Moss Is Not a Compass

Written by Studio AM.

Moss does not know which way is north. It grows where its needs are met: enough moisture, a suitable surface, and protection from harsh drying. In some places, the north side of a tree stays cooler and damper because it receives less direct sun. Moss may be thicker there, which can make the familiar rule seem plausible.

The rule fails in many settings. A nearby wall can shade the south side. Rain may strike one side of a trunk, while bark texture and overhanging branches change where water remains. Even two trees a few steps apart can show different patterns. In the Southern Hemisphere, the sun's path changes the simple north-side story, but local shade still matters more than a slogan.

A mossy trunk is therefore evidence about a tiny habitat, not a dependable compass. Notice which surfaces are damp, shaded, or rough. For direction, use a map, a compass, marked routes, or several reliable landmarks instead.

Questions

Choose an answer. The explanation appears after you answer.

  1. Question 1 of 4

    What is the passage mainly explaining?

  2. Question 2 of 4

    Why might two nearby trees show moss on different sides?

  3. Question 3 of 4

    What does "dependable" mean in the final paragraph?

  4. Question 4 of 4

    Why may moss be thicker on a tree's north side in some places?

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