Heat transfer horizontally within the atmosphere is called:

• conduction
• convection
• absorption
• advection
Correct Option: D  [ advection ]

Remark:

The hottest part of the gas flame is known as:

• luminous zone
• dark zone
• blue zone
• non-luminous zone
Correct Option: D  [ non-luminous zone ]

Remark:

Which microorganism is responsible for Dengue fever?

• Fungi
• Viruses
• Bacteria
• Protozoa
Correct Option: B  [ Viruses ]

Remark: transmitted by mosquitoes 'Aedes aegypti'.

Average distance of the earth from the Sun is:

• 150 Million km
• 15 Million km
• 90 Million km
• 900 Million km
Correct Option: A  [ 150 Million km ]

Remark:

The sun is seen before the actual sunrise because of:

• re?ection
• refraction
• scattering of light
• rectilinear propagation of light
Correct Option: B  [ refraction ]

Remark:

When a sound wave goes from one medium to another, the quantity that remains unchanged is:

• Frequency
• Amplitude
• Wavelength
• Speed
Correct Option: A  [ Frequency ]

Remark:

The exit of food from the stomach is regulated by which muscle

• cardiac
• sphincter
• skeletal
• None of these
Correct Option: B  [ sphincter ]

Remark:

The SI unit of temperature is

• Temperature
• Ampere
• Watt
• Kelvin
Correct Option: D  [ Kelvin ]

Remark:

Which of the following is an aquatic fern?

• Adiantum
• Dryopteris
• Salvinia
• Equisetum
Correct Option: C  [ Salvinia ]

Remark: Salvinia, a genus in the family Salviniaceae, is a floating aquatics with creeping stems, branched, bearing hairs on the leaf surface papillae but no true roots, named in honor of Anton Maria Salvini, Italian scientist.

Seismology is the science of :

• Atmosphere
• Earthquake
• Fossil
• Silkworm breeding
Correct Option: B  [ Earthquake ]

Remark: