Bath Bombs
The substances used a reaction are called ____________ and the substances made in a reaction are called ______________
Reactants, Products
A change a substance goes through that produces a new substance (burning, rust, cooking)
Chemical Change
a substance that is composed of only one type of element or compound
Pure Substance
A limitation or restriction that affects the design process
Constraint
H
Hydrogren
A scale where our eyes cannot normally see
Microscopic
A change a substance goes through that does NOT produce a new substance (boiling, smashing, scratching, melting)
When two or more atoms are chemically bonded together
Molecule
A guideline, goal, or something a design must include or
Criteria
N
Nitrogren
What two properties were used to narrow down potential gases produced by the bath bombs?
Density and Flammability
A type of reaction where heat is lost out of the system into the environment, feels warm to the touch
Exothermic
When the atoms of two or more elements are bonded together
Compound
The first build of a product is often called a ____________
Prototype
Na
Sodium
A term used to determine how likely a substance is to dissolve
Solubility
A type of reaction where heat is absorbed into the system from the environment, feels cold to the touch
Endothermic
A collection of two or more substances that can be separated by physical means
Mixture
What is the first step in the design process?
The problem. Generally, something an engineer produces is to solve a problem. (only need problem to get points)
Cu
Copper
What is the full bath bomb chemical reaction?
Baking Soda + Citric Acid + Water -----------> Carbon Dioxide + Sodium Citrate + Water
When these are broken/formed, energy is released/absorbed in a chemical reactions
Bonds
List as many properties that can be used to separate mixtures by physical means. 100 points for each valid property within 1 minute.
Density, Magnetic, Size, Shape, Boiling Point, Solubility.
a situational decision where improving one design aspect (like temperature or speed) requires sacrificing another (like cost, size, or difficulty to produce)
Trade-Off
Fe
Iron