The ancient false idea that life appeared from nowhere
it is a crossword puzzle it's 21 letters

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

There are main groups in the modern periodic table of elements

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?