Download PDF
Free download in PDF CBSE Class 7 Science MCQs & Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE Class 7 Students.
81
An instrument used to study the speed of winds is called _________.
[A]
manometer
[B]
anemometer
[C]
ammeter
[D]
speedometer
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
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
85
When wind speed increases, air pressures
[A]
decreases
[B]
increases
[C]
remains constant
[D]
none of these
86
Soil formation is a
[A]
slow process
[B]
fast process
[C]
rapid process
[D]
none of these
87
Which soil horizon contains humus?
[A]
A-Horizon
[B]
B-Horizon
[C]
C-horizon
[D]
Bedrock
88
Which topsoil is best suited for growing plants
[A]
Sandy soil
[B]
Loamy Soil
[C]
Clayey Soil
[D]
None of these
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
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
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
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
95
Percolation rate of water is the least in ___________?
[A]
Sandy Soil
[B]
Clayey Soil
[C]
Loamy Soil
[D]
None of these
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
97
Find the odd one out.
[A]
Nasal Cavity
[B]
Nostrils
[C]
Pharynx
[D]
Trachea
98
Tiny air sacs of lungs are called ______.
[A]
alveoli
[B]
trachea
[C]
bronchi
[D]
larynx
99
Which of the following animal can breathe through skin as well through lungs?
[A]
frog
[B]
cockroach
[C]
fish
[D]
mammal
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
Take Mock Tests