Gen Review
Measuring Matter
Changes in Matter
Types of Matter
Methods of Extraction
100
Name two reasons why compounds and mixtures are different?
Compounds are chemically bonded, in a fixed ratio, new properties from original components, new substance, takes a great a deal of energy to separate. Mixtures are present in the same area, not chemically bonded in a new substance, keep their individual properties, not in specific ratios, can be separated through low energy processes
100
Anything that has mass and takes up space is _______?
matter
100
If you heat a liquid and it becomes a vapor what type of change is occuring?
physical change
100
Au (Gold)
Element
100
Gold can be separated from other substances through a method called... which uses the physical property of ... to separate the gold from the other materials.
panning... density
200
Who was the Greek philosopher who first wrote his ideas on atoms (A) and what did he call them (B)?
Democritus and atomos
200
Measurement of how much matter is contained in a given space
density
200
explosion of fireworks- chemical or physical?
chemical
200
NaHCO3 (Sodium Bicarbonate)
compound
200
Some elements can be separated from their compound through electrical cutting called.... which cuts the .... between the elements.
electrolysis... chemical bond
300
Atoms are very dense. There isn't a lot of space inside them. True or False?
False- atoms are mostly made of empty space
300
An object has a mass of 50g and a volume of 10 cm^3. What is the object's density?
5 g/cm^3
300
Egg salad going bad (rotting)
chemical change
300
pyrite (fool's gold)
compound
300
When using the blast furnace, Iron can be separated from its ore through adding ___________ and __________.
heat and coke (carbon)
400
The force that holds two atoms together?
chemical bond or bond
400
An object has a mass of 144 g and a size of 2 cm * 2 cm * 3 cm. What is the object's density?
12 g/cm^3
400
shattering a window
physical change
400
Ocean Water
mixture
400
Name two methods that can be used to separate the components of a mixture and identify the type of change for each.
chromotography- physical electrophoresis- physical dialysis- physical
500
Name 6 of Dalton's points on Atomic Theory - tie breaker- which two are currently known to be incorrect?
1. Atoms can't be broken into smaller pieces. 2. In any element, all the atoms are exactly alike. 3. Atoms of different elements are different. 4. Atoms of two or more elements can combine to form compounds. 5. Atoms of each element have an unique mass. 6. The masses of the elements in a compound are always in a constant ratio.
500
If an object's mass is 35g and its volume is 5mL was is the total density? (A) and what would happen to the density if I increased the volume (B)?
density = 7 g/mL Density would decrease: the amount of space for the same amount of mass would increase causing the object to become less packed or dense.
500
What describes a chemical change?
A new substance is formed with new properties.
500
Concrete
Concrete is a mixture of lime (CaO), cement, water(H2O), sand, and other ground-up rocks and solids
500
Identify the type of change occurring in all 3 methods of compound extraction we discussed. List the method and then the change.
Panning- Physical Electrolysis- Chemical Blast Furnace- Chemical
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