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Everyday Science 2124 MCQs [All-Courses]

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The planet retains an atmosphere when?

A Gravity is low and temperature of atmosphere is great

B Gravity and temperature both are great

C Gravity and temperature both are constant

D Gravity is great and temperature of atmosphere is low

Review Detailed Answer

Correct Answer: Gravity is great and temperature of atmosphere is low

Parsec is a unit of ___________?

A Energy

B Time

C Power

D Distance

Review Detailed Answer

Correct Answer: Distance

Atmospheric pressure is the force (per unit-area) perpendicular to a unit-area of planetary surface, as determined by _________.

A Mass of vertical column of atmospheric gases

B Mass of horizontal column of atmospheric gases

C Weight of vertical column of atmospheric gases

D Mass of vertical and weight of horizontal of atmospheric gases

Review Detailed Answer

Correct Answer: Weight of vertical column of atmospheric gases

In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called ?

A Chemical Reaction

B Nuclear reaction

C Fission nuclear reaction

D Fusion nuclear reaction

Review Detailed Answer

Correct Answer: Fusion nuclear reaction

___________ begins at 690 to 1,000 km from the surface, and extends to roughly 10,000 km.

A Troposphere

B Mesosphere

C Exosphere

D Stratosphere

Review Detailed Answer

Correct Answer: Exosphere

The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use ?

A red waves

B Infrared waves

C Ultrasonic

D super sonic

Review Detailed Answer

Correct Answer: Ultrasonic

Which of the following is true about Ionosphere?

A Its density is lesser at short distances from planetary surface in morning and further decreases as ionosphere rises at night-time, thereby allowing a greater range of radio frequencies to travel greater distances

B Its density is greater at short distances from tplanetary surface in daytime and decreases as ionosphere rises at night-time, thereby allowing a greater range of radio frequencies to travel greater distances

C Its density is greater at long distances from planetary surface in daytime and further increases as ionosphere rises at night-time, thereby allowing a greater range of radio frequencies to travel greater distances

D None of the above

Review Detailed Answer

Correct Answer: Its density is greater at short distances from tplanetary surface in daytime and decreases as ionosphere rises at night-time, thereby allowing a greater range of radio frequencies to travel greater distances

A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be ?

A 6 feet

B 12 feet

C 4 feet

D 3 feet

Review Detailed Answer

Correct Answer: 3 feet

Atmosphere is held in place by?

A Pressure of the planetary body

B Gravity of the planetary body

C Charge of the planetary body

D Heat of the planetary body

Review Detailed Answer

Correct Answer: Gravity of the planetary body

When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________?

A Visible

B Transparent

C Invisible

D opaque

Review Detailed Answer

Correct Answer: Visible

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Everyday Science 2124 MCQs [All-Courses]

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All Topics 2124

The planet retains an atmosphere when?

Parsec is a unit of ___________?

Atmospheric pressure is the force (per unit-area) perpendicular to a unit-area of planetary surface, as determined by _________.

In a fission nuclear reaction , a heavy nucleus breaks up into smaller nuclei whereas in another nuclear reaction two or more than two possibly nuclei are fused to form a heavy nucleus This nuclear reaction is called ?

___________ begins at 690 to 1,000 km from the surface, and extends to roughly 10,000 km.

The principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use ?

Which of the following is true about Ionosphere?

A six feet tall lady wants to see her full image in a plane mirror . The minimum length of the mirror will be ?

Atmosphere is held in place by?

When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________?