What's the Matter?
Define matter.
Anything that has mass and takes up space
Molecules move slowest in
Solid
Liquid
Gas
solid
What is the equation to find density?
d=m/v
Part A: Find the perimeter of a square that has one side that is 7.9 cm on one side and 8.6 cm on another
Part B: Find the area
33 cm
67.94 cm2
Triangles use squares and look like their relatives?
Question 1: Does the Pythagorean Theorem work with all triangles? If not, when can you use it and what is it?
The Pythagorean Theorem only works for right triangles (triangles with a right angle). It is the relationship of the sides of the right triangle. a2 + b2 = c2 where a and b are the lengths of the legs (sides that make up the right angle) and c is the hypotenuse (side opposite the right angle – the longest side.)
What is the smallest particle of living and non living things?
Atom
Gold has a very high melting Point. Is this a physical or chemical property? Why?
physical.. It's still gold
True or False: Melting point is determined by the amount of energy given to a molecule or compound to create a phase change?
True the amount of energy needed to break bonds between atoms of molecule or compound causes the substance to melt.
question 2
42 cm
question 2
C2 = 41
State 2 facts about an atom and an element?
An atom is the smallest particle of an element and makes up all matter.
An element is made of one or more atoms of the same matter.
Boiling point depends on?
a. temperature
b. air pressure
c. type of bonds between atoms
d. all of these
d. all of these
How do molecules in each a solid, liquid and gas behave?
Which has the most energy?
Solid = particles move back and forth, but are in a fixed position. Volume is maintained.
Liquid = Volume is constant; particles slide past one another
Gas = Heat causes bonds to be broken between particles in a liquid; no specific shape or volume
Gas particles have the most energy
question 3
66 cm2
question 3
?2 = 300
What determines the phase or state of matter?
Heat/temperature
Density is the ? and the ? of matter. What is the equation to find density?
Mass; volume D=M/V
What are two categories of matter?
explain the difference
A pure substance is made up of the same atoms
A compound is made of the same molecules
Question 4
30 in2
question 4
x = 14
y = 24
What is the difference between dissolving a substance and the solubility of a substance?
Dissolve means a substance breaks apart in a liquid.
Solubility is how much of a substance will dissolve in a liquid.
Name 5 physical properties then 3 physical properties that change when the substance is decreased or increased.
Physical = color; bp; mp; volume; wt.; shape; mass; size; state; smell
Weight; Volume; mass
What is the difference between a compound and molecule?
Give an example of each
A molecule can contain multiple different or like elements bonded together; a compound is a type of molecule, but has two or more different elements.
Ex. O2 is a molecule not a compound
H20 is a molecule and a compound
Question 5
36 in
question 5
40.375