8. What are two pieces of evidence that molecules are always moving?

Explanation:

Sometimes this motion is easy to observe, such as when you see evidence of molecules in air bouncing dust particles around. Umm...for example, when you place a drop of food coloring into water, the motion of the water molecules eventually causes the food coloring to spread throughout the water.

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.