You are stirring some boiling water with rice. You don’t want your hand to get hot. Should you use an aluminum spoon or a wooden spoon? Explain in the box below. Use numbers with units.

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

What does x represent in the formula for the compound xcl4?