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Biology Final Exam

QuestionAnswer
Is digesting food in the stomach a physical or chemical change? Chemical change, because new substances are formed.
Rank states of matter by particle distance (Closest to Farthest). Solid → Liquid → Gas
What are two key characteristics of a solid? Definite volume and definite shape.
Water moving through a plant stem is an example of what change? Physical change (water moves without changing identity).
Give two examples of physical changes involving water. Ice melting and water boiling.
Which state of matter has the highest kinetic energy? Gas
What happens to water particles as they boil? They move faster and further apart.
What happens to steam molecules as they cool? They begin to move slower.
Best evidence that iron rusting is a chemical reaction? The surface turns reddish-brown and flakes off.
Does a liquid have a set volume and a set shape? Yes (set volume), No (set shape).
Does a gas have a set volume or a set shape? No (no set volume), No (no set shape).
Give an example of a physical change in the digestive system. Teeth grinding food into smaller pieces.
Evidence that bread baking is a chemical reaction? The dough expands and develops a fluffy texture.
Why is cellular respiration considered a chemical reaction? It involves breaking and forming bonds between atoms.
In a chemical equation, what are the starting substances called? Reactants
In a chemical equation, what are the resulting substances called? Products
Why is juice classified as a liquid? It has a fixed volume but takes the shape of its container.
Two characteristics of a liquid are: Takes shape of container and has a definite volume.
Which process is a physical change: milk souring or ice melting? Ice melting.
Created by: SuttonFamily
 

 



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