This layer keeps us "not too hot in the summer" and "not too cold in the winter."Scientists call this the effect.

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted