Vocabulary
This is the smallest unit of matter. Examples include oxygen, carbon, hydrogen.
What is an atom?
The mass of the open bath bomb system did this when the bath bomb dissolved in water.
What is decreased?
You know a chemical reaction has happened when this is formed.
What is a new substance?
You know a physical change has happened when this does not form.
What is a new substance?
This cannot be done to matter.
What is created or destroyed?
This is multiple atoms connected together. Examples include O2, H2O, and CH4.
What is a molecule?
Mass decreased in the open bath bomb system because this was formed.
What is a gas?
A reaction must have the same amount of this before and after.
What is matter, or atoms?
This is a change in the state of matter. Examples include liquid to solid (freezing) and liquid to gas (evaporation).
What is a phase change?
This is a measure of the amount of matter in an object.
What is mass?
This is anything with mass that takes up space.
What is matter?
A gas that puts out a flame has this property.
What is nonflammable?
A reaction must have the same types of this before and after.
What are atoms?
Example: H2 + O2 --> H2O is possible
H2 + O2 --> CH4 is not possible
This is the chemical formula for the product of water evaporating.
What is H2O?
These are the 3 states (or phases) of matter.
What are solid, liquid, gas?
This is how much matter is contained in a certain volume.
What is density?
A gas that sinks in air has this property.
What is high density?
OR
What is denser than air?
This stays the same during a reaction in a closed system.
What is total mass?
This is the chemical formula for ice.
What is H2O?
This is a measure of how much matter is in a given volume ("volume" means amount of space).
What is density?
These are the characteristics of a substance, which do not change.
What are properties?
These two gases form when electricity is run through water (H2O).
What are hydrogen gas (H2) and oxygen gas (O2)?
The mass of metal increases when it rusts because there is a reaction between these two things.
What are air (specifically O2 and H2O) and metal?
These three things can change without a chemical reaction happening.
What are size, shape, and state of matter?
A bowling ball and basketball are roughly the same size. The bowling ball sinks because it has this amount of matter compared to the basketball.
What is more?