Which two elements make up the greatest
percentages by mass in earth’s crust?
(1) oxygen and potassium
(2) oxygen and silicon
(3) aluminum and potassium
(4) aluminum and silicon

Describe how ocean currents can affect a moving object ❕❕❕

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

When you start from a given set of rules and conditions and determine what must be true you are using blank reasoning