Que- What is troposphere?
a. Portion of air
b. Portion of water
c. Lowest layer of atmosphere where we survive
d. Portion of sky
Answer- Lowest layer of atmosphere where we survive
Explanation- The lowest region of the atmosphere, extending from the earth's surface to a height of about 6–10 km (the lower boundary of the stratosphere).
Que- When human body is infected by infection __________ type of cells are activated to defend the body.
a. erythrocytes
b. leukocytes
c. lymphocytes
d. monocytes
Answer- lymphocytes
Explanation- When human body is infected by infection lymphocytes are activated to defend the body.
Que- Who among the following is commonly called " Bird Man of India " ?
a. Salim Ali
b. M.S. Swaminathan
c. M.C. Mehta
d. Raphel Emerson
Answer- Salim Ali
Explanation- Salim Ali, often called 'the bird man of India', was among our best-known ornithologists and conservationists. His work as scientist, teacher and writer introduced millions of Indians to the joys of the natural world.
Que- The movement " Pani Panjayath " was initiated to conserve waters in the drought prone areas of _______state.
a. Tamilnadu
b. Rajasthan
c. Maharashtra
d. Karnataka
Answer- Maharashtra
Explanation- The movement " Pani Panjayath " was initiated to conserve waters in the drought prone areas of Maharashtra state.
Que- Carbon monoxide is a pollutant because
a. it reacts with O2
b. it inhibits glycolysis
c. makes nervous system inactive
d. reacts with haemoglobin
Answer- reacts with haemoglobin
Explanation- Carbon monoxide is a pollutant because reacts with haemoglobin.
Que- Which one of the following is the non-renewable resource?
a. Water
b. Oxygen
c. Sunlight
d. Coal
Answer- Coal
Explanation- The most common examples of non-renewable resources are fossil fuels, such as coal, oil and natural gas. Although these resources form naturally within the earth, they take billions of years to do so. Other non-renewable resources include metals, minerals and stone.
Que- The first tropic level refers to
a. all herbivores
b. all green plants
c. sunlight
d. all animals
Answer- all green plants
Explanation- The first trophic level consists of primary producers such as plants and other photosynthetic organisms. The second trophic level consists of primary consumers that feed upon producers. They are herbivores.
Que- Abyssal zone in ocean has
a. no sunlight but contains decomposers and consumers
b. no sunlight but contain producers
c. sunlight and decomposers
d. sunlight and producers
Answer- no sunlight but contains decomposers and consumers
Explanation- Abyssal zone in ocean has no sunlight but contains decomposers and consumers.
Que- Sunlight passes through a thicker portion of the atmosphere at
a. Sunrise
b. Noon
c. Sunset
d. Both a and c
Answer- Both a and c
Explanation- Sunlight passes through a thicker portion of the atmosphere at sunrise and sunset.
Que- A small particle of soil blown by dust is known as
a. saltation
b. suspension
c. surface creep
d. landslide
Answer- suspension
Explanation- A small particle of soil blown by dust is known as suspension.
Que- Most of the radiation emitted by a human body is in the form of:
a. Ultraviolet radiation and is invisible
b. Visible radiation but is too weak to be visible
c. Infrared radiation and is invisible
d. Humans do not emit electromagnetic radiation
Answer- Infrared radiation and is invisible
Explanation- Most of the radiation emitted by the human body is mainly at the wavelength of 12 micron. The wavelength of infrared radiation is between 0.75 to 1000 micron (1 micron = 10-6metres). Hence , the majority of radiation emitted by human bodies lie in the infrared region.
Que- Solar radiation reaches the earth's surface as:
a. Visible radiation only
b. Ultraviolet radiation only
c. Infrared radiation only
d. Ultraviolet, visible, and infrared radiation
Answer- Ultraviolet, visible, and infrared radiation
Explanation- Solar radiation reaches the earth's surface as ultraviolet, visible, and infrared radiation.
Que- The earth's atmospheric window is in the:
a. Ultraviolet region
b. Visible region
c. Infrared region
d. Polar regions
Answer- Infrared region
Explanation- The earth's atmospheric window is in the infrared region.
Que- Carbon monoxide is a pollutant because it
a. reacts with 02
b. reacts with hemoglobin
c. inhibits glycolysis
d. inactivates nervous system A
Answer- reacts with hemoglobin
Explanation- Carbon monoxide is a pollutant because it reacts with hemoglobin.
Que- High biological oxygen demand indicates:
a. absence of microbial pollution
b. moderate microbial pollution
c. intense level of microbial pollution
d. all of these
Answer- intense level of microbial pollution
Explanation- BOD indicates the amount of putrescible organic matter present in water. Therefore, a low BOD is an indicator of good quality water, while a high BOD indicates polluted water. Dissolved oxygen (DO) is consumed by bacteria when large amounts of organic matter from sewage or other discharges are present in the water.
