Semester Test Flashcards
The shape of an Apple is a
Physical property
Three examples of physical change are?
Boiling of water cutting a wire and crumpling a piece of paper
When a log burns in a fire…
A chemical change occurs
When 2 or more substances are combined so each substance can be separated by physical means the result is a
Mixture
Matter that has a definite volume and a definite shape is a
Solid
Matter in which atoms are tightly held in place is a
Solid
A gas like mixture with no definite volume or shape is made up of positively and negatively charged particles that produce their own light and heat is called a
Plasma
Matter with no definite volume and no definite shape is a
Gas
Matter that has a definite volume but no definite shape is a
Liquid
Matter in which the particles are free to move in all directions until they have spread evenly throughout their container is a
Gas
Most matter ____ when heated
Expands
The theoretical point at which all molecular motion stops is called
Absolute zero
The amount of energy it takes to change a material from a liquid to a gas is called the heat of
Vaporization
According to ____ if you decrease the volume of a container of gas and hold the temp constant the pressure of the gas will rise
Boyle’s law
According to ____ the volume of gas increases with increasing temp as long as pressure does not change
Charles law
The most common state of matter in the universe is
Plasma
Increasing what raises the boiling point of a liquid
Pressure
A fluids resistance to flow is called
Viscosity
As the temp of a gas increases the volume of a gas will what if the pressure remains the same
Increase
As the volume of a gas increases the pressure of the gas will what if the temp remains the same
Decrease
Each inner energy level of an atom has a maximum Number of what it can hold
Electrons
Dot diagrams are used to represent what
Isotopes
Particles of matter that make up protons and neutrons are called
Quarks
A chemical symbol represents the _____ of an element
Name
Horizontal rows on the periodic table are called
Periods
Atoms of the same element with different Numbers of neutrons are called
Isotopes
A particle that moves around the nucleus is a
Electron
Elements that are gases are brittle and are poor conductors at room temp are
Nonmetals
A certain atom with 26 protons and electrons and 30 neutrons would have an atomic mass of
56
A type of radioactive particle that can be stopped by a sheet of paper is the
Alpha particle
The most penetrating type of radiation is the
Gamma ray