The length of days and nights is caused by the earth's

tilt
shape
size
distance from sun

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

Salt in oceans comes from and of rocks

What is the value of the standard enthalpy of formation of an element in its most stable form?