Que- Sinking air warms by this process:
a. Compression
b. Expansion
c. Condensation
d. Friction
Answer- Compression
Explanation- Rising air always cools, and, conversely, sinking air always warms. This type of temperature change, which is caused simply by ascent or descent in the atmosphere, is called adiabatic cooling or warming.
Que- The horizontal transport of any atmospheric property by the wind is called:
a. Advection
b. Radiation
c. Conduction
d. Latent heat
Answer- Advection
Explanation- The horizontal transport of any atmospheric property by the wind is called advection. A heat transfer process in the atmosphere that depends upon the movement of air is: Convection.
Que- Perspiration cools the body by
a. Advective heat transfer
b. Radiative heat transfer
c. Conductive heat transfer
d. Latent heat transfer
Answer- Latent heat transfer
Explanation- Perspiration cools the body by latent heat transfer. Sweat helps cool you down by releasing moisture onto your skin. But that's not all that's going on. On a hot day, your sweat evaporates from your skin taking a little bit of your body heat with it.
Que- The forests which occur in law rain fall area is
a. Evergreen forests
b. Deciduous forests
c. Coniferous forest
d. all the above
Answer- Deciduous forests
Explanation- This forest occurs in areas of low rainfall. Forest types are xerophytic in nature. Trees are shorter than deciduous type. These forests mostly occur in the scanty rainfall region of Rajasthan, Punjab and Haryana.
Que- Forests grow in high rain fall areas are
a. ever green forests
b. temperate forests
c. conifers
d. Tundra
Answer- ever green forests
Explanation- Forests grow in high rain fall areas are evergreen forests.
Que- Water vapour is:
a. A gas
b. A cloud droplet
c. A rain drop
d. A snowflake
Answer- A gas
Explanation- Water vapour, water vapour or aqueous vapour is the gaseous phase of water. It is one state of water within the hydrosphere. Water vapour can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Unlike other forms of water, water vapour is invisible. Under typical atmospheric conditions, water vapour is continuously generated by evaporation and removed by condensation. It is less dense than air and triggers convection currents that can lead to clouds.
Que- What is the cause of the Exxon Valdez?
a. Oil Tanker which sank in 1989 along the coast of Alaska and marine life seriously affected.
b. a plane which crashed and caused death of human life
c. a ship which wrecked on the coast of India
d. none of these.
Answer- Oil Tanker which sank in 1989 along the coast of Alaska and marine life seriously affected.
Explanation- It spilled 10.8 million US gallons (260,000 bbl) (or 37,000 metric tonnes) of crude oil over the next few days. It is considered to be one of the worst human-caused environmental disasters. The Valdez spill is the second largest in US waters, after the 2010 Deep water Horizon oil spill, in terms of volume released
Que- In calm air the air temperature is -10o C, if the wind speed should increase to 30 knots (with no change in air temperature) the thermometer would indicate:
a. A much higher temperature than -10o C
b. A much lower temperature than -10o C
c. A temperature of -10o C
d. A temperature of -30o C
Answer- A temperature of -10o C
Explanation- In calm air the air temperature is -10o C, if the wind speed should increase to 30 knots (with no change in air temperature) the thermometer would indicate a temperature of -10o C.
Que- Infrared and visible satellite images might provide:
a. A way of determining cloud thickness and altitude.
b. A way of distinguishing between wet and dry clouds.
c. A way of identifying clouds suitable for cloud seeding.
d. A way of distinguishing between " new " and " old " clouds.
Answer- A way of determining cloud thickness and altitude.
Explanation- Infrared satellite technology works by sensing the temperature of infrared radiation being emitted into space from the earth and its atmosphere. Basically, all objects (including water, land, and clouds), radiate infrared light. However, our eyes are not " tuned " to see this kind of light, so we don't notice it. Weather satellites not only sense this infrared light, but they can also sense the temperature of the infrared emissions.Visible satellite images can be thought of as photographs of the earth from space. Since they are like a photograph, they are dependent on visible light (brought by the sun). As a result, visible satellite pictures only work during daylight hours. This is the greatest drawback to using visible imagery. Also, since a visible satellite picture is basically a photograph, thicker clouds (which reflect the most sunlight) show up very bright, while thinner clouds (like cirrus) are hard to distinguish.
Que- At what time of day is the relative humidity normally at a minimum?
a. When the air temperature is highest
b. Just before sunrise
c. About midnight
d. When the air temperature is lowest
Answer- When the air temperature is highest
Explanation- Relative humidity is a measure of the water vapour content of the air at a given temperature. The amount of moisture in the air is compared with the maximum amount that the air could contain at the same temperature and expressed as a percentage.