PhySci S2 Week 12 Definitinos

a measure of the change in velocity of a moving object. It measures the rate at which velocity changes

• Acceleration
• Deceleration
• Speed
• Velocity

closeness of a measurement to the true value.

• Accuracy
• Precision
• Reliability
• Correctness

ionic compounds that produce positive hydrogen ions (H+) when dissolved in water

• Acids
• Bases
• Alkalis
• Hydrates

ionic compounds that produce negative hydroxide ions (OH-) when dissolved in water

• Base
• Alkali
• Acids
• Anions

a substance that increases the rate of a chemical reaction by lowering the activation energy

• Catalyst
• Inhibitor
• Reactant
• Enzyme

a force of attraction between atoms or ions that occurs when atoms share or transfer valence electrons

• Chemical bond
• Covalent bond
• Ionic bond
• Molecular bond

energy that is stored in the chemical bonds in molecules

• Chemical energy
• Potential energy
• Activation energy
• Kinetic energy

a representation of a chemical reaction that displays the reactants and products with chemical formulas

• Chemical equation
• Equation
• Formula
• Reaction equation

process in which some substances change into different substances

• Chemical reaction
• Reaction
• Transformation
• Conversion

a unique substance that forms when two or more elements combine chemically

• Compound
• Mixture
• Element
• Solution