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Integrated Science — First Secondary

Integrated Science — First Secondary

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Question bank: Module 9 — Components and Layers of the Atmosphere

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  • Questions count: 40
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1.
The atmosphere is
a layer of water around Earth
a layer of gases surrounding Earth
the rocky crust
the zone of living things
2.
The most abundant gas in the atmosphere is
oxygen
argon
nitrogen
carbon dioxide
3.
Oxygen makes up approximately what percentage of the air by volume?
0.04 %
0.93 %
21 %
78 %
4.
The percentage of argon in the air is about
0.04 %
0.93 %
9.3 %
21 %
5.
The percentage of carbon dioxide in the air is about
0.04 %
0.4 %
4 %
14 %
6.
Which process adds oxygen to the atmosphere?
respiration
photosynthesis
combustion
rusting
7.
Which process removes CO₂ from the atmosphere?
respiration
volcanic eruption
photosynthesis
burning of fuel
8.
Nitrogen oxides are found in very small quantities because
nitrogen is produced from decomposition
nitrogen molecules have a strong triple bond and are largely inert
nitrogen reacts with oxygen at low temperature
nitrogen reacts with oxygen during rainfall
9.
The bond between the two atoms in a nitrogen molecule is
a single covalent bond
a double covalent bond
a triple covalent bond
an ionic bond
10.
Which gas is a noble gas?
oxygen
argon
ozone
nitrogen
11.
A greenhouse gas among the following is
argon
nitrogen
carbon dioxide
neon
12.
Which is NOT an importance of the atmosphere?
protects Earth from harmful radiation
keeps temperature moderate
takes part in the water cycle
produces tides
13.
The layer of the atmosphere closest to Earth's surface is the
stratosphere
troposphere
mesosphere
thermosphere
14.
Most weather phenomena occur in the
troposphere
stratosphere
mesosphere
exosphere
15.
In the troposphere the temperature decreases with altitude at about
0.65 °C per km
6.5 °C per km
65 °C per km
2 °C per km
16.
If the temperature at ground level is 5 °C, the temperature at the top of a 2 km mountain is
0 °C
1.5 °C
−1.5 °C
−8 °C
17.
The temperature falls in the troposphere with height because
air pressure decreases and rising air expands and cools
the Sun is closer
the air is denser
ozone absorbs heat
18.
The tropopause is
a layer of ozone
a thin boundary layer between the troposphere and the stratosphere
the coldest layer
a part of the thermosphere
19.
The ozone layer is located in the
troposphere
stratosphere
mesosphere
exosphere
20.
The ozone layer extends approximately from
10–20 km
20–40 km
40–80 km
80–100 km
21.
Temperature increases with height in the ozone layer because ozone
absorbs ultraviolet radiation
reflects visible light
absorbs radio waves
emits infrared only
22.
Aircraft prefer to fly in the lower stratosphere because
it is turbulent
air movement is mostly horizontal and stable
it is very hot
it contains clouds
23.
The layer of the atmosphere with the lowest temperature (≈ −93 °C) is the
mesosphere
exosphere
stratosphere
troposphere
24.
Most meteors burn up in the
troposphere
stratosphere
mesosphere
exosphere
25.
The thermosphere extends from about
10 to 50 km
50 to 80 km
80 to 700 km
700 to 1000 km
26.
Temperatures in the thermosphere can exceed
20 °C
200 °C
2000 °C
20 000 °C
27.
The ionosphere is useful for
reflecting radio waves for long-distance communication
absorbing UV
producing rain
providing oxygen
28.
The ionosphere contains many charged particles because
X-rays and gamma rays ionise atoms
it is full of water
it is very cold
it contains ozone
29.
The aurora is produced when
charged solar particles collide with atoms in the ionosphere near the poles
meteors burn up
clouds condense
UV is absorbed
30.
Solar-wind particles are directed toward the poles by Earth's
magnetic field
gravity only
winds
ozone
31.
The highest layer of the atmosphere is the
thermosphere
exosphere
mesosphere
ionosphere
32.
Satellites are placed in the exosphere because
the air is very thin and gives almost no resistance
it is the warmest layer
it contains oxygen
it has weather
33.
Which planet is the smallest in the solar system and has no gaseous atmosphere?
Mars
Mercury
Venus
Earth
34.
The escape velocity for Earth is about
1.12 km/s
11.2 km/s
112 km/s
11.2 m/s
35.
A planet retains a gas if
vrms < ve
vrms ≥ ve
vrms = 0
the gas is hot only
36.
vrms of gas molecules is greater when
the temperature is lower
the molecular mass is greater
the molecular mass is smaller and the temperature is higher
the pressure is lower only
37.
Escape velocity depends on
the mass of the escaping object
the mass and radius of the planet
the colour of the gas
the humidity
38.
At the same temperature hydrogen molecules (M = 2) move about ... times faster than oxygen molecules (M = 32).
2
4
16
32
39.
The thickness of the thermosphere is approximately
30 km
40 km
620 km
700 km
40.
Which layer contains most of the atmosphere's water vapour and mass?
troposphere
mesosphere
thermosphere
exosphere
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