What is the movement of matter due to density differences called? A a convection current
B a pressure belt
C a climate cycle
D an ocean current

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

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

Connect the whole numbers on the periodic table to indicate what they represent?