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8th grade semester 1 Final Review Flashcards | StudBud
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8th grade semester 1 Final Review
8th grade semester 1 Final Review
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8th grade semester 1 science review: scientific method, chemistry, and history of planet earth
Flashcards
38 cards
F
Practice quiz
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Host live
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Questions
38
Answers
1
What type of matter is this? (choose the best answer)
heterogenous mixture
compound
element
solution
2
The atomic number is the same as the number of __________________
protons plus the number of neutrons
just the number of protons
just the number of neutrons
the number of protons plus the number of electrons
3
Looking at the Element box, what does the 6 represent?
elemental number
net charge
atomic mass
atomic number
4
If I am doing an exp. on if the number of Mentos affects the amt. of explosion, this is my
DV
.
the amount of explosion
the size of the pop bottle
the type of pop
the number of Mentos
5
The molecules in the picture below most likely represent what state of matter
solid
liquid
plasma
gas
6
Column 18 is known as the
noble gases
halogens
alkali metals
transition metals
7
The atomic mass is the same as the number of protons plus ______________
electrons
atoms
valences
neutrons
8
This diagram shows that trilobites and fish evolved _____________ the dinosaurs existed.
at the same time as
before
after
9
What is the reading on this thermometer?
-2.5
2
2.5
-3
10
fossils of freshwater trilobites were found on the SW coast of Africa & where else most likely
Eastern coast of South America
eastern coast of the US
Western Coast of Europe
Western Coast of South America
11
This is the San Andres Fault. What type of boundary is it?
convergent
transform
subducting
divergent
12
This picture shows atoms bonding because they are sharing electrons. What type of bond is it?
Ionic Bond
Metallic bond
Barry Bonds
Covalent bond
13
What is the volume of this hammer?
65ml
40mL
4mL
69mL
14
This diagram showing the pattern of magnetic rocks in the sea floor is the best evidence that
sea floor is randomly magnetic
sea floor is collapsing
sea floor has no volcanic activity
sea floor is spreading
15
which of the following represents the 3 molecules shown below?
C
A
D
B
16
What type of matter is this? (choose the best answer)
molecule
element
mixture
compound
17
All the elements in column 18 all
have no electrons in their outer layer
have 3 orbitals or valences
have full outer electron shells
have 2 electrons
18
Which of the following is
not
a form of evidence that Pangaea existed?
rock layers
asteroids
fossils
puzzle-like fit
19
Which of the following represent chemical changes?
glass breaking
ice melting and rusty nails
ice melting
rusty nails
20
What is the volume of the cube below that is 3 cm by 3cm by 3cm.
9cm3
30cm3
12cm3
27cm3
21
What type of matter is this?
heterogenous mixture
homogeneous mixture
compound
element
22
If I am doing an exp. on if the number of Mentos affects the amt. of explosion, this is my IV.
the number of Mentos
the type of pop
Amount of explosion
the size of the pop bottle
23
which of the following equations is balanced
B
A
C
None of the above
24
The law of conservation of mass states that matter cannot be __________
transformed
created or destroyed
eaten
change states
25
Which of the following represent physical changes?
Toast
toast and frying eggs
cracking eggs
Frying eggs
26
What is the density of a cube that has a volume of 9cm
3
and a mass of 27g ?
3g/cm3
9g/cm3
7g/cm3
6g/cm3
27
How many valence electrons are in this atom?
0
7
2
5
28
The picture shows that the newest layers of rock are at the
mid-atlantic ridge
African desert
Eurasian Plate
North American Plate
29
The periods represent the_____________
total number of electrons
the type of element it is
the number of energy levels
the number of electrons in the valence layer
30
What type of matter is this? (choose the best answer)
solution
homogeneous mixture
compound
element
31
The group represents the _______________
the number of electrons in the valence layer
total number of electrons
the type of element it is
the number of energy levels
32
What is the atomic number of this atom?
12
32
6
18
33
what is the mass on the balance below?
210.1g
210.05g
210.5g
200.5g
34
Whatis the net charge of an element that has 6 protons, 7 neutrons, and 9 electrons
+3
-1
-3
+2
35
What type of matter is this? (choose the best answer)
homogeneous mixture
solution
element
compound
36
which of the following equations is balanced
C
A
None of the above
B
37
The blue arrow on the right represents ___________ as the energy ___________
Freezing, increases
evaporating, increases
condensing, decreases
boiling, decreases
38
What is the atomic mass of this atom?
32
18
12
6
