Chemical Reactions and Phase Change Crossword Puzzle

QUESTIONS LIST:

• liquid: the state of matter in which atoms move around one another.
• change: when thermal energy is added or removed, this is what happens to a substance's state.
• solid: this physical state has particles that move slowly and are closely packed.
• conserve: in the scientific process, this principle indicates that mass is not lost in a reaction.
• atoms: the total number of _ remains the same in a chemical reaction.
• reaction: the process where atoms are rearranged to form new substances.
• decreased: when energy is _ the molecules move slower and closer together.
• gas: the physical state in which particles are widely spaced and move freely and away from one another
• heat: the movement of particles within a substance that leads to temperature changes.
• vapor: this substance change occurs when a liquid turns to gas.
• stronger: the molecules in a solid have a _ attraction.
• rearrange: this is what atoms do during a chemical reaction.
• arrow: this is a feature used to show the flow of energy in a scientific model.