It looks like it would be the 1st answer choice...
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The answer is Light exposure
Explanation:
Instruments are designed and calibrated to take measurement of certain properties in the environment.
Most scientific instruments measures quantitatively, a wide range of physical and chemical properties.
- Thermometers are used in measuring temperature
- Hydrometer is used in measuring density
- Triple balance measures mass
- A weight scale records weight
- Hydrometer measures relative humidity
- Rulers are for measuring lengths
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The heating of the troposphere<span> is </span>caused<span> by convection currents. Convection currents are created when the sun warms the air currents at the planet's equator to a greater degree than it does at the planet's poles.
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~Mistermistyeyed.</span>
Fertile soil is valuable because there is a limited supply. Less than one eighth of land on Earth has soil that are well suited for farming.
The thick, fertile soil of the prairies took many thousands of years to develop.
The two ways that the value of soil can be reduced is help use soil correctly, peanuts were once a corp to help soil, and still can be. The soil value recycle rocks and bedrock.
The value of soil is reduced when it loses its fertility and when topsoil is lost due to erosion. Soil can be conserved through contour plowing, conservation plowing and crop rotation. The thick mass of tough roots at the surface of the soil.