Which illustrates different states of a substance? 1.limestone and crushed limestone
2.ice and water vapor
3.sugar and water
4.oxygen and nitrogen

An experimental procedure requires a 10 ml of acid to be dissolved

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity

The bone of a dinosaur and the imprint of a leaf are examples of which kind of fossils? a) index b) body c) amber d) trace