A
B
C
D
E
100
what is dark matter?
dark matter is the unseen matter providing the mass needed to explain observations
100
what is a force?
a push or pull
100
what does temperature do?
determines the state of matter
100
what is matter?
anything that occupies space
100
3 kinds of measuring matter?
mass, weight, volume
200
what is an atom?
the smallest building block of matter
200
what are the two kinds of matter?
pure substances & mixtures
200
what is energy?
the ability to do work
200
the 4 types of states of matter
liquid, solid, plasma, gas
200
2 kinds of energy?
kinetic and potential
300
what is crystalline?
when lots of particles join in a repeating pattern
300
what is a crystal?
a solid shape with a regular flat face
300
types of forces (5)
contact, field, magnetic, electrical, gravitational
300
parts of an atom
nucleus, proton, electron, neutron
300
what is a compound?
a pure substance always containing the same elements
400
the equation
D = M/V = .g/ml
density equals mass over volume
400
what is a chemical element?
a pure substance made of on kind of atom
400
what are the 3 changes in matter?
physical, chemical, and nuclear
400
what is an atomic number?
elements identified by their names
400
what is work?
a force that acts on an object when work is done on it by a force
500
7 sources of energy
thermal, sound, electrical, magnetic, chemical, light, nuclear
500
states of matter in order (if possible)
melting/freezing, vaporization/condensation, boiling, evaporation, sublimation/deposition
500
identify each chemical element; He, Ne, Ar, O2, S8, CH4
Helium, neon, argon, oxygen, sulpher, methane