the state of matter with a definite volume but not a definite shape
liquid
100
the basic, smallest unit of matter
atom
100
a combination of two or more substances in which each substance keeps its own properties and can be physically separated from the other is a __________
mixture
100
Atomic number or atomic mass? the number of protons in an atom
atomic number
100
Is water organic or inorganic?
inorganic
200
the state of matter with a definite shape and volume
solid
200
a type of matter made up of only one kind of atom
element
200
the part of a solution that is being dissolved is the _________
solute
200
the particles involved in bonding
electrons
200
True or false: Water keeps the size of your cells stable.
False. Water keeps temperature of cells stable.
300
Matter comes in three states: solid, liquid, or _________.
gas
300
when atoms chemically bond together, they form this
a molecule
300
in a _____________, two or more substances are chemically combined into a pure sustance
compound
300
Atomic number or atomic mass? the number of protons and neutrons in an atom
atomic mass
300
Is DNA organic or inorganic? Why?
Organic, because it has Carbon and Hydrogen in it.
400
solid --> liquid is the process of _________
melting
400
a complete _____________ ____________ makes an atom stable, which is a good thing for the atom
valence shell
400
True or false? Pure substances can be separated after they have been combined.
True (such as elements and compounds)
400
These are the particles on the outermost shell of an atom.
valence electrons
400
Name a physical change.
dissolving, melting, freezing, being chewed
500
liquid ---> gas is the process of _______
evaporating
500
Correctly name the 6 elements that make up 99% of all life.
True or false? In a suspension, the substances in a liquid or gas do not settle over time.
False - in a suspension, they do settle eventually (they do NOT settle in a solution)
500
In an atom with more protons than electrons, what kind of charge is there?
positive
500
Correctly name one reason ions are important to your body.
1. they send messages along nerve cells as potassium and sodium, 2. they move muscles using calcium ions, and/or 3. they transport oxygen through the blood