Which of the following contains the smallest amount of matter? 30 g 3,000 cg 30 dg 0.30 kg

In an energy pyramid, which level has the most available energy?

Why do cells appear different in distilled water than they do in 10% salt water?

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