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WorksheetsFall 2019 Semester Exam Review -LFHS
Total questions: 60
Worksheet time: 30mins
Define Endothermic reaction and give an example.
Ice Pack
Candle Flame
Burning Sugar
Rusting Iron
Who was Mendeleev and what did he create?
Vaccines for Rabies and Anthrax
Soda Water
Dynamite
7 Column Periodic Table
How does pressure affect the boiling point of a liquid?
Decreasing pressure raises the boiling point
Increasing pressure lowers the boiling point
Increasing pressure raises the boiling point
Decreasing pressure lowers the boiling point
Define Gas as a state of matter. Give and Example.
matter with specific volume and shape
matter with only a definite shape and not volume
matter with only a definite volume and not shape
matter with no definite volume and shape
Define mixture and give an example.
Mouthwash
Bronze Pipe
Salt Water
Orange Juice
Define Condensation. Give an Example.
Solid changes to a gas.
Gas changes to a liquid.
Liquid changes to a solid.
Solid changes to a liquid.
What group are the Nobel gases located in on the periodic table?
Group 18
Group 1
Group 10
Group 8
Define a physical change and give an example.
Digesting food
Milk going sour
Starting a fire
Carving a wooden animal.
Define density and give the formula to calculate it.
M= d x m
D= m/v
M= d/v
V= m/d
What unit is the SI measure of temperature?
Celcius
Meter
Kelvin
Fahrenheit
Define atomic mass.
# of protons and neutrons
# of protons
# of neutrons
# of electrons
What should you do if you break glass in the lab?
walk away
throw it away in the trashcan
clean it up yourself without telling the teacher
inform the teacher
Which state of matter has the particles closest together?
Solid
Liquid
Gas
Plasma
What is valence electron? Give 2 elements that would have the same number of valence electrons.
Electrons on 1st level. E and P
Electrons on 2nd level. Ca and D
Outer level electron. Cl and F
No electrons. A and L
Why did scientists accept the idea that all things are have atoms when they could not see them?
Scientists realized the idea of atoms explained observations
That's what they were told.
It was Magic
Atom is cool.
What kind of a change is when bubbles are produced as when vinegar is poured into baking soda?
Chemical
Physical
Both Chemical and Physical
Neither
Define a synthesis reaction. 2H2 + O2 --> 2H2O
Two or more reactants combine to make one larger compound.
one element replaces another element in a compound.
Compound breaks down into two/more elements or new compounds
a combination of a substance with oxygen present.
When a substance turns from a solid to a liquid is it a physical or chemical change?
Chemical
Physical
Both
None
What properties do the alkaline family of elements share?
acidic
reactive
nonreactive
nothing
Is soil of pH of 9 acid or alkaline?
acidic
basic
neutral
none of the above
How do the substances on each side of the equation have to be in a chemical equation?
the # of atoms are greater on the reactant side
the # of atoms are greater on the reactant side
the # of atoms are greater on the product side
the # of atoms on either side must be equal
Why is potassium (K) chemically reactive?
0 valence electrons
4 valence electrons
8 valence electrons
1 valence electrons
To make a metal rod fit into a metal cylinder, what would be the best strategy for this to work
heat the rod and the cylinder
cool the rod, heat the cylinder
heat the rod, cool the cylinder
cool the rod and the cylinder
Which lab safety sign is used to represent chemical safety?
poison sign
extreme temperature
open flame sign
electrical sign
Define an ionic bond.
metal bonds with metal
metal bonds with noble gases
nonmetal bonds with nonmetal
metal bonds with nonmetal
Define and exothermic reaction and give an example.
dissolving salt is exothermic and energy is released.
dissolving salt is endothermic and energy is released.
dissolving salt is exothermic and energy is absorbed.
dissolving salt is endothermic and energy is absorbed.
What group and period is strontium (Sr)?
Group 3 Period 2
Group 2 Period 5
Group 1 Period 5
Group 4 Period 4
To make soil more acidic, what would you need to add? look at the table on your review.
limestone and wood ash
manure and sulfur
peat moss and sulfur
wood ash and manure
Which group of elements have luster, are solid, and are good conductors of electricity?
