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Study Quiz 7.3
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1

What makes a rocket move upward?
A)an explosion of gas or other fuel
B)the force of hot gases from burning fuel
C)flames from burning fuel
D)hot gases from the explosion of fuel
2

Why is the action–reaction principle important for space flight?
A)It means that rockets are easily manoeuvred.
B)It means that rockets can use the principle to move more quickly than aircraft.
C)It means rockets can fly in space because they don't need air to push against.
D)It means rocket engines can use more oxygen and less fuel.
3

What part of a rocket is the payload?
A)the objects it is carrying, such as cargo, measuring instruments, and astronauts
B)the most expensive parts
C)the non-human components on board
D)the astronauts
4

Robert Goddard designed rocket engines to be built in several sections. What are these called?
A)engine components
B)extra engines
C)spare tanks
D)stages
5

There are engines in a space vehicle that provide extra thrust during launch. These engines burn up all their fuel within minutes, then separate from the shuttle and parachute back to Earth. What are they called?
A)added-thrust rockets
B)payload rockets
C)booster rockets
D)rocket assistors
6

A(n) ____ is a chamber where air pressure can be reduced to match the ____ of space.
A)vacuum / pressure
B)airlock / anti-gravity
C)vacuum / airlock
D)airlock / vacuum
7

Astronauts and other objects inside an orbiting spacecraft seem to float because they are all "falling" together at the same speed. What is this apparent floating called?
A)microgravity
B)arrested motion
C)free gravity
D)micro-motion
8

Radio waves, light waves, X-rays, and microwaves are all types of wave energy. What are these types of waves called?
A)transmitter waves
B)electromagnetic waves
C)electronic waves
D)transporter waves
9

Why are the most extreme environments on Earth good places to start searching for evidence of life in space?
A)There may be alien forms of life in extreme environments.
B)There are no new forms of life on Earth.
C)Exploration in extreme environments helps us to define the limits of life.
D)Extreme environments are disappearing quickly because of pollution and population problems.
10

Conditions on the planet ______ today may be similar to conditions on Earth in the very distant past. This planet may hold clues to Earth's past and future. What is the name of this planet?
A)Mars
B)Mercury
C)Pluto
D)Venus





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