ASTRONOMY VS ASTROLOGY

BEFORE WE START... THE SCIENTIFIC METHOD

First of all, we are going to learn the phases of the scientific method with an experience...

FIRST PHASE. OBSERVATION

We know that plants take the water from the soil with roots, because we can see a liquid inside the stem (the sap).

SECOND PHASE. QUESTION

But, how it takes the water? Can we water plants with seawater?

THIRD PHASE. HYPOTHESIS

The roots skin can take the water because it is semi-permeable (allows the pass of water). So that, when the salt concentration inside the plant is higher than in the soil the water pass roots skin and enter in the plant. Then the salt concentration of both places is the same.

We cannot water plants with seawater, because the water inside the plant would go to the soil and the plant would dry.

FOURTH PHASE. EXPERIMENT