Download A mountain climbing team from a certain country was the first team to

Space Travel (1)
F. 2
Name/Class No.
Basic principle and structure of a rocket
Reaction force
(upon the rocket)
Load
Action force
(upon the gas)
Oxidizing agent
(Agent to speed
up combustion)
Fuel
Diagram showing a rocket powered by liquid fuel
1. When the exhaust gas rushes out, the rocket is pushed forward by the
_________________ acting on it. In other words, it makes use of Newton’s
_________________________ to push itself forward.
2. Common fuel used in rockets powered by liquid fuel is _______________. Agent
(or oxidizing agent) that can speed up combustion is ________________.
Space Travel (2)
F. 2
Name/Class No.
A strange story:
A mountain climbing team from a certain country was the first team to climb from the north to
the highest mountain in the world, the Mount Everest. In order to celebrate the occasion, the captain
shot horizontally using his ‘super gun’. A strange thing happened after 83 minutes. The captain was
shot down at his shoulder. It was later discovered that he was shot by a bullet fired from his gun. Can
you explain why this happen?
First cosmic velocity and escape velocity
(3) When the speed of the
satellite reaches 11.2 km/sec,
it will travel beyond the range
of the Earth’s force of gravity.
(2) When the speed of the
satellite reaches 7.9
km/sec, it will move
around the Earth.
(1) If the satellite is
launched at a speed less
than 7.9 km/sec, it will
fall to the Earth
eventually.
In order to fly off into the space, the spaceship must move at a speed greater than 7.9
km/sec.
(I) First cosmic velocity (7.9 km/sec):
If an object is being launched at such a speed, it can move ________________ . It
will not return to the Earth. It will become ______________________.
(II) Escape velocity (11.2 km/sec):
If an object is being launched at such a speed, it can escape from ______________
and fly off into the space.
Space Travel (3)
F. 2
Name/Class No.
Earth’s atmosphere
The diagram below shows the structure of the Earth’s atmosphere. Complete the
diagram by labeling the layers of the atmosphere and the characteristics of each layer
on the diagram below.
Cloud, rain, storm & typhoon Lots of ions reflecting radio waves Ozone layer
Organisms living in this layer The highest altitude an aeroplane can fly
Space starts here Satellites & spaceships begin to be found here
Diagram showing the structure of the Earth’s
atmosphere
Characteristics of each
layer
4. Exosphere
Total
darkness
3. _______________
a.___________________
b.___________________
Meteors
c. ___________________
2. _______________
500 km
d.___________________
e.___________________
50 km
1. _______________
13 km
Air
becomes
thinner
f.___________________
g___________________
The Earth