Hydrogen
Oxygen
Magnesium
Manganese
When salt dissolves in what why can you not see the salt?
Salt clumps up because of water.
Salt sinks to the bottom and forms a layer.
Salt breaks apart because its attracted to water.
Salt floats to the top because of the water.
Which target represents precision and accuracy.
1
3
2
none
Describe the process of analyzing data.
Using statistics to compare data and determine relationships
Data is recorded just because.
Scientists do not analyze data.
This is not the answer
When in a lab write up should you include a discussion of the correctness of the hypothesis?
Materials
Procedure
Conclusion
Results
Density is determined by the ratio of what to what?
speed to time
mass to volume
volume to mass
time to speed
How would heating some matter affect its particles?
particles move more slowly
particles stay still
particles move more quickly
If a ruler only shows cm to the tenths place can it be used to measure to the hundredths place?
can guestimate measurement
can only measure in units you have
can measure in kilometers
can't measure anything at all.
What is water in a solid state called?
water
nothing
steam
ice
Balance the following chemical equation. ___ CuCl2 + ___ AL--->___ AlCl3+ ___ Cu
3,2,5,3
3,2,2,3
3,2,2,6
2,3,3,2
What would be the best way to separate a suspension?
separate piece by piece
filter paper
distillation
filtration
Define the law of conservation of mass.
mass of reactants is equal to the products
Mass of the products is greater than reactants.
mass of reactants is greater than products.
none of the above are true.
Define liquid.
does not take the shape of its container
takes the shape of its container
turns to a solid
none of the above
Give some examples of the effects of acid rain.
increase soil nutrients, pH increased
increase soil nutrients, pH neutral
decrease soil nutrients, pH neutral
decrease soil nutrients, materials damaged, pH decreases
Why is water cohesive?
arrangement of Hydrogen bonds
arrangement of Oxygen atoms
arrangement of Nitrogen atoms
arrangement of Sulfur atoms
Define vaporization.
solid to a liquid
solid to a gas
gas to a liquid
gas to a solid
What is an example of a compound.
Florine (F)
Sulfur (S)
Lithium (Li)
Salt (NaCl)
Water is the universal solvent, but list some substances that will not dissolve in water.
salt
acids
sugar
oils
Describe what happens to the particles when a solid melts.
particles pack tightly together
particles break out of their fixed position
particles do not move
none of the above
What is an example of a physical reaction.
rusting iron
burning fire
water freezing to ice
baking a cake
What is an example of a solution?
liquid
elements
substance
homogenous mixture
What does the pH scale measure?
degree of acidity
molarity
temperature
distance
Define liquid as a state of matter.
matter with no definite volume and no definite shape.
matter with a definite volume and a definite shape.
matter with a definite shape but no definite volume.
matter with a definite volume but no definite shape.
Define the lab safety symbol of an eye.
fire safety
animal safety
eye and face safety
chemical safety
Does a compound have the same properties of its elements or does it have new properties?
same properties
not this answer
new properties
not this answer
Scientists use litmus paper to measure pH, which example would turn it red?
NH3
NaOH
HCl
NaCl
Is density a chemical or physical property?
chemical property
neither
both
physical property
Why are noble gases unreactive?
they have 4 electrons on the outer shell and is unstable
They have a full outer shell and is stable
they have 6 electrons on the outer shell and is unstable
they have 2 electrons on the outer shell and is unstable
Define the Law of conservation.
weight of the products = weight of the reactants
weight of the products < weight of the reactants
weight of the products > weight of the reactants
none of the above
The amount of energy required for a liquid at its boiling point to become a gas is___________?
freezing point
melting point
transpiration
heat of vaporization
A mineral with the chemical formula is of Fe2O3 would be what type of molecule?
element
compound
neither
both
What group is Mercury (Hg) on the periodic table?
nonmetal
halogens
noble gases
metal
