How does crop rotation preserve soil ! the answers are 1. it holds water near the roots of plants 2. it keeps soil from blowing away 3. it removes soil nutrients 4. it returns nutrients to soil          5th grade question

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

How many grams of mgbr2 are needed to produce 75g or metal?