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DCAS PHYS SCI REVIEW 2016 LFHS Flashcards | StudBud
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DCAS PHYS SCI REVIEW 2016 LFHS
DCAS PHYS SCI REVIEW 2016 LFHS
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Answers
1
Which of the following is a metal?
Fe
Si
O
He
2
According to the Mohs Hardness Scale, which of these can scratch topaz?
Quartz
Talc
Gypsum
Diamond
3
Which of the following chemical equations is balanced properly?
2H2 + O2 --> 2H2O
C3H8 --> H2O + CO2
H2 + O2 --> H2O
CH4 + O2 --> 2H2O +CO2
4
Using a periodic table, what is the atomic mass of Aluminum (Al)?
14
13
27
26.98
5
What kind of rock is formed from the process to the right?
igeneous
sedimentary
metamorphic
basaltic
6
Using a periodic table, how many protons does Aluminum (Al) have?
27
14
13
26.98
7
The shaded areas show where fossils of land animals were found. What does the evidence suggest?
Thetwo continents were once joined
The two continents were once connected by a land bridge.
Animals developed on the 2 continents at the same time.
The animals swam from one continent to the other.
8
Identical rock & fossil types are found on continents separated by oceans. Best explanation?
Some rock types are very common and arefound everywhere.
The continents were joined together at one time in the past.
The same forces erode mountains indifferent locations.
Organisms traveled between thesecontinents on land bridges.
9
Which of the following has a positive charge?
Protons
All of them
Neutrons
Electrons
10
Which of these best describes the composition of a nebula such as the Crab Nebula?
planets and moons
ice crystals
large asteroids
clouds of dust and gas
11
How many total atoms are found in C
6
H
12
O
6
?
24
12
6
3
12
Obsidian, pumice,and scoria lack crystals because...
theycooled too slowly
theycooled deep inside Earth
theycooled too quickly
notenough minerals were present where they formed
13
A compound is a combination of two or more elements. Which of the following is a compound?
Salt (NaCl)
Iron (Fe)
Aluminum (Al)
Oxygen gas (O2)
14
Which of the following is a nonmetal?
Si
Mg
He
Fe
15
What heat-related action causes the Earth's crust to move?
magnetic fields
hot spots
convection currents
advection forces
16
When observing the periodic table, how are the elements arranged?
By color
Alphabetically
By atomic number
By reactivity
17
Using a periodic table, how many electrons does Aluminum (Al) have?
13
26.98
14
27
18
Using a periodic table, how many neutrons does Aluminum (Al) have?
26.98
27
13
14
19
Water stored behind a dam is an example of what type of energy?
Kinetic
Chemical
Solar
Potential
20
What are the reactants in the equation carbon dioxide + water --> glucose + oxygen?
only CO2
Glucose + O2
all of them
CO2 + H2O
21
Which of the following are found outside the nucleus?
Neutrons
Protons and electrons
Protons
Electrons
22
An element is made of just one type of atom. Which of the following is an element?
Water (H2O)
Aluminum (Al)
Sugar (C6H12O6)
Salt (NaCl)
23
Which of the following are found in the nucleus of an atom?
protons and electrons
electrons only
protons and neutrons
protons only
24
What is the universal force of attraction that each mass exerts on any other mass?
Friction
Gravity
The Moon
Tides
25
What are the products in the equation carbon dioxide + water --> glucose + oxygen?
all of them
Glucose + O2
only O2
CO2 + H2O
26
Using a periodic table, what is the mass number of Aluminum (Al)?
26.98
14
13
27
27
What determines where the different layers ofthe Earth are located?
Density
The moon
Color
Wavelength
28
Which of the following processes will change a sediment into an igneous rock?
Deformation and deposition
Faulting and fracturing
Erosion and deposition
Melting and crystallization
29
Which of the following is a metalloid?
Fe
He
Mg
Si
30
How many different elements are found in C
6
H
12
O
6
?
1
3
12
24
31
How many C atoms are found in C
6
H
12
O
6
?
3
6
24
12
32
Which of the following has a neutral charge?
Electrons
Neutrons
All of them
Protons
33
How does chemical bonding create stability for elements?
gives the element more protons
gives elements more neutrons
gives elements a full valence shell
gives an element an empty valence shell
34
The Mid-Atlantic Ridge exists btwn theAfrican & South American plates. What takes place here?
destructionof underwater mountains
creationof new continents
subductionof geologic plates
spreadingof sea floor
35
Which of the following has a negative charge?
Neutrons
All of them
Protons
Electrons
36
Using a periodic table, what is the atomic number of Aluminum (Al)?
14
26.98
13
27
37
Isotopes are atoms with the same number of ______ but a different number of ________.
electrons, neutrons
protons, neutrons
protons, electrons
none of the options are correct
