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What type of change occurs when ice melts?
Physical
What type of change occurs when paper burns?
Chemical
What name is given to substances at the start of a reaction?
reactant
What name is given to substances at the end of a reaction?
products
What word means "the new substances formed in a chemical change"?
products
What symbol is used in equations to mean “yields” or “produces”?
→ (Arrow)
Who discovered the law of conservation of mass?
Lavoisier
What does the word conservation mean?
Staying the same
What law states that mass is neither created nor destroyed in a reaction?
Conservation (of Mass)
What type of equation shows equal numbers of each atom on both sides?
Balanced
What element reacts with hydrogen to make water?
Oxygen
What small particle theory is used to explain conservation of mass?
Particle
What type of change is usually easy to reverse?
Physical
What type of change is usually hard to reverse?
Chemical
What process produces rust?
Oxidation
What form of energy is often released in chemical reactions?
Heat
