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CBSE Class 7 Science Quiz | CBSE Class 7 Science MCQs & Answers

Free download in PDF CBSE Class 7 Science MCQs & Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE Class 7 Students.
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81 An instrument used to study the speed of winds is called _________.
[A] manometer
[B] anemometer
[C] ammeter
[D] speedometer
Answer: anemometer
82 The direction of airflow is also affected by Earth’s rotation. It is called ________.
[A] Coriolis Effect
[B] El nino Effect
[C] La Nina Effect
[D] Greenhouse Effect
Answer: Coriolis Effect
83 Which one of the following statement is INCORRECT?
[A] When air gets heated, it expands.
[B] when air gets cooled, it contracts.
[C] The warm air is heavier than cold air.
[D] Air moves from high pressure region to low pressure region.
Answer: The warm air is heavier than cold air.
84 What is the name given to the wind blowing from sea to land?
[A] Thunderstorm
[B] Land breeze
[C] Sea breeze
[D] cyclone
Answer: Sea breeze
85 When wind speed increases, air pressures
[A] decreases
[B] increases
[C] remains constant
[D] none of these
Answer: decreases
86 Soil formation is a
[A] slow process
[B] fast process
[C] rapid process
[D] none of these
Answer: slow process
87 Which soil horizon contains humus?
[A] A-Horizon
[B] B-Horizon
[C] C-horizon
[D] Bedrock
Answer: A-Horizon
88 Which topsoil is best suited for growing plants
[A] Sandy soil
[B] Loamy Soil
[C] Clayey Soil
[D] None of these
Answer: Loamy Soil
89 Soil profile refers to an arrangement within a soil of
[A] its horizontal layout
[B] vertical layout
[C] Size of soil particles
[D] None of these
Answer: its horizontal layout
90 The water holding capacity is the highest in
[A] sandy soil
[B] clayey soil
[C] loamy soil
[D] mixture of sand and loam
Answer: clayey soil
91 In addition to the rock particles, the soil contains
[A] air and water
[B] water and plants
[C] minerals, organic matter, air and water
[D] water, air and plants
Answer: minerals, organic matter, air and water
92 Which soil layer is made up of small lumps of rocks?
[A] A-horizon
[B] B-horizon
[C] C-horizon
[D] Bedrock
Answer: C-horizon
93 Toys, pots, and statues are made up of which soil type?
[A] Sandy Soil
[B] Clayey Soil
[C] Loamy Soil
[D] None of these
Answer: Clayey Soil
94 Lentils (masoor) and other pulses are grown in which of the following soil type?
[A] Sandy Soil
[B] Clayey Soil
[C] Loamy Soil
[D] None of these
Answer: Loamy Soil
95 Percolation rate of water is the least in ___________?
[A] Sandy Soil
[B] Clayey Soil
[C] Loamy Soil
[D] None of these
Answer: Clayey Soil
96 Which of the following soil type is loosely packed with large air spaces?
[A] Sandy Soil
[B] Clayey Soil
[C] Loamy Soil
[D] None of these
Answer: Sandy Soil
97 Find the odd one out.
[A] Nasal Cavity
[B] Nostrils
[C] Pharynx
[D] Trachea
Answer: Pharynx
98 Tiny air sacs of lungs are called ______.
[A] alveoli
[B] trachea
[C] bronchi
[D] larynx
Answer: alveoli
99 Which of the following animal can breathe through skin as well through lungs?
[A] frog
[B] cockroach
[C] fish
[D] mammal
Answer: frog
100 When we breathe out, exhaled air turns lime water into _______ due to presence of ________.
[A] orange, oxygen
[B] milky, oxygen
[C] milky, carbon dioxide
[D] milky, carbon monoxide
Answer: milky, carbon dioxide
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