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WorksheetsUnit 3 Review
Total questions: 71
Worksheet time: 18hrs 32mins
Yeimel is describing the physical properties of his new gaming chair. Which two physical properties can he determine without using any measuring instruments?
taste and odor
volume and temperatue
texture and color
shape and mass
Element
Compound
Homogeneous Mixture
Heterogeneous MIxture
What is it?
Pure Substance
Mixture
What is it?
Pure Substance
Mixture
When there is 2 or more atoms combined together
Element
Compound
Homogeneous Mixture
Heterogeneous Mixture
A group of 2 or more items, that are not chemically combined
Pure Substance
Mixture
Which term describes when a substance is changed from a liquid to a gas?
Condensation
Evaporation
Filtration
Precipitation
Sand and salt are placed in the bottom of a beaker filled with water. The beaker is heated, and the water is stirred.
What will happen to the salt and sand?
The sand and salt will settle to the bottom.
The sand and salt will dissolve in the water
The salt will dissolve, and the sand will settle
The sand will evaporate, and the salt will dissolve.
The central region of an atom where its neutrons and protons are is called it's __________ .
nucleus
electron cloud
core
center
All matter is made of what
energy
atoms
electrons
compounds
_________ is a pure substance that is made from a single type of atom.
Atom
Element
Compound
Mixture
What is water (H2O)?
element
compound
mixture
This picture is water...what two things are true about it.
atom
element
molecule
compound
Which part of an atom is POSITIVELY charged?
protons
neutrons
electrons
atoms
What part of an atom is NEGATIVELY charged?
protons
neutrons
electrons
atoms
Which part of an atom has no charge?
protons
neutrons
electrons
atoms
a substance that cannot be separated or broken down into simpler substances by chemical means
element
volume
neutron
mass
Which of the following is an element?
salt
oxygen
vinegar
water
How is an element different from a compound?
an element is highly reactive, and a compound is stable
an element exists in any state, and a compound is only a liquid
an element contains multiple substances, and a compound contains only one pure substance
an element is made of a single type of atom, and a compound is made of two or more atom types
Which elements in the periodic table have similar properties?
a metal and a noble gas
a metal and a non metal
two elements in the same group
two elements in the same period
Based on the periodic table of elements, which of the following sets of elements have similar properties?
Pb, Sn, Kr
Ne, N, O
Cl, Br, I
O, S, N
What is the atomic number of an element based upon?
mass of it's nucleus
number of electrons around it's core
number of protons in its nucleus
number of neutrons in its nucleus
A student notices that a basketball seems to act differently depending on whether the game is being played on a court with a wooden floor, on a concrete driveway, or on a blacktop in the park. they student hypothesizes that the surface on which a ball is bounced affects the height of the bounce.
How can the student design an experiment to test the hypothesis?
The student should drop the same ball from 3 different heights and have someone measure the height of each bounce
The student should drop 3 different balls from the same height and have someone measure the height of each bounce
The student should drop the same ball from the same height on 3 different surface and have someone measure the height of each bounce
The student should drop 3 different balls from the same height on 3 different surfaces and have someone measure the height of each bounce
Ena is measuring the pH of various liquids to see if they are acids or bases. Although she is following the same procedure each time, she notices that when she tests a particular liquid she obtains results she does not expect. She is not sure that the result is accurate.
What should Ena do to improve the reliability of the data she collects?
change her hypothesis
perform repeated trials on each liquid
measure a smaller volume of each sample
research more information about acids and bases
Devin is doing an investigation to address the question of how temperature affects the rate of crystal growth. He has 6 jars and adds the same amount of warm water to each jar. Then he adds salt to each jar, enough to make a saturated solution, and stirs until the salt dissolves completely. He observes the jars for several days.
Which experimental design allows for the collection of the evidence Devin needs to address this question?
