Answer: Due to a transfer of Earth's rotational momentum to the Moon's orbital momentum as tidal friction slows the Earth's rotation. That increase in the Moon's speed is causing it to slowly recede from Earth (about 4 cm per year), increasing its orbital period and the length of a month as well. In orbital mechanics, a gain in speed results in a higher orbit. The slowing rotation of the Earth results in a longer day as well as a longer month. Once the length of a day equals the length of a month, the tidal friction mechanism will cease. That's been projected to happen once the day and month both equal about 47 days, billions of years in the future. If the Earth and Moon still exist, the Moon's distance will have increased to about 135% of its current value.
It is the gypsum. Gypsum is a delicate sulfate mineral made out of calcium sulfate dihydrate, with the synthetic recipe CaSO. 4· 2H2O. It is broadly mined and is utilized as a compost, and as the principle constituent in many types of mortar, writing board chalk and wallboard.
Acid rain is an example of chemical weathering
Answer:
ii and iii
Explanation:
All the others are voluntary
