couple of days ago,

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and today take on Sweden

in the semis.

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If Eve Muirhead and her team can

win, they'll go for gold on Sunday!

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We are open to any team. We had a

very close game against Sweden in

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the round robin. We defeated them in

the European final and we have close

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games when it comes to the play-offs

against them.

We will go away and

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regroup for the semifinals and come

back as strong as we can.

Well

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excited about that.

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Dr Tom has the answer

to an explosive question ?

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how are fireworks made?

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Dr Tom is an expert,

so please do not try this at home.

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Hello, I am Dr Tom,

a fireworks expert.

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I am here to answer the big question

this week, which is from

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Rees in Cambridgeshire

and it is how fireworks made?

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A firework is a lot of different

chemical reactions.

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To make colours we add metal salt

to the firework mix.

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So strontium salt to get red.

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This to get green.

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Sodium salts to get yellow.

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And to get blue, the

most difficult colour

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of the lot, you add

copper salt to the mix.

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What you packed into the fireworks

to make it effective are

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called stars.

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This is a star.

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This will burn the violet

and in the middle it changes

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the composition and burns

with silver sparks.

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About the size of

a pea and hundreds of

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them are in a firework shell.

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Black powder or gunpowder

as some call it

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is one of the key ingredients.

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It has two purposes.

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Sometimes to produce

gold sparks of long

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duration flowing down

to the

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ground and making it look pretty

but more often as a propellant

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to shoot a shell into the sky

or to motor a rocket.

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Firework sounds like

whistles and screeches are

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made from different

types of chemistry.

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We press a tiny band of this

composition into the bottom of

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the tube and in the rest of the tube

it acts like an organ pipe to

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amplify the sound and make

a really loud sound.

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This is a firework mortar.

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It is what is used to fire

the fireworks into the air.

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We have hundreds and

hundreds of these added

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together and the shell goes in here.

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The bottom part is for the black

powder to propel the shell into the

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air and the top part

is full of the stars

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making the big burst of

colour in the sky.

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Kids at a school in Norfolk have

been told they are not allowed

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certain hairstyles. Extreme haircuts

like this one are deemed

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unacceptable. The headmaster sent a

letter to parents saying students

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not following the rules could be

sent home or excluded.

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We want to hear YOUR

views on this one.

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Get online and join

in with the vote.

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Finally, more news from Pyeongchang,

but not from the snow and ice.

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Take a look at how this guy makes

his daily journey to the bus stop.

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This is Team GB snowboarder

Billy Morgan making his way

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from the Olympic Village

to the slopes in pretty

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impressive style.

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Team mate Jamie Nicholls caught him

on camera as he pulled tricks

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on his scooter on his way

to the athletes bus.

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He goes in the final

of the Big Air tomorrow.

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With balance like that

he's sure to win gold!

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That's it for now.

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