Structure of Matter
What do you call anything with mass that takes up space?
Matter
In which state of matter do molecules move the fastest?
GAS
What is a phase change?
When matter changes from one state to another
physical
what do you call the items that go into a chemical reaction?
reactants
What is the basic unit of elements or nonliving things?
Atoms
Which state of matter typically has atoms condensed to the most dense form?
solid
What do you call the phase change from liquid to gas
vaporization or evaporation
Is baking a cake a physical or chemical change?
chemical
What do you call the items that are made from a chemical reaction?
products
What are the 3 common states of matter?
solid, liquid, gas
Which state of matter has atoms sliding past one another?
liquid
What do you call a state change from solid to liquid
melting
If you take dirt and add water to make mud, is that a physical or chemical change?
physical
What is created during a chemical reaction or change?
New substances
What do you call just one type of atom?
an element
If you continue to add thermal energy to a liquid what will happen?
it will turn into a gas
What type of energy is thermal energy?
Heat
What are some signs a chemical change has occurred?
change in color, odor/gas, new substance formed, thermal energy change
Explain the law of conservation of mass
Mass cannot be created or destroyed
Do all substances become more dense when they become a solid? Give an example
No, water is less dense which is why it floats in water
What is sublimation?
When a substance goes from solid to gas
Condensation is a state change from ______ to ______
gas to liquid
is rust or tarnish a chemical or physical reaction?
chemical
What is an exothermic reaction?
a reaction that produces heat