14/11/2017 Newsround


14/11/2017

Topical news magazine for children.


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Transcript


LineFromTo

Hi, guys, Martin here

with your Tuesday Newsround.

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First up, spies, computer

hackers and Russia.

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What's going on?

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Well, the British Prime Minister

Theresa May has made a big speech

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telling off Russia for getting

involved in other

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countries' business.

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Ayshah has more.

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Do you know who this is? Mrs

Vladimir Putin and here's the

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President of Russia. He likes to the

Russian people how strong he is by

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riding a horse are catching big

fish. We all need a hobby. Spies

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around the world are getting fed up

with what they say he is up to.

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Those spies are saying that Russia

is using social media to try to

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interfere in other countries

including elections. Experts believe

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teams of Russian spies are writing

and spreading stories all around the

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web that are made to divide people

and cause arguments. They have

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thousands of social media accounts

that all shared each other's stories

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so the messages go far and wide. It

is like having thousands of digital

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spies. So what about Vladimir Putin?

He says he doesn't know anything

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about it and if it is happening it

is nothing to do with them or Russia

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but not everybody believes it and

lots of leaders want to know if

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Russia is a friend but if it could

be an enemy.

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Next up and it's "Arise, Sir Mo!"

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Team GB Olympic hero Mo Farah went

to Buckingham Palace today

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to receive his knighthood

from the Queen.

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The long-distance runner

was knighted for services

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for athletics and being the only man

to win the 5,000m and 10,000m gold

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medal at two Olympic games.

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Here at Newsround HQ

we try to answer some

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of life's big questions.

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So that got me thinking.

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And I wanted to know "how do

you measure a mountain?"

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Well guess what - smarty pants

here only went and found out!

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Mountains!

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Mountains!

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Mountains!

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Lets be honest,

they are pretty huge.

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So, how do you measure a mountain?

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I'm guessing a giant tape

measure isn't an option?

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Well, there are three main

ways that scientists can

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try to measure a mountain.

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The first way is the traditional

way, in which it uses maths.

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Yep, you heard me.

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It is useful after all.

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Scientists use something

called trigonometry,

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which uses triangles to figure out

the height of an object.

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For example, they put a point

at the top of the mountain,

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at the bottom, and a point next

to it to make a triangle.

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Then, by working out how big

the angles are inside the triangle,

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it means they can work

out its height.

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However, this method

is not super accurate.

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The second way uses global

positioning satellites,

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or GPS for short.

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Like the maps on your phone

or sat-navs in cars.

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And it is one of the most

accurate measures.

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It involves a team of scientists

hiking up a mountain carrying

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a satellite receiver

device with them.

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When they reach the top,

a satellite in space can

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pick up the location.

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However, although it is very good

at figuring out where they are,

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it is not so great at figuring out

how high they are.

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So the team has to stay in the exact

same spot without moving for around

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several hours for the satellite

to collect all the data it needs

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to figure out their heights.

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But this method takes a long time.

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It is a bit tricky to measure

every mountain this way,

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which brings us on to...

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Method three.

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Photogrammetry.

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Pretty fancy, eh?

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It involves flying over a mountain

and taking lots and lots of super

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high quality photographs.

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These pictures can then be uploaded

to a computer which uses special

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software to create a 3-D model

of the mountain.

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From this, scientists can

work out its height.

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This means that mountains

in harder to reach areas can

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be mapped more easily.

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This

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So, after all that, we have learnt

that it is really tough work

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measuring a mountain.

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Now we want to hear from you.

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What Big Questions would

you like us to answer?

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Head online and send us an idea -

we might have a go at

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trying to explain it!

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That's it from me guys, Newsround's

back at 7.40 tomorrow morning.

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Don't forget to head online to check

out the rest of the days stories.

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