P or C
Change
Change
Melting ice is an example of a
What is a physical change
Amount of atoms in H₂O?
What is 3?
(2 H, 1 O)
state of matter has a fixed shape and fixed volume
What is a solid
an element...
A) Water B) Oxygen C) Salt D) Carbon dioxide
What is B)Oxygen
T or F
In order to find Density, I need to know Matter and Volume
What is False
Boiling water is a _____Change. Explain your reasoning.
What is physical
because it changes states from liquid to gas. Nothing new was created.
NaCl has this many atoms
What is 2?
Term for the process of a liquid becoming a gas?
What is Evaporation ?
( Vaporization or Boiling ok)
term for something that contains two or more different elements
What is a compound?
Density of an object that has a mass of 50 grams(g) and a volume of 10 cubic centimeters (cm3)
*Units count!
What is 5g/cm3
This type of change is usually reversible and does not form new substances.
What is a physical change?
Al4LiCl3
Total atoms
States of matter takes the shape of its container but has a fixed volume
What is a liquid
Salt dissolved in water is a
What is a Mixture
Atoms are in
H2SO4
What is 7
The difference between a physical change and a chemical change.
What is a physical change affects appearance without changing the thing; a chemical change creates something new
total atoms are in Fe2S3O12
What is 17 atoms
Unlike solids, molecules in this state move freely and spread out to fill any container.
What is a gas?
This type of mixture has visibly different substances that can be physically separated.
What is a heterogeneous mixture?
When a candle melts and then burns, the melting is a ___ change and the burning is a ___ change.
What are physical and chemical changes?
The 5 indicators of a chemical change
( Will take 3 of the 5 )
HINT : C, T, P, G, L
What is Color Change
Temperature Change
Precipitate Formation
Gas Produced
Light emitted
total atoms are in one molecule of C6H12O6
What is 24
(6 C + 12 H + 6 O)
When a gas changes directly into a solid without first becoming a liquid, this is called:
What is deposition?
Pure substances can be ______ separated, as where Mixtures can be ______ separated
Chemically ; Physically
Justin Bleeber is conducting a calorimetry experiment in chemistry class. He fills an empty soda can with water and hangs it from an iron ring. The can hangs above a cracker that is resting on a stand. Justin uses his striker to light a Bunsen burner. He uses the flame from the Bunsen burner to light a wooden splint. The wooden splint is used to ignite the cracker. As the cracker burns, it heats up the water in the soda can. Waves of gas are seen coming out of the top of the can.
How many chemical changes did Justin observe?
What is 3?
( lighting wood, cracker burns, gas produced)