He leaves all 6 jars on the counter and records the temperature and day the crystals appear
He puts all 6 jars in the fridge, and records the day and temperature the crystals appear
he puts 3 jars in the fridge and 3 jars at room temperature and, records the day the crystals appear
He puts 5 jars at room temperature and 1 in the fridge, and records the day the crystals appear
What would happen to blue litmus paper if it came into contact with an acid?
It would turn red
It would turn green
It would stay blue
It would turn pink
Which of the following pH values would be the weakest acid?
1
3
5
6
A substance is found to have the following characteristics:
Very bitter taste
Feels slippery to the touch
Produces OH- ions when dissolved in water
In what category would the substance be classified?
acid
base
enzyme
fatty acid
Which option below places the pH values in the correct order, from WEAKEST ACID to STRONGEST ACID?
1,4,5,6
6,4,3,1
7,9,11,14
13,12,10,8
A substance that produces hydroxide ions (OH-) in solution is a
Acid
Base
Neutral
Bitter
A substance that produces H+ ions in solution is a (n)
Acid
Base
Neutral
sour
Lemons and pickles taste sour, this property indicates that they are __________.
Acids
Bases
Neutral
None of the above
What does pH measure?
the amount of hydrogen (H+) ions
the amount of hydroxide (OH-) ions
amount of water
all of the above
Which of the following is a heterogeneous mixture?
salt water
sugar water
soda
beach sand
A chocolate chip cookie is an example of:
Substance
Compound
Homogeneous mixture
Heterogeneous mixture
A pure substance containing two or more types of elements that are chemically combined is called?
Mixture
Element
Compound
Solution
Elements and Compounds are classified as _______.
Heterogeneous mixtures
Homogeneous mixtures
Pure substances
Unpure substances
What is the smallest unit of matter?
A cell
An atom
A particle
A compound
NH3 is a:
Mixture
Element
Compound
Particle
acidic or basic.
Which element has properties similar to Calcium (Ca)?
Sodium
Magnesium
Potassium
How many neutrons can be found in an atom of Na (Sodium)?
12
11
22.99
23
Which color on the image of the periodic table corresponds with the alkaline earth metals?
blue/green
teal
yellow
dark yellow
What subatomic particle is positive and found in the nucleus?
electron
proton
neutron
quark
What are the red elements (those on the left)?
metals
nonmetals
metalloids
What are the blue elements (those on the right)?
metals
nonmetals
metalloids
What subatomic particle is negative and found outside the nucleus?
proton
neutron
electron
How many elements are on the current periodic table?
63
108
118
128
What is the atomic number of Barium, Ba? (enlarge the periodic table)
20
38
56
88
If an atom has 10 electrons, how many protons does it have?
0
1
10
5
An element has the mass number 12 and atomic number 6. The number of neutrons in it is:
6
10
4
8
Which of the following is a true statement?
Periods form horizontal rows; groups form vertical columns
Groups form horizontal rows; periods form vertical columns
Categories form horizontal rows; gases form vertical columns
Gases form horizontal rows; categories form vertical columns
The horizontal (side to side) rows in the Periodic Table are called
groups
families
periods
atomic numbers
The vertical (up and down) columns in the Periodic Table are called
groups
towers
periods
atomic numbers
Olivia had a beaker with a small amount of baking soda. She added a few drops of vinegar to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Vanessa determine about the new substance formed by mixing the baking soda and vinegar?
It was hot.
It was a gas.
It was magnetic.
It was a conductor
The brown color of a cut apple can be called
physical change
chemical change
evidence of chemical reaction
all of the above
Control variables are
the variables that are changed by the scientists
the variables that measure the effect of the independent variable
the variables that stay the same in an experiment
not important in an experiment
Which statement best describes physical properties?
physical properties behave identically for all matter under the same conditions
physical properties can be observed without changing the identity of a substance
physical properties are observed by seeing how a substance reacts with other substances
physical properties cause atoms and and molecules to change structure when substances are mixed
