Worksheet: The Atmosphere | Footprints Class 7: Book Solutions, Notes & Worksheets PDF Download

Multiple Choice Questions (MCQs)

Q1: What is the primary function of the ozone layer within the stratosphere?
(a) To create weather patterns
(b) To absorb and scatter ultraviolet radiation from the Sun
(c) To produce oxygen for respiration
(d) To regulate Earth’s temperature

Q2: Which of the following gases is the most abundant in Earth's atmosphere?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Argon

Q3: In which atmospheric layer do most weather phenomena occur?
(a) Exosphere
(b) Thermosphere
(c) Stratosphere
(d) Troposphere

Q4: What is the significance of carbon dioxide in the atmosphere?
(a) It is essential for respiration in animals.
(b) It is the primary source of nitrogen for plants.
(c) It plays a crucial role in photosynthesis and the greenhouse effect.
(d) It acts as a primary buffer in Earth's oceans.

Q5: What causes winds to move from one area to another?
(a) Movement of tectonic plates
(b) Uneven heating of Earth’s surface
(c) The rotation of the Moon around Earth
(d) Changes in the Earth's magnetic field

Fill in the Blanks

Q1: The most abundant gas in the Earth's atmosphere, making up about 78%, is ______.

Q2: The layer of the atmosphere where the International Space Station orbits is called the ______.

Q3: The process by which plants convert carbon dioxide into oxygen and glucose is known as ______.

Q4: ______ refers to the short-term atmospheric conditions such as temperature and precipitation in a given area.

Q5: The ______ is the zone on Earth that receives the most direct sunlight and is characterized by consistently high temperatures.

True/False

Q1: Argon makes up approximately 21% of the Earth's atmosphere.

Q2: The exosphere is the lowest layer of the Earth's atmosphere.

Q3: Humidity is a measure of the amount of carbon dioxide in the air.

Q4: Atmospheric pressure increases with altitude.

Q5: The ozone layer is located in the mesosphere.

Match the Column