Browse content similar to 14/11/2017. Check below for episodes and series from the same categories and more!
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Hi, guys, Martin here
with your Tuesday Newsround. | 0:00:12 | 0:00:15 | |
First up, spies, computer
hackers and Russia. | 0:00:15 | 0:00:18 | |
What's going on? | 0:00:18 | 0:00:19 | |
Well, the British Prime Minister
Theresa May has made a big speech | 0:00:19 | 0:00:22 | |
telling off Russia for getting
involved in other | 0:00:22 | 0:00:24 | |
countries' business. | 0:00:24 | 0:00:25 | |
Ayshah has more. | 0:00:25 | 0:00:34 | |
Do you know who this is? Mrs
Vladimir Putin and here's the | 0:00:34 | 0:00:40 | |
President of Russia. He likes to the
Russian people how strong he is by | 0:00:40 | 0:00:45 | |
riding a horse are catching big
fish. We all need a hobby. Spies | 0:00:45 | 0:00:51 | |
around the world are getting fed up
with what they say he is up to. | 0:00:51 | 0:00:58 | |
Those spies are saying that Russia
is using social media to try to | 0:00:58 | 0:01:03 | |
interfere in other countries
including elections. Experts believe | 0:01:03 | 0:01:07 | |
teams of Russian spies are writing
and spreading stories all around the | 0:01:07 | 0:01:13 | |
web that are made to divide people
and cause arguments. They have | 0:01:13 | 0:01:19 | |
thousands of social media accounts
that all shared each other's stories | 0:01:19 | 0:01:23 | |
so the messages go far and wide. It
is like having thousands of digital | 0:01:23 | 0:01:27 | |
spies. So what about Vladimir Putin?
He says he doesn't know anything | 0:01:27 | 0:01:34 | |
about it and if it is happening it
is nothing to do with them or Russia | 0:01:34 | 0:01:39 | |
but not everybody believes it and
lots of leaders want to know if | 0:01:39 | 0:01:44 | |
Russia is a friend but if it could
be an enemy. | 0:01:44 | 0:01:47 | |
Next up and it's "Arise, Sir Mo!" | 0:01:47 | 0:01:48 | |
Team GB Olympic hero Mo Farah went
to Buckingham Palace today | 0:01:48 | 0:01:51 | |
to receive his knighthood
from the Queen. | 0:01:51 | 0:01:53 | |
The long-distance runner
was knighted for services | 0:01:53 | 0:01:54 | |
for athletics and being the only man
to win the 5,000m and 10,000m gold | 0:01:54 | 0:01:58 | |
medal at two Olympic games. | 0:01:58 | 0:02:01 | |
Here at Newsround HQ
we try to answer some | 0:02:06 | 0:02:08 | |
of life's big questions. | 0:02:08 | 0:02:09 | |
So that got me thinking. | 0:02:09 | 0:02:10 | |
And I wanted to know "how do
you measure a mountain?" | 0:02:10 | 0:02:13 | |
Well guess what - smarty pants
here only went and found out! | 0:02:13 | 0:02:16 | |
Mountains! | 0:02:19 | 0:02:21 | |
Mountains! | 0:02:21 | 0:02:22 | |
Mountains! | 0:02:22 | 0:02:24 | |
Lets be honest,
they are pretty huge. | 0:02:24 | 0:02:25 | |
So, how do you measure a mountain? | 0:02:25 | 0:02:28 | |
I'm guessing a giant tape
measure isn't an option? | 0:02:28 | 0:02:32 | |
Well, there are three main
ways that scientists can | 0:02:32 | 0:02:34 | |
try to measure a mountain. | 0:02:34 | 0:02:37 | |
The first way is the traditional
way, in which it uses maths. | 0:02:37 | 0:02:40 | |
Yep, you heard me. | 0:02:40 | 0:02:44 | |
It is useful after all. | 0:02:44 | 0:02:46 | |
Scientists use something
called trigonometry, | 0:02:46 | 0:02:52 | |
which uses triangles to figure out
the height of an object. | 0:02:52 | 0:02:55 | |
For example, they put a point
at the top of the mountain, | 0:02:55 | 0:02:58 | |
at the bottom, and a point next
to it to make a triangle. | 0:02:58 | 0:03:02 | |
Then, by working out how big
the angles are inside the triangle, | 0:03:02 | 0:03:06 | |
it means they can work
out its height. | 0:03:06 | 0:03:08 | |
However, this method
is not super accurate. | 0:03:08 | 0:03:10 | |
The second way uses global
positioning satellites, | 0:03:10 | 0:03:11 | |
or GPS for short. | 0:03:11 | 0:03:16 | |
Like the maps on your phone
or sat-navs in cars. | 0:03:18 | 0:03:21 | |
And it is one of the most
accurate measures. | 0:03:21 | 0:03:27 | |
It involves a team of scientists
hiking up a mountain carrying | 0:03:27 | 0:03:30 | |
a satellite receiver
device with them. | 0:03:30 | 0:03:31 | |
When they reach the top,
a satellite in space can | 0:03:31 | 0:03:33 | |
pick up the location. | 0:03:33 | 0:03:35 | |
However, although it is very good
at figuring out where they are, | 0:03:35 | 0:03:38 | |
it is not so great at figuring out
how high they are. | 0:03:38 | 0:03:48 | |
So the team has to stay in the exact
same spot without moving for around | 0:03:51 | 0:03:54 | |
several hours for the satellite
to collect all the data it needs | 0:03:54 | 0:03:57 | |
to figure out their heights. | 0:03:57 | 0:03:59 | |
But this method takes a long time. | 0:03:59 | 0:04:00 | |
It is a bit tricky to measure
every mountain this way, | 0:04:00 | 0:04:03 | |
which brings us on to... | 0:04:03 | 0:04:04 | |
Method three. | 0:04:04 | 0:04:05 | |
Photogrammetry. | 0:04:05 | 0:04:06 | |
Pretty fancy, eh? | 0:04:06 | 0:04:07 | |
It involves flying over a mountain
and taking lots and lots of super | 0:04:07 | 0:04:10 | |
high quality photographs. | 0:04:10 | 0:04:12 | |
These pictures can then be uploaded
to a computer which uses special | 0:04:12 | 0:04:15 | |
software to create a 3-D model
of the mountain. | 0:04:15 | 0:04:21 | |
From this, scientists can
work out its height. | 0:04:21 | 0:04:23 | |
This means that mountains
in harder to reach areas can | 0:04:23 | 0:04:25 | |
be mapped more easily. | 0:04:25 | 0:04:29 | |
This | 0:04:29 | 0:04:29 | |
So, after all that, we have learnt
that it is really tough work | 0:04:29 | 0:04:32 | |
measuring a mountain. | 0:04:32 | 0:04:35 | |
Now we want to hear from you. | 0:04:36 | 0:04:38 | |
What Big Questions would
you like us to answer? | 0:04:38 | 0:04:40 | |
Head online and send us an idea -
we might have a go at | 0:04:40 | 0:04:44 | |
trying to explain it! | 0:04:44 | 0:04:48 | |
That's it from me guys, Newsround's
back at 7.40 tomorrow morning. | 0:04:48 | 0:04:51 | |
Don't forget to head online to check
out the rest of the days stories. | 0:04:51 | 0:04:57 |