Question 1.
Which gas released in the atmosphere creates a greenhouse effect trapping the heat?
(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen
(d) All of these
Answer
Answer: (a) Carbon dioxide
Question 2.
Excess amount of CO2 is responsible for
(a) global cooling
(b) global warming
(c) both (a) and (b)
(d) none of these
Answer
Answer: (b) global warming
Question 3.
What are the important objects for survival of plants and animals?
(a) Rainfall
(b) Sun light
(c) Oxygen
(d) All of these
Answer
Answer: (d) All of these
Question 4.
Which one of the following gases is present in the atmosphere in the highest amount?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Lithium
Answer
Answer: (c) Nitrogen
Question 5.
Which gas is used by the green plants to make their food?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) None of these
Answer
Answer: (b) Carbon dioxide
Question 6.
Which is the important gas used by human beings for breathing?
(a) Nitrogen
(b) Carbon dioxide
(c) Oxygen
(d) Sodium chloride
Answer
Answer: (c) Oxygen
Question 7.
When the air is heated it becomes
(a) Lighter?
(b) Heavier?
(c) Colder?
(d) None of these
Answer
Answer: (a) Lighter?
Question 8.
What is the average height of the troposphere?
(a) 3 km
(b) 6 km
(c) 9 km
(d) 13 km
Answer
Answer: (d) 13 km
Question 9.
As we go up in troposphere layer of the atmosphere the pressure
(a) increases
(b) decreases
(c) no change
(d) all of these
Answer
Answer: (b) decreases
Question 10.
Which one of the following gases protects us from harmful sun’s rays?
(a) Ozone
(b) Nitrogen
(c) Carbon dioxide
(d) Oxygen
Answer
Answer: (a) Ozone
Question 11.
Which of the following are part of weather forecast in the newspapers?
(a) Temperature
(b) Humidity
(c) Time of Sunset
(d) All of These
Answer
Answer: (d) All of These
Question 12.
Which element of weather is measured in degree Celsius?
(a) Temperature
(b) Pressure
(c) Wind
(d) Gravity
Answer
Answer: (a) Temperature
Question 13.
The water boils at
(a) 10°C
(b) 50°C
(c) 75°C
(d) 100°C
Answer
Answer: (d) 100°C
Question 14.
Where is the air pressure highest?
(a) Moon
(b) Sea Level
(c) Stratosphere
(d) Exosphere
Answer
Answer: (b) Sea Level
Question 15.
What is very hot wind called?
(a) Loo
(b) Cool breeze
(c) Monsoon air
(d) Trade wind
Answer
Answer: (a) Loo
Question 16.
Which one of the following is a local wind?
(a) Sea breeze
(b) Trade wind
(c) Monsoon wind
(d) None of these
Answer
Answer: (a) Sea breeze
Question 17.
Rain, snow sleet or hail are the different forms of:
(a) Condensation
(b) Evaporation
(c) Precipitation
(d) All of these
Answer
Answer: (c) Precipitation
Match the contents of Column A with that of Column B
| Column A | Column B |
| 1. Temperature | (a) Bacteria in soil |
| 2. Pressure | (b) Thermosphere |
| 3. Seasonal wind | (c) Barometer |
| 4. Radio waves transmission | (d) Thermometer |
| 5. Nitrogen from air | (e) Change directions in different seasons |
Answer
Answer:
| Column A | Column B |
| 1. Temperature | (d) Thermometer |
| 2. Pressure | (c) Barometer |
| 3. Seasonal wind | (e) Change directions in different seasons |
| 4. Radio waves transmission | (b) Thermosphere |
| 5. Nitrogen from air | (a) Bacteria in soil |
Fill in the blanks with appropriate words:
1. Earth is surrounded by a blanket of air called ………….
Answer
Answer: atmosphere
2. Green plants produce …………. during photosynthesis.
Answer
Answer: oxygen
3. Increased volume of ………….. is affecting the earth’s weather and climate.
Answer
Answer: carbon dioxide
4. Ionosphere is the part of ……………
Answer
Answer: thermosphere
5. Amount of rainfall is measured by ………….
Answer
Answer: rain gauge
6. Insolation influences the distribution of …………….
Answer
Answer: temperature
State whether the given statements are true or false.
1. Hot air is dense and heavy and cold air is lighter and expands.
Answer
Answer: False
2. Without Greenhouse effect earth would have been too cold to live.
Answer
Answer: True
3. Ionosphere contains the ozone layer.
Answer
Answer: False
4. Helium and hydrogen float from exosphere into space.
Answer
Answer: True
5. Wind-vane shows the direction of wind.
Answer
Answer: True
6. Air moves from high pressure to low pressure.
Answer
Answer: True