TEAS 7 - Science (States of Matter and Phase Changes) Flashcards
A ___ is a state of matter that has a definite shape and volume because the bonds between the molecules or atoms within the structure are strong
solid
When the particles of solids are in a regular arrangement, what are they called?
crystalline
A ___ is a state of matter that has an indefinite volume and shape because there are usually no bonds between the molecules or atoms within the substance.
gas
A ___ is a state of matter that has a definite volume but an undefined shape because there are weak bonds between the molecules or atoms within the substance
liquid
Solids have a definite ___ and ___, the substances have high density, and the particles do ___ flow around.
shape
volume
not
What are the most common states of matter?
solid, liquid, and gas
The state of matter of a substance depends on the strength of the ___ ___ between its particles.
intermolecular forces
The ___ is the quantity of matter in a particular unit or amount of volume.
density
When the particles of solids are in an irregular arrangement, what are they considered to be?
amorphous
Solids can be crystalline if the particles follow a ___ arrangement and amorphous when the particles have an ___ arrangement.
regular
irregular
The ___ ___ ___ are the different phases or states in which matter can exist.
states of matter
When matter is in a ___ state, the particles are very close together, joined by strong intermolecular forces.
solid
The compressibility of solids is ___ because the particles are already close together. This basically means that they ___ easily be “squished down.”
low
cannot
___ ___ are forces of attraction that bond molecules with other molecules
Intermolecular forces
In a solid state, what is the strength of intermolecular forces?
strong
In a liquid state, what is the strength of intermolecular forces?
liquid substances are still joined by intermolecular forces, but they are not as strong as solids.
Liquids have a ___ volume and an ___ shape and typically take on the shape of their container.
definite
indefinite
Liquid substances are still joined by intermolecular forces, but they are not as strong as in ___.
solids
Think about the different types of containers we use with water. The water always takes the ___ of the specific container we put it into.
shape
Liquids have ___ compressibility (can’t “squish” it easily) and ___ volume (the volume of the liquid doesn’t change).
low
defined
In a gaseous state, what is the strength of intermolecular forces?
very weak
Gases have particles that have very ___ intermolecular forces.
weak
Gases are also ___ compressible (they can be easily “squished down”). This means that they can also expand if the size of the container changes.
highly
Gases have particles that have very weak intermolecular forces, which means that gases have an ___ (undefined) shape and volume.
weak
indefinite