Multiple choice questions( MCQ and Quiz) of Chapter 2 Class 7 Social Science Geography,
Multiple choice questions ( MCQ and Quiz) of Understanding the Weather,
Class 7 Social Science Exploring Society: India and Beyond MCQ QUIZ,
1. What is an atmosphere?
a) It is the layer of gases that surrounds some planets.
b) Everything that surrounds us.
c) It is water in gaseous instead of liquid form.
d) It is a technique of gathering and analysing information or data.
Answer. a) It is the layer of gases that surrounds some planets.
Atmosphere is the layer of gases that surrounds some planets — in the case of our Earth, we call these gases ‘air’. The Earth’s atmosphere may be compared to a cake with several layers.
2. What is Weather?
a) It is a state of the Earth’s atmosphere at a particular time and place.
b) It is a state of the earth's environment at a particular time and place.
c) It is the layer of water that surrounds the Earth.
d) Everything that surrounds us.
Answer. a) It is a state of the Earth’s atmosphere at a particular time and place.
The weather is a state of the Earth’s atmosphere at a particular time and place.
We use many words to describe the weather — hot, cold, rainy, cloudy, humid, snowy, windy, and so on. They describe the different ways in which we experience the elements of weather.
3. The atmospheric layer closest to the surface of the Earth is called the ----
a) Ozone layer
b) Stratosphere
c) Troposphere
d) Meshosphere
Answer. c) Troposphere;
The layer closest to the surface of the Earth is called the ‘troposphere’, and that is where all land-based plants and animals (including humans!) live and breathe. It is also where almost all weather phenomena.
4. What is the approximate height of the troposphere from the ground?
a) 10 to 15 km
b) 8 to 18 km
c) 6 to 18 km
d) 10 to 18 km
Answer. c) 6 to 18 km
The troposphere extends to a height of 6 to 18 kilometres from the ground; it is less thick at the poles
(where the cold air contracts) and thicker in the tropical zone (where the warmer air expands).
5. How hot or cold the atmosphere is known as ----
a) Temperature
b) Precipitation
c) Atmospheric pressure
d) Humidity
Answer. a) Temperature
How hot or cold the atmosphere is is known as Temperature.
6. To predict or find out in advance of weather conditions is known as ---
a) Statistics
b) Winds
c) Storms
d) Forecast
Answer. d) Forecast
Forecast: To predict or find out in advance (in our case, the weather).
From early times, humans have closely observed Nature and learnt to read her signals to forecast the weather. Observing birds flying low, ants carrying eggs, squirrels gathering nuts, frogs croaking loudly, or even the opening and closing of pine cones, provided valuable information about coming rain or storms. This knowledge has been passed down from generation to generation. Even today, in many parts of India, people use traditional ways to predict the weather, especially the arrival of the monsoon.
7. The systematic study of weather and its evolution is known as
a) Climate
b) Forecast
c) Statistics
d) Meteorology
Answer. d) Meteorology
In the last few centuries, scientists have worked out methods to measure and monitor the elements of the weather with great precision. Based on those inputs, meteorologists try to predict how the weather will behave in a particular region after a few hours or a few days, or even a few weeks.
8. The technique of gathering and analysing information or data is known as ----
a) Climate
b) Forecast
c) Statistics
d) Meteorology
Answer. c) Statistics
. The technique of gathering and analysing information or data in order to be able to detect patterns, understand events, or make predictions is known as Statistics.
9. Which of the following is not an instrument of weather?
a) Temperature
b) Precipitation
c) Atmospheric pressure
d) Climate
Answer. d) Climate
Instruments of weather include temperature, precipitation, atmospheric pressure, winds, and humidity.
10. Any form of water that falls from the sky is known as--
a) Rain
b) Precipitation
c) Sleet
d) Hail
Answer. b) Precipitation;
Precipitation: Any form of water, such as rain, snow, sleet or hail, that falls from the sky.
