Twig Science: How Do Lighthouses Work?
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Video quiz details
Task Description
The learners are going to improve their listening skills and enrich their vocabulary, work with Passives.
Video details
Scene summary
Before the lighthouse existed, going out on the sea was dangerous. In the video we can learn more about lighthouses and how they work.
Video source
Twig Science: How Do Lighthouses Work?Video length
2 minutes 59 seconds
Video genre
Documentaries
Language goals
Other pedagogical goals
Level
The above lesson is a great teaching resource for:Pre-intermediate (A2)
Student type
This resource is intended for:Elementary schoolers
Quality check
Quality not yet verified by the community.
Sensitivity
This resource does not contain any images, words or ideas that would upset a reasonable person in any culture.
Copyright license
This resource is licensed by mermaid72 under the iSLCollective Copyright License.
Upload date
21/08/2022
Video quiz questions (printable)
1. Unmix the sentence.
One
of
the
biggest
dangers
a
boat
faces
is
crashing
into
land
or
underwater
rocks.
2. Correct the wrong word.
Especially in nighttime.
3. Fill the gap.
In ancient times peoplealong the shorelineboats.
4. Correct the wrong word.
But fire light isn't very strong.
5. Fill the gap.
And it doesn'tfar.
6. Unmix the sentence.
It
was
the
ancient
Egyptians
who
first
came
up
with
the
idea
of
a
lighthouse.
7. Choose the correct options.
To .... the visibility of fire light.
improve
increase
invent
8. Unmix the sentence.
The
Lighthouse
of
Alexandria
was
built
around
280
BC.
9. Fill the gap.
At theatower.
10. Unmix the sentence.
A
large
curved
mirror
concentrated
fire
light
into
a
beam.
11. Fill the gap.
That couldseveral kilometres away.
12. Unmix the sentence.
Over
time
lighthouses
were
built
around
the
world,
using
multiple
mirrors
or
reflectors.
13. Fill the gap.
The reflectorsthe brightness of lightlamps.
14. Fill the gap.
Then in 1822 the Frenchman Augustine Fresnellighthouse lens.
15. Unmix the sentence.
A
lens
refrects
light
and
concentrates
it
into
a
beam.
16. Unmix the sentence.
A
glass
lens,
big
enough
to
use
in
a
lighthouse,
would
be
very
heavy
and
very
expensive.
17. Fill the gap.
Fresnel'sa series of grooves onto a lens.
18. Unmix the sentence.
Because
each
groove
was
at
slightly
different
angle.
19. Fill the gap.
Italens.
20. Unmix the sentence.
The
Fresnel
lens
was
just
as
effective
at
focusing
the
light
into
a
beam
as
a
normal
lens.
21. Correct the wrong word.
But because it was more thinner.
22. Fill the gap.
It wasandto manufacture.
23. Unmix the sentence.
Numerous
lenses
concentrated
the
light
into
a
beam
that
was
many
times
brighter
than
its
source.
24. Fill the gap.
Thecould nowby ships more than 30 kilometres away.
25. Fill the gap.
In the 19th century lighthouseslight.
26. Unmix the sentence.
Today
many
modern
lighthouses
use
a
system
of
rotating
lenses.
27. Fill the gap.
So that theappearson and off.
28. Unmix the sentence.
Making
the
lighthouse
even
more
noticable
in
the
dark.
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