Why can the sun transmit heat to earth only by radiation? . the space between the sun and earth contains almost no matter.. radiation transmits heat through the motion of a gas.. radiation does not require the creation of electromagnetic waves.. the molecules in the sun are moving too fast to cause conduction.

Which statements best describe medical uses for radioactive isotopes? check all that apply. radioactive isotopes are used to detect medical problems. high-energy gamma rays are injected into the body. radioactive isotopes are used to treat some diseases. radiation is used to kill cancer cells. radioactive isotopes are directed at tumors from outside the body.