Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

Option (A)

Explanation:

At the initial stage, the heat produced from the earth's core heats up the matter present in the lower mantle and due to this continuous heating the matter gets expand and looses its density, thereby forces the matter to move upward.

          This warmer matters then rises up and temperature decreases, as a result of which the magma/matter becomes denser and again falls back under the action of gravity.

This continuous process is called the convection current.

Hence the correct option is (A)

good thing- during decomposition the organic molecules in organic matter are broken down into simpler organic molecules that require further decomposition or into mineralised nutrients

bad thing- it can be harmful in crop productivity

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.