Transformations

• The Law of Conservation of Energy ➔ Energy cannot be created or destroyed, only transferred from one form to another
• Energy moves from one form to another.
• When particles gain energy they move more.
• The concept that everything is made of atoms which are constantly moving is called the Kinetic Theory of Matter
• An observation is made using our five senses of sight, touch, hearing, taste, and smell
• Inferences are possible explanations for what is observed
• An observation cannot be argued, whereas an inference can be argued against
• density = mass/volume
• The Law of Conservation of Mass states that mass cannot be created or destroyed
• Decomposition is a chemical reaction where a compound breaks down into simpler elements
• A reactant is the substances present at the start of a chemical reaction
• A product is the substance that is present at the end of the chemical reaction
• Combustion is a chemical reaction where fuel reacts to oxygen, which produces more heat
• The main reactants required for combustion are a fuel and an oxidizer, usually oxygen.
• Chemical changes involve the formation of new substances with different properties.
• The factors of chemical change include chemical composition and the formation or breaking of chemical bonds occur.
• Physical changes alter the form or appearance of a substance without creating new chemical substances.