Matter and Scientific Method
What is Matter?
Anything that has Mass and takes up Space (Volume)
What is an Element?
Elements can not be broken down and are made of one type of atom.
Which has the least energy: solid, liquid, or gas?
Solid
What are chemical properties?
The ABILITY of a substance to react with other substances
The starting materials in a chemical reaction are called what?
Reactants
What are the three categories we classify matter into?
Elements, Compounds and Mixtures
What is a Compound?
A compound is made of of two or more elements.
Which has the strongest pull between its particles: solid, liquid, or gas?
Soild
Give an example of a physical property?
Color, length, mass, volume or boiling point
The new materials made are called what?
Products
What is an Atom?
The smallest unit of an Element (Matter)
What is CH₃NH₂ classified as?
Compound
When you heat particles, do the particles move faster or slower?
Faster
What is a physical property?
Can be observed without changing the substance.
Which of these shows a chemical reaction?
a) Rust forming on iron
b) Ice melting
A
Which state of matter has a definite shape and volume?
Soilds
Which is Chemically Combined: Mixture or Compound
Compound
Which has the most space between particles: solid, liquid, or gas?
Gas
What is a chemical change?
When a new substance is made.
What law says mass is not lost or gained in a reaction?
Law of Conservation of Mass
What is the independent variable?
The variable that changes in the experiment
Salt water looks the same all through. Is it a Homogenous or Heterogenous Mixture?
Homogenous Mixture
What happens to the particles when the temperature decreases?
They slow down
Give an example of a physical change?
cutting paper or melting ice
During a chemical reaction, what happens to the bonds between atoms?
They break and then form