Matter & Energy Basics
The building blocks of all matter.
What are atoms?
When water boils, this happens to the motion of its molecules.
What is they move faster and spread apart?
Substances that combine or react in a chemical reaction.
What are reactants?
The goal engineers had when designing chemical cold packs.
The goal engineers had when designing chemical cold packs.What is to absorb thermal energy and make something feel colder?
The main goal of the scientific process.
What is to answer a question using evidence?
The amount of matter in a substance.
What is mass?
The form of energy transferred between objects of different temperatures.
What is heat or thermal energy?
The substances that are formed after a chemical reaction.
What are products?
The two main substances used in a chemical cold pack prototype.
What are vinegar and baking soda?
The main goal of the engineering process.
What is to solve a problem using design and testing?
This happens when thermal energy is added to matter.
What is an increase in particle motion or temperature?
The change in state from a liquid to a gas when enough energy is added.
What is evaporation or boiling?
The type of reaction that absorbs energy from its surroundings.
What is an endothermic reaction?
The process engineers follow to design, test, and improve a product.
What is the engineering process?
A claim must always be supported by this.
What is evidence?
A process in which matter changes from one state to another without changing its chemical composition.
What is a physical change?
A model that shows particles moving faster when energy is added and slower when energy is removed.
What is a molecular motion model?
The type of reaction that releases energy into its surroundings.
What is an exothermic reaction?
The reaction inside a cold pack does this to the thermal energy from its surroundings.
What is it absorbs it?
When energy is transferred from faster-moving molecules to slower-moving ones, this happens.
What is heat transfer?
The principle stating that matter cannot be created or destroyed.
What is the Law of Conservation of Mass?
The type of energy transfer that occurs when a hot object touches a cold one.
What is conduction?
When vinegar and baking soda react, this type of reaction occurs.
What is an endothermic reaction?
The term for the limitations or rules engineers must follow when designing a prototype.
What are constraints?
A technology that uses chemical reactions to absorb or release heat.
What is a chemical hot or cold pack?