Tag: evs

Questions Related to evs

Fill in the blank:

A shooting star is a _______.

evs our earth and the space asteroids, comets, and meteors and meteorites other objects in solar system asteroids, comets and meteors

  1. comet

  2. meteor

  3. meteorite

  4. none of the above

Show answer
Correct Option: B
Explanation:

Shooting stars look like stars that quickly shoot across the sky, but they are not stars. A shooting star is really a small piece of rock or dust that hits Earth's atmosphere from space. It moves so fast that it heats up and glows as it moves through the atmosphere. Shooting stars are actually what astronomers call meteors. Most meteors burn up in the atmosphere before they reach the ground. However, once in a while a meteor is large enough than some of it survives and reaches Earth's surface. Then it is called a meteorite.
Hence, shooting star is a common name for the visible path of a meteoroid as it enters the atmosphere, becoming a meteor.

State whether true or false :

Comets and meteoroids are also the minor members of the solar system. 

evs our earth and the space asteroids, comets, and meteors and meteorites other objects in solar system asteroids, comets and meteors

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Comets are cosmic snowballs of frozen gases, rock and dust when passing close to the Sun, heats up and begins to outgas, displaying a tail. Comets have a wide range of orbital periods, ranging from several years to several millions of years. An example is the famous Halley's comet which has an orbital period of 76 years.

 A meteorite is a solid piece of debris from such sources as asteroids or comets, that originates in outer space and survives its impact with the Earth's surface. It is called a meteoroid before its impact.

Halley's comet can be seen from the Earth after every 26 years.

evs our earth and the space asteroids, comets, and meteors and meteorites other objects in solar system asteroids, comets and meteors

  1. True

  2. False

Show answer
Correct Option: B

Kulh is 

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. Dam

  2. Irrigation canal

  3. Crop field

  4. None of the above

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Correct Option: B

Kulh carries water from .......... to village.

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. Glaciers

  2. River

  3. Sea

  4. Water tank

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Correct Option: A

What is the percentage of earth surface which is covered by oceans and seas?

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. 50%

  2. 75%

  3. 88%

  4. 97%

Show answer
Correct Option: D
Explanation:

97% of earth surface is covered by ocean and seas.

Which of the following is a source of fresh water?

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. Rain water

  2. Ground water

  3. Surface run-off

  4. All of the above

Show answer
Correct Option: D
Explanation:

The rainwater ,groundwater and surface runoff are the source of freshwater.

Fresh water is naturally occurring water on Earth's surface in ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers and streams, and underground as groundwater in aquifers and underground streams.
Thus all the three of the options are correct.

The given table shows properties of 

system  intracellular concentration of water  Extracellularconcentration of water
A 0.09 m  0.11 m
B 0.2 m 0.5 m
C 0.05 m 0.7 M
D 0.03 0.6 M

four cells system A, B, C and D. The maximum rate of inward diffusion of water will be observed in which of these system?

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. system A

  2. system B

  3. system C

  4. system D

Show answer
Correct Option: A

Running water is called

evs sources of water water resources and conservation receding water table water conservation and irrigation importance of water water: a precious resource

  1. Lentic

  2. Lotic

  3. Standing water

  4. Streams

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Correct Option: B

Human faeces is main source of organism, in

evs sources of water water resources and conservation receding water table water conservation and irrigation importance of water water: a precious resource

  1. Air

  2. Water

  3. Atmosphere

  4. Forests

Show answer
Correct Option: B