Definitions
Mass cannot be created or destroyed in a closed system through ordinary chemical or physical means
What is the law of conservation of mass?
A state of matter without any defined volume or shape
What is a gas?
Positive charge, located inside the nucleus
What is a proton?
In an experiment that is a fair test; the variable that a scientist changes
What is the independent variable?
The force of gravity on an object, changes if you go to another planet
What is weight?
Push or pull on an object that does not cause motion
What is a balanced force?
Made up of one uniform component; often used to describe a mixture with a consistent composition and a single phase throughout
What is homogeneous?
No charge, neutral, located inside the nucelus
What is a neutron?
A factor, trait, or condition that is affected when another factor, trait or condition is changed in a scientific experiment... the data collected
What is the dependent variable?
A change from one state of matter (solid, liquid, gas) to another without a change in chemical composition
What is a phase change?
Distance traveled per unit of time, how fast the object is traveling
What is speed?
A substance in which the parts are clearly different shapes and colors; different throughout
What is heterogeneous?
Negative charge, located outside of the nucleus
What is an electron?
Something you keep the same during an experiment
What is constant or controlled variable?
The process in which matter changes from a liquid to a gas
What is evaporation?
The substance that dissolves another substance
What is a solvent?
A pure substance that is formed when two or more different elements combine; can usually be separated into component elements by chemical reaction
What is a compound?
Proton and neutrons are found here
What is inside the nucleus?
Which popcorn brand pops the most kernels? To find out, we try each brand separately. We use the same amount of popcorn and the same cooking temperature and time. The only thing that changes is the kind of popcorn.
Identify the independent variable.
What is the different popcorn brands?
The process by which a gas changes into a liquid
What is condensation?
The energy an object has because of its motion, energy in motion
What is kinetic energy?
A change in the direction of a wave when it hits a barrier and bounces back
What is reflection?
Outside the nucleus you can find electrons here
What is the electron cloud or shell?
Which popcorn brand pops the most kernels? To find out, we try each brand separately. We use the same amount of popcorn and the same cooking temperature and time. The only thing that changes is the kind of popcorn.
Identify the dependent variable.
What is the amount of kernels that pops?
A chemical reaction; a process that changes substances into new substances
What is a chemical change?