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8th Grade Science - 1st 9 Wks Test Flashcards | StudBud
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8th Grade Science - 1st 9 Wks Test
8th Grade Science - 1st 9 Wks Test
50 terms
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#physicalscience #periodictable #phscale #electricity #motion
Flashcards
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Questions
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Answers
1
According to the graph, where does the object have the
greatest
speed?
6 - 8 hrs
4 - 6 hrs
2 - 4 hrs
8 - 10 hrs
2
What is the number 112.411 from the picture?
atomic number
atomic mass
number on the periodic table
valence electron number
3
When vinegar and baking soda are combined, what type of change occurs?
Chemical
Physical
4
How does surface texture affect friction?
It increases it
It doesn't affect it
It doubles it
It decreases it
5
A substance with a pH less than 7 is known as a(n)
indicator
lemon juice
base
acid
6
Complete the order of electricity: substation - transformer - ______ - outlet - circuit of lamp
power grid
junction box
distribution line
switch
7
Which of Newton's Laws of Motion is seen here?
3rd
2nd
1st
8
What are the reactants in this equation?
H2 only
H2 + O2
O2 only
H2O
9
Which of Newton's Laws of Motion is seen here?
2nd
3rd
1st
10
Which group in the periodic table is the LEAST reactive group?
Group 1
Group 18
Group 2
Group 17
11
Metals are good conductors of these. (There are 2 correct answers.)
electricity
malleable
heat
ductile
12
What is the product in this equation?
H2 + O2
H2 only
H2O
O2 only
13
What type of data is shown?
Qualitative
Quantitative
14
An ionic bond forms between
2 metals
2 nonmetals
a metal & a nonmetal
Group 1 & Group 2 elements
15
What is shown in this graph?
constant velocity
deceleration
acceleration
no motion
16
What best describes the motion at point B of the graph?
The object is moving with increasing velocity
The object is slowing down.
The object is at rest.
The object is moving at a constant velocity
17
Which of Newton's Laws of motion does this formula represent?
3rd
2nd
1st
18
In the scientific method, this must be testable.
conclusion
hypothesis
experiment
problem
19
This equation shows the chemical process of
glycolysis
cellular photosynthesis
photosynthesis
cellular respiration
20
What is shown in the picture?
CO2 molecule
NaCl2 molecule
NH2 molecule
H2O molecule
21
What is shown in the picture?
step up transformer
step down transformer
electric current
electric circuit
22
Methane
NaCl
CO2
H20
CH4
23
What does this chemical formula stand for?
carbon dioxide
sunlight
energy
glucose
24
Which circuit would produce the brightest light?
both
series
neither
parallel
25
Which side of the periodic table are metals located on?
right
left
26
What type of data is shown?
Qualitative
Quantitative
27
Carbon Dioxide
H20
CH4
CO2
NaCl
28
Water
CO2
CH4
H20
NaCl
29
The tendency of an object to resist changes in its motion is
inertia
mass
momentum
gravity
30
2CH
3
OH + ?0
2
--> 2CO
2
+ 4H
2
O How many molecules of O
2
are needed to balance this equation?
3
5
1
6
31
A substance with a pH greater than 7 is known as a(n)
acid
soap
indicator
base
32
What is the chemical formula for the substance shown?
CO2
Na2Cl
C6H12O6
NaCl
33
To have doubt or mistrust - such as results in an experiment
inference
hypothesis
observation
skepticism
34
Something that you take in with your senses
hypothesis
skepticism
inference
observation
35
A reasonable guess based on prior knowledge
observation
inference
skepticism
hypothesis
36
No movement occurs when forces are
net force
unbalanced
balanced
accelerated
37
This equation shows the process of
cellular respiration
photosynthesis
mitosis
fermentation
38
Which of Newton's Laws of Motion is seen here?
3rd
1st
2nd
39
What is the number 48 from the picture?
number on the periodic table
atomic mass
atomic number
valence electron number
40
A substance that shows whether something is an acid or a base is called a(n)
indicator
litmus paper
acid
base
41
If 8 g of chemical A is mixed with 6 g of chemical B & react, what is the mass of the product?
8g
6g
14g
2g
42
The more mass an object has, the greater the inertia of the object.
True
False
43
Which side of the periodic table is the most reactive? The least reactive?
left; right
bottom; top
right;left
top; bottom
44
Which type of transmission system would be best for a a nuclear power plant to use?
Amps
Ohms
AC
DC
45
What type of change is shown?
Chemical
Physical
46
Hydroelectric power
Renewable
Non-renewable
47
What job does this do?
decreases voltage
decreases electric current
increases voltage
increases electric circuit
48
What type of change is shown?
Physical
Chemical
49
Which group in the periodic table is the MOST reactive group?
Group 1
Group 2
Group 17
Group 18
50
Complete the cell respiration formula: glucose + oxygen --> carbon dioxide + water + ___
ATP
sunlight
methane
oxygen
