Answer:
Radiation and advection
Explanation:
- Conduction: It happens when particles of matter are in direct contact, the adjacent atoms of higher energy vibrate against each other transferring energy from high to low temperature. Fluids and gases are less conductive than solids because their atoms have a greater distance. An example is the heat transferred between the electric burner of a stove and the bottom of a pan.
- Convection: Is a heat transference between a surface and a liquid or gas in motion, as the fluid/gas travels faster the transferred heat increases. An example of this transfer takes place in a forced-air furnace and weather systems.
- Advection: is similar to convection but the transfer of heat is lateral or horizontal. In the atmosphere this kind of transfer is common.
- Radiation: is the transfer through empty space, it occurs without an intervening medium when microwaves, infrared radiation, visible light or another electromagnetic radiation is emitted or absorbed. An example is the sun warming the Earth.
Advection and radiation are the primary forms of heat transfer. Convection only happens in the troposphere because horizontal heat transfer (advection) is significantly bigger. The same happens with conduction that only transfers heat in the lower layers of the atmosphere, Sun's radiation, on the other hand, gets absorbed in all the atmosphere.
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Grain farming is done for economic activity and this makes it commercial. It is highly specialized and mechanised. The yield per acre is low so the farms are big. The yield is high per man so little manpower is needed for production. Grain farming is subject to market conditions like climate.
I think its B C D are the ones that fit the most
Answer:
Option D is correct.
Explanation:
Euphorbia esula is commonly known as leafy spurge, it's a creeping perennial native from central Europe, and most of north Asia.
The leafy spurge has deep roots, that store vital nutrients that allow the plant to recover from most control efforts.
Each plant can produce around 140 seeds per flowering shoot, these seeds are then expelled up to 15 ft. They can subsist up to 8 years in the soil.
This allows the plant to grow exponentially as it infests new regions.
What do you mean and how is this a question?
