Building Blocks
What is matter?
Anything that has mass and takes up space.
Which particle has a positive charge?
Proton
Which state has a fixed shape and volume?
Solid
What tool measures mass?
Balance or digital scale
What is the smallest unit of matter?
Atom
Which particle has no charge?
Neutron
Which state has a fixed volume but takes shape of container?
Liquid
What tool measures volume?
Graduated cylinder
What are atoms made of?
Protons, neutrons, electrons
Which particle orbits the nucleus?
Electron
Which state has no fixed shape or volume?
Gas
What is density?
measure of how much mass is contained in a given unit of volume
What determines what element an atom is?
Number of protons
Where are protons and neutrons located?
In the nucleus
What is melting?
Solid → liquid
Why does an object sink?
It is more dense than the liquid. example: water and oil; oil floats on water because it is less dense than water
What is a molecule?
Two or more atoms bonded together
Which particles are involved in bonding and chemical reactions?
Electrons
What is evaporation?
Liquid → gas
Name 3 physical properties.
Any 3: mass, volume, density, hardness, magnetism, solubility, conductivity, reflectivity