30 Questions
What is the effect of IR radiation on plants in the presence of water vapour?
It supplies the necessary thermal energy to the plant environment
Which part of the solar radiation spectrum has a direct influence on all plant parts?
Visible spectrum
At what stage of plant growth is radiation intensity most critical for Maize?
During the third month
What is the formula to represent the radiation balance?
I = a + r + t
What is the term for the body that completely absorbs all the heat radiation falling on it without reflecting or transmitting any of it?
Blackbody radiation
What is the term for the ratio of the emissivity of a body to the emissivity of a blackbody?
e = Es/Eb
What is the term used to describe the difference between total incoming and outgoing radiations at the Earth's surface and top of the atmosphere?
Radiation balance
What is the process by which heat is transferred into or out of the soil?
Conduction
What is the term used to describe the flow of heat between the surface and air near the surface?
Sensible heat flux
What is the process by which water is transferred from the surface to the air through evaporation?
Evaporation
What is the term used to describe the flow of heat to and from the surface through the process of evaporation or condensation?
Latent heat flux
What is the term used to describe the flux or flow of heat into or out of the soil?
Soil heat flux
What is the term for the radiant flux density emitted by a source?
Emissive power
What is the shape of the Earth's orbit around the Sun?
Elliptical
How far is the Earth from the Sun on average?
149.5 million km
What is the term for the day with the longest period of daylight?
Solstice
What type of radiation is chemically very active and detrimental to plants?
Radiation with a shorter wavelength than visible light
What prevents cosmic, gamma, and X-rays from reaching the Earth's surface?
The Earth's atmosphere
What is the total amount of incoming solar radiation received on a unit area of a horizontal surface in unit time?
Insolation
What is the solar constant dependent on?
Energy output of the sun and Distance from earth to sun
What is the unit of solar constant?
All of the above
What is the process of transfer of heat energy from warmer to cooler?
All of the above
What type of radiation do heavenly bodies emit?
Short wave radiation
What is the radiant flux divided by the area across which the radiation is transmitted?
Radiant flux density
What is the primary cause of the blue colour of the sky?
Rayleigh scattering
What is the term for the process of heat required for evaporation?
Latent heat flux
What is the percentage of incoming solar radiation that is absorbed by water vapour, dust, and O3?
15%
What is the term for the process of heat released during condensation?
Net emission by water vapour, dust, and CO2
What is the type of scattering that occurs when the circumference of the scattering particle is less than 1/10th of the wavelength of the incident radiation?
Rayleigh scattering
What is the percentage of incoming solar radiation that is reflected by the surface?
3%
Test your knowledge on insolation, the amount of solar radiation received on a unit area, and the solar constant, which affects the energy output. Learn about the factors that influence insolation, including the transparency of the atmosphere and the angle of the sun's rays. Assess your understanding of these essential concepts in environmental science.
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