Why does the moon appear to move across the sky at night? It travels around the earth everyday.
All objects are moving in space.
The earth rotates on its axis.

i think it is rotation on axis

Explanation: It is the rotation of Earth that makes them seem to appear to be moving across the sky. As Earth rotates, causing night and day, it also takes a long journey around the sun. This yearly journey is called a revolution. This revolution takes 365 days, or one year.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.