Energy Changes Crossword Puzzle

QUESTIONS LIST:

• exothermic : a reaction that gives out energy
• endothermic : a reaction that takes in energy
• products : made by a chemical reaction
• reactants : used up in a chemical reaction
• bubbles : often produced by a chemical reaction
• insulation : provided by the polystyrene cup
• thermometer : used to measure temperature
• activation : the spare energy needed to start a reaction
• catalyst : a substance that speeds up a reaction
• bond : joins two atoms together
• compound : made of 2 o3 different atoms
• physical : not a permanent change
• neutralization : when an acid cancels out an alkali (base)
• ice : mixed with ice to make an endothermic reaction
• respiration : a reaction inside all cells that releases energy