Sleet: Frozen or partly frozen rain.
Hail: Small, hard balls of ice that fall from the sky like rain.
11. The amount of rainfall is measured with which instrument?
a) Thermometer
b) barometer
c) Rain Gauge
d) Millibar
Answer. c) Rain Gauge
The amount of rainfall is measured with the help of an instrument called a rain gauge (Fig. 2.6). When it rains, the water falls into a funnel and is collected in a cylinder. A scale is attached to the cylinder to measure the depth of rainwater collected.
12. The weight of the air above us, felt on the Earth’s surface, is called ----
a) Temperature
b) Precipitation
c) Atmospheric pressure
d) Humidity
Answer. c) Atmospheric pressure
13. The atmospheric pressure is highest in which place?
a) Mount Everest
b) Tibetan Plateau
c) Gangetic Plain
d) Malabar Coast
Answer. d) Malabar Coast
The atmospheric pressure is higher near the sea coast and lower as we go higher up into the mountains. When you climb a mountain, the air gets thinner than in the plain below. As a result, the air pressure is lower, and there is less oxygen available for your lungs to take in. With less oxygen getting into your blood, your body has to work harder to keep you moving! That’s why people sometimes feel breathless, dizzy, or tired at high altitudes.
14. Which instrument is used to measure the atmospheric pressure?
a) Thermometer
b) barometer
c) Weather vane
d) Millibar
Answer. b) barometer
The instrument used to measure atmospheric pressure is called a barometer. As with thermometers, there are several types of barometers. The unit they display is generally the millibar
(abbreviated as mb). The normal atmospheric pressure at the sea coast is around 1013 mb; a pressure below 1000 mb indicates a depression.
15. Where is the Khardung La located in?
a) Sikkim
b) Ladakh
c) Himachal Pradesh
d) Arunachal Pradesh
Answer. b) Ladakh
Our army personnel serve in high-altitude places like Khardung la in Ladakh, which is over 5600 metres above sea level.
16. Which instrument measures the direction of wind?
a) Thermometer
b) barometer
c) Weather vane
d) Millibar
Answer. c) Weather vane
A wind vane (or weather vane) has a rotating arm with a pointer at one end and a tail at the other. When the wind blows, the tail is pushed, and the pointer turns in the direction of the wind. It responds even to a light breeze.
17. Anemometer is used for the measurement of ---
a) Temperature
b) Amount of rain
c) Moisture in the atmosphere
d) wind direction and speed
Answer. d) wind direction and speed
The simplest instrument to measure the wind direction and speed is the anemometer. It has three or four metal cups that rotate on a vertical shaft when the wind blows — the stronger the wind, the faster the rotation. A meter attached at the bottom counts how many times the anemometer spins in a certain
period of time and calculates the wind speed in kilometres per hour (km/h).
18. The amount of water vapour in the air is called ----
a) Temperature
b) Precipitation
c) Atmospheric pressure
d) Humidity
Answer. d) Humidity
Humidity refers to the amount of water vapour present in the air. It also depends on factors like temperature, wind, pressure, and location.
Humidity of the air is measured as relative humidity: air that would contain absolutely no water vapour (which is impossible in natural conditions) is rated at 0%, while air saturated with water vapour will have a humidity of 100%. In practice, dry weather has a relative humidity range between 20% and 40%, while humid weather usually falls between 60% and 80% relative humidity.
19. A hygrometer is used for the measurement of ---
a) Temperature
b) Amount of rain
c) Moisture in the atmosphere
d) wind direction and speed
Answer. c) Moisture in the atmosphere
20. Water evaporates slowly in
a) Winter Season
b) Summar Season
c) Rainy Season
d) Spring Season
Answer. c) Rainy Season
When water evaporates, it causes a cooling effect. If the amount of water in the air is already high (more
humidity), water evaporates slowly. That is typically the case on a rainy day.
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