5. Classify the following as examples of newton's first law, second law and third law. Justify your
classification. [3marks]
a. A stone in the ground
b. Two people walking together
C. A hammer pushes a nail

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

it is the second option.

3. dark matter

empty space could also be a simple vacuum