A change in size, shape, or state. Same substance with same properties.
What is a physical change?
100
type of system where matter is not able to enter or leave
What is a closed system?
100
A chemical reaction that absorbs heat.
What is an endothermic reaction?
100
The ingredients of a chemical reaction; what enters the chemical change.
What are reactants?
100
If your reactants are hydrogen and oxgyen, your prodcuts are these.
What is hydrogen and oxygen?
200
New substance with new properties.
What is a chemical change?
200
Type of system that ALWAYS follows the Law of Conservation of Mass.
What is a closed system?
200
A chemical reaction that releases heat.
What is exothermic reaction?
200
The end result of a chemical change; found on the right side of the arrow.
What are products?
200
The four types of chemical changes.
What are synthesis, decomposition, single replacement, and double replacement?
300
Burning leaves. Defend you answer.
What is chemical change because ash is created (new substance and color) and smoke is produced (gas is given off)?
300
A system that allows matter to enter or exit freely.
What is an open system?
300
True or False: All chemical reactions require energy.
What is true?
300
The arrow in a chemical reaction.
What is yields?
300
What is the order of what happens to the bonds as they go through a chemical change (most of the time)?
What is BROKEN than BUILT?
400
Tearing your homework. Defend your reasoning.
What is a physical change because it is still paper but its' shape has change?
400
The chemical reaction between baking powder (solid), vinegar (liquid) in a plastic bag produces another substance (liquid) and carbon dioxide (gas). Is the mass of the products more, less, or the same?
What is the same?
400
Endothermic or exothermic: Lighting a match. Describe why.
What is exothermic because it is giving off heat?
400
Matter is neither created or destroyed; it simply changes from one form to another.
What is the Law of Conservation of Mass?
400
Process to determine if an equation is balance.
What is count up the number of each element on each side of the chemical equation?
500
Cutting an apple in half and then leaving it out for an hour. Defend you reasoning.
What is both a physical and chemical change because the shape of the apple changed and it turned brown when exposed to the air (new brown colored substance)?
500
You found the mass of a stick of butter. Then you melted the stick of butter carefully in the microwave oven. The mass of the liquid butter is the more, less, or the same as the solid stick of butter.
What is the same?
500
Exothermic or endothermic: Ice cubes melting. Describe your reasoning.
What is endothermic because it requires heat to melt.
500
Used to balance equations; found in the front of chemical formulas.
What are coefficients?
500
The importance of balancing equations.
What is to show the Law of Conservation of Mass and the number of atoms your start with you end with?