Lol someone help me with this

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

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space