Mr. Lenow’s Vocab Vocabulary 8th Grade Science

Question Answer
No Definite Shape, No definite volume. Atoms free to move gas
no definite shape, definite volume. Atoms slide past each-other liquid
definite shape, definite volume. Atoms vibrate in place. solid
super-heated gas that has become electrically charged plasma
explains how particles behave in matter Kinetic Theory
The total energy of the motion of a materials particles Thermal Energy
The average kinetic energy of a material's particles. (How Fast) Temperature
Solid with regular repeating patterns. Have a definite melting Point Crystalline Solid
Solid with no repeating pattern. No definite melting point amorphous solid
The temperature that a solid changes to a liquid Melting Point
The thermal energy required for a solid to melt Heat of Fusion
Resistance of a liquid to flow/pour Viscosity
Spreading of gas particles to fill their container diffusion
Temperature at which a liquid changes to a gas Boiling Point
Energy required to vaporize a liquid Heat of Vaporization
Increase in volume due to heating Thermal expansion
Change in state of matter from one phase to another Phase Change
Solid to a liquid. Absorbs heat Melting
Liquid to a gas throughout a liquid. Absorbs heat. More thermal energy required Vaporization
Liquid to a gas ONLY AT THE SURFACE. Less thermal energy required evaporation
Gas to a liquid. Releases heat condensation
Liquid to a solid. Releases Heat Freezing
Temperature stays the same during this Phase Change
Force exerted per unit area. Measured in Pascals Pressure
Results from gas particles hitting the walls of their container Gas pressure
At constant temp, volume increases as pressure decreases Boyle's Law
At constant Pressure, Volume increases as Temperature increases Charles' Law
When everyone agrees to use the same units of measurement Standard Units
The system used by the scientific community and internationally Metric System
The space/distance between two points distance/length
Metric unit for Length meter
The amount of matter in an object mass
Metric unit for mass gram
Tool used to measure mass Triple Beam Balance
The amount of space an object takes up volume
Metric unit for volume Liter
Tool used to measure volume Graduated Cylinder
The force of gravity on an object Weight
Metric Unit for weight Newton
Tool used to measure weight Spring Scale
Metric Unit for Temperature Celsius or Kelvin
The amount of mass in a certain space Density
Equation for Density D=M/V
The process scientists use to answer questions Scientific Method
This is always stated in the form of a question Problem
1. problem 2. Research 3. Hypothesis
4. Experiment 5. Results 6. Conclusion
6 Steps of the scientific method
An educated Guess. Always in an if/then format hypothesis
What the scientist/you change Independent Variable
What you measure Dependent Variable
What stays the same in an experiment Constant
what you compare your results to. Does not get IV Control
Data and charts/graphs Results
Anything that has mass and takes up space Matter
The smallest particle of matter that still has properties of the element it comes from Atom
Simplest type of matter that cannot be broken down into a simpler substance element
Two or more elements chemically combined in a fixed ratio compound
Two or more substances physically combined in no definite ratio mixture
Mixture that is blended evenly and light can shine through it. Looks the same throughout Homogeneous Mixture
Mixture that is not blended evenly and the different parts are visible Heterogeneous Mixture
Characteristics of a substance that can be observed (5 senses) without changing the identity Physical property
Change in size, shape, or state of matter Physical Change
Characteristics indicating if a something can change chemically. Have to be tested for. Chemical Property
Always produces a new substance Chemical Change
Mass cannot be created or destroyed, it can just change form. Law of Conservation of Mass