Сценарий
урока по английскому языку по теме:
"Time Travelling: Pros and Cons"
("Плюсы и минусы путешествия во времени").
разработчик: Антонова Н.В.
учитель английского языка ГБОУ СОШ № 1482
Занятие предназначено для учащихся 7-8 классов средних
общеобразовательных учреждений.
Teacher: We all travel in time. During
the last year, I've moved forward one year and so have you. Another way to say
that is that we travel in time at the rate of 1 hour per hour. But the question
is, can we travel in time faster or slower than "1 hour per hour"? Or
can we actually travel backward in time, going back, say 2 hours per hour, or
10 or 100 years per hour?
Students discuss the possibilities of time travelling, using the
new vocabulary.
Pre-watching discussion
Teacher: It is mind-boggling to think
about time travel. What if you went back in time and prevented your father and
mother from meeting? You would prevent yourself from ever having been born! But
then if you hadn't been born, you could not have gone back in time to prevent
them from meeting. Now I suggest you a vide fragment from a film called "Back
to the Future". (Видео фрагмент из фильма Back to the Future I)
After watching discussion:
Teacher: Take the hand-outs and do
task 1.
Students watch the video fragment
and do task 1.
Task 1. Answer the questions:
1. was Doc so afraid that Martin could communicate with the people
in 1955?
2. What happened with the image of Martin's brother in the photo?
Why did it happen?
3. How did Martin try to improve the situation? Did he manage to
do it?
Task 2. Discuss the following issue
in groups of 3-4.
Do you believe that interference in the past can lead to some
inevitable consequences in the future?
Teacher: You probably know that not
only sci-fi writers have thought about possibility travelling through time and
space but lots of scientists. Now you are going to read the text about
Einstein's theory and do tasks 3 and 4
Task 3. Reading
The great 20th century scientist Albert Einstein developed a
theory called Special Relativity. The ideas of Special Relativity are very hard
to imagine because they aren't about what we experience in everyday life, but
scientists have confirmed them. This theory says that space and time are really
aspects of the same thing—space-time. There's a speed limit of 300,000
kilometers per second (or 186,000 miles per second) for anything that travels
through space-time, and light always travels the speed limit through empty space.
Special Relativity also says that a surprising thing happens when
you move through space-time, especially when your speed relative to other
objects is close to the speed of light. Time goes slower for you than for the
people you left behind. You won't notice this effect until you return to those
stationary people.
Say you were 15 years old when you left Earth in a spacecraft
traveling at about 99.5% of the speed of light (which is much faster than we
can achieve now), and celebrated only five birthdays during your space voyage.
When you get home at the age of 20, you would find that all your classmates
were 65 years old, retired, and enjoying their grandchildren! Because time
passed more slowly for you, you will have experienced only five years of life,
while your classmates will have experienced a full 50 years.
So, if your journey began in 2003, it would have taken you only 5
years to travel to the year 2053, whereas it would have taken all of your
friends 50 years. In a sense, this means you have been time traveling. This is
a way of going to the future at a rate faster than 1 hour per hour.
Time travel of a sort also occurs for objects in gravitational
fields. Einstein had another remarkable theory called General Relativity, which
predicts that time passes more slowly for objects in gravitational fields (like
here on Earth) than for objects far from such fields. So there are all kinds of
space and time distortions near black holes, where the gravity can be very
intense.
In the past few years, some scientists have used those distortions
in space-time to think of possible ways time machines could work. Some like the
idea of "worm holes," which may be shortcuts through space-time. This
and other ideas are wonderfully interesting, but we don't know at this point
whether they are possible for real objects. Still the ideas are based on good,
solid science. In all time travel theories allowed by real science, there is no
way a traveler can go back in time to before the time machine was built.
I am confident time travel into the future is possible, but we
would need to develop some very advanced technology to do it. We could travel
10,000 years into the future and age only 1 year during that journey. However,
such a trip would consume an extraordinary amount of energy. Time travel to the
past is more difficult. We do not understand the science as well.
Actually, scientists and engineers who plan and
operate some space missions must account for the time distortions that occur
because of both General and Special Relativity. These effects are far too small
to matter in most human terms or even over a human lifetime. However, very tiny
fractions of a second do matter for the precise work necessary to fly
spacecraft throughout the solar system.
Teacher:
Read the text and decide whether the following statements TRUE or FALSE
Task
4.
TRUE / FALSE
1.
Scientists didn't confirm the idea of special Relativity.
a)
TRUE b) FALE
2.
The ideas of Space relativity are very hard to imagine because they aren't
about what we experience in every day life.
a)
TRUE b) FALSE
3.
According to the theory General Relativity time passes
more slowly for objects in gravitational fields than for objects far from such
fields.
a) TRUE b) FALSE
4. Scientists proved that the theory of black holes doesn't work
for real objects.
a) TRUE b) FALSE
5. The author is negative about time travelling.
1) TRUE b) FALSE
Task 5. Explain the following
phrases in English
·
special relativity
·
stationary people
·
general relativity
·
worm holes
·
spacecraft
Final discussion
Teacher: Divide into small groups of 3-4
students and discuss the topic: If you had a possibility to travel through time
and space what time and place would you have visited? Why?
Home Task:
Write an essay " Time Travelling:
Real or Fiction"
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