Which sentence is a scientific statement? A. There is a substance around us that cannot be detected. B. Kids should go to school for 12 years. C. Experimentation is the best way to obtain knowledge. D. Unicorns once existed on Earth. E. There are no living things on the Moon

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (use the periodic table as necessary.) group most likely ionic charge # of valence electrons i +1 ii +2 iii +3 iv +4 or -4 v -3 vi -2 vii -1 viii 0

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

What happens to the temperature of a substance when the average kinetic energy of its particles increases?