The diagram above suggests that A.
geologic time periods occur in repeating cycles.
B.
geologic eras occur in repeating cycles.
C.
the Earth has not changed over geologic time.
D.
the Earth has changed over geologic time.

Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.

Why is a noble gas different from other elements?

Explain how a step-down transformer makes electricity safe for use in homes