Nature's compass

The first type of "compass" is the sun.

We live in the northern hemisphere, except for the south of the tropic line, where the sun's rays always shine from the south. In this way, the north-south direction is easy to determine. We all know that the sun is rising east and west, the morning sun rises in the east, the evening when the mountain falls, and the sun is in our south at noon.

However, you can't do this in a dogmatic way, if you are in the southern hemisphere or between the regression lines.

The second "compass" is the moon.

The crescent of the third and fourth quarters, at low altitudes in the west at sunset; the half moon of the first seven or eight, when the sun just descended, was on top of our heads. During the month and a half, the sun just descended and the moon rose from the east.

The direction of the moon at night is: the first quarter, at 6 o'clock in the south, and at 12 o'clock in the west at night. The full moon, at 6 o'clock in the east, at 12 o'clock in the south, the next morning at 6 o'clock in the west. The next string month, at 12 o'clock in the east, the next morning at 6 o'clock in the south.

The third "compass" is the North Star.

Polaris is the best compass, and Polaris is in the right direction.

But how do you find Polaris? In fact, it is easy to find the familiar Big Dipper. The Big Dipper is like a water scoop. The two stars on the edge of the water scoop are extended to roughly five times the equivalent. There is a bright star, that is, the North Star.

In contrast to the Polaris, there is also a constellation of the queen, shaped like the English letter W, which can also help us find the North Star.

At around 8 o'clock in the evening, if you can find the Polaris with the Big Bear from February to August, it is better to rely on Cassiopeia from December to January.

The fourth "compass" is the tree.

This method is also very easy. For example, in the north of the Tropic of Cancer, the sun shines from the south, and the south side of the trees gets more heat from the sun than the north. Therefore, the branches of the independently growing trees grow denser and thicker, while the branches to the north are sparse. Thin.

It can also be judged from the annual ring. The annual ring width is facing south, and the dense north is facing. Because the south grows faster than the north, the interval between the annual ring and the circle is wider.

The fifth "compass" is snow.

Again, take the northern hemisphere where we are in. The snow on the southern slopes should be tighter and granular. The snow on the northern slopes should be soft and dry.

When the snow melts, the snow on the southern slope is easier to melt than the north.

Fifth grade: Wu Siying