MATTER
What are the three common states of matter?
Solid, Liquid, Gas
(plasma is #4)
What is the process that causes a substance to change from a liquid to a solid?
Freezing
An object should float in a liquid if it is...
Less dense than the liquid
List the parts of an atom.
Proton, Electron, Neutron
A water molecule has the chemical formula H2O. This means that the water molecule is made up of ..
Two hydrogen atoms and one oxygen atom
What is the study of matter called?
Chemistry
What is the process called when you go from a solid to a liquid state?
Melting
The mass of atoms, their size, and how they are arranged determine the __________ of a substance.
Density
What are the charges of a Proton, Electron, Neutron?
Proton = positive; Electron = negative; Neutron = neutral
The atoms in a water molecule are held together by covalent bonds. This means that the bonded atoms ____ electrons.
Share
When you heat a sample of a solid, the particles that make up the solid, do what?
Move faster
Changing from a gas to a liquid is called….
Condensation
The amount of matter in an object is called….
Mass
Where are protons located in the atom?
In the nucleus
The substance being dissolved is called the _________ , and the substance doing the dissolving is called the _____________ .
Solute, Solvent
When you bring two drops of water near each other and allow them to touch, they combine immediately and become one drop. This is mainly because:
Water molecules are attracted to each other
The process of transferring energy by direct contact is called…..
Conduction
Is ice, less or more, dense than water?
Less dense
The atomic number of an atom is….
The number of protons
A paper clip can stay on the surface of a sample of water because of water’s strong surface tension. Water’s surface tension is mostly a result of
The attraction of water molecules
Cooling a solid, does what, to the motion of the atoms.
The motion decreases.
The process of changing to a gas from a solid is called ...
Sublimation
What is the mathematical equation for density?
D=m/v
A covalent bond happens when two atoms share..
Electrons
When a neutral molecule has a positive area at one end and a negative area at the other end, it is called a ________ molecule.
Polar