Test UNIT 1 Flashcards
What is matter
Anything that has mass and takes up space
What is an atom
Building block of all matter smallest unit of an element While still having the properties of that element.
What is an element
Specific type of atom
What is a substance
Combination of atoms that make something new
What is a molecule
It is formed when atoms bond together
What pattern do you see between a molecule and an atom
Molecules are made up of more than one atom and the atoms are singular
What Is air made up of an in what percentages
Nitrogen 78%,
oxygen 21%,
Argon 1%,
trace gases less than 1%.
What are examples of air pollution?
Ozone o3,
carbon monoxide,
nitrogen dioxide,
sulfur dioxide,
lead PB
What are causes of air pollution?
Gasoline from cars,
power plants,
burning fossil fuels, and
industry
How does changing the composition of the air with pollutants affect air quality
Toxic air can cause:
Cancer
kidney problems in children
coughing and
shortness of breath
How are molecules arranged in solids?
They have a definite shape, and a definite volume
How molecules move in a solid?
Molecules vibrate
How are molecules arranged in a liquid?
They have no definite shape
but a definite volume
How does the molecules in a liquid move?
They move freely but not to freely
How are molecules arranged in a gas?
They have no definite shape or
a definite volume
How do molecules move in a gas?
Particles in molecules move in random Motion
What is density
How tightly packed atoms and molecules are in something
What are the states of matter from most to least dense?
Solid, liquid, and gas
How does a substance turn from a solid to a liquid?
Heat is applied which causes the molecules to vibrate faster until they begin to break free and move around.
The movement takes away the definite shape and the the solid begins to melt into a liquid
How Does a substance turn from a liquid into a gas?
More heat makes the particles move faster making the liquid lose its volume is as it heats into a gas.
What happens to water at the molecular level during phase changes from solid to liquid and liquid to gas?
Molecules in the water begin to move around more quickly as water changes from a solid to liquid and even more quickly as it changes from a liquid to a gas
What is the periodic table of elements contain
It’s a table of all the types of atoms that have been discovered
How can you do 118 atoms and have millions of molocules that are different?
Just like the 26 letters they can all be combined in different ways to make millions of molecules
Can too much oxygen be bad?
Yes too much oxygen gives you oxygen toxicity
What are some trace gases and what are some of their uses?
Ozone In the upper atmosphere it blocks ultraviolet radiation in the lower atmosphere it is pollution
Methane greenhouse gases trapping earths heat in the atmosphere
Other gases include helium water vapor carbon dioxide and hydrogen
