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Worksheets7th Grade Science ECA Review
Total questions: 70
Worksheet time: 1hrs 2mins
Name
Class
Date
1.
What is the net force of this system?
a)
10 N -->
b)
0 N
c)
5 N -->
d)
1 N -->
2.
What is the net force of this system?
a)
10 N
b)
0 N
c)
<-- 5N
d)
5 N -->
3.
What is the net force of this system?
a)
0 N
b)
100 N -->
c)
50 N down
d)
100 N up
4.
_____ is how far an object travels in a given time.
a)
Force
b)
Velocity
c)
Speed
d)
Acceleration
5.
_____ is a push or pull on an object.
a)
Force
b)
Speed
c)
Acceleration
d)
Velocity
6.
_____ is the tendency of an object to not change unless acted upon by an outside force.
a)
Mass
b)
Acceleration
c)
Force
d)
Inertia
7.
What happens when two forces act in the same direction?
a)
They cancel each other out.
b)
Their strengths are added.
c)
The stronger one prevails.
d)
Their sum divided by two is the total force.
8.
What happens when two forces act in opposite directions?
a)
They cancel each other out.
b)
Their strengths are added.
c)
The stronger one prevails.
d)
Their sum divided by two is the total force.
9.
Forces can be added only if they are _____.
a)
acting on the same object
b)
unaffected by gravity
c)
balanced forces
d)
equally strong
10.
Forces acting on different objects _____.
a)
can be added together
b)
cancel each other out
c)
do not affect each other
d)
balance
11.
If there is no force acting on an object, it _____.
a)
never changes velocity
b)
will eventually slow down and stop
c)
speeds up
d)
will curve to follow the path
12.
In order for an object to change speed and/or direction (velocity), _____.
a)
there must be a balanced force
b)
there must be an unbalanced force
c)
there can be no force
d)
there must be more than one force
13.
What is the force needed to accelerate a 15 kg object at 3 m/s2?
a)
5 N
b)
45 N
c)
0.2 N
d)
12 N
14.
What is the force needed to accelerate a 25 kg object at 2 m/s2?
a)
50 N
b)
12.5 N
c)
0.08 N
d)
27 N
15.
What is the force needed to accelerate a 5 kg object at 5 m/s2?
a)
0 N
b)
10 N
c)
25 N
d)
1 N
16.
What acceleration occurs when a 10 N force is applied to a 20 kg mass?
a)
200 m/s2
b)
30 m/s2
c)
10 m/s2
d)
0.5 m/s2
17.
What acceleration occurs when a 24 N force is applied to a 12 kg mass?
a)
2 m/s2
b)
12 m/s2
c)
36 m/s2
d)
0.5 m/s2
18.
A train that travels 50 kilometers in 5 hours is traveling at what average speed?
a)
250 kph
b)
45 kph
c)
55 kph
d)
10 kph
19.
A car that travels 1000 kilometers in 10 hours is traveling at what average speed?
a)
10000 kph
b)
100 kph
c)
0.01 kph
d)
Cannot be determined.
20.
A boat that travels 20 kilometers in 0.5 hours is traveling at what average speed?
a)
10 kph
b)
40 kph
c)
0.02 kph
d)
20 kph
21.
A plane that travels 7000 kilometers in 4 hours is traveling at what average speed?
a)
28000 kph
b)
0.0006 kph
c)
3500 kph
d)
1750 kph
22.
An object travels in a straight line, but continues to speed up. What must be true?
a)
The object's speed did not change.
b)
The net force on the object is balanced.
c)
The net force on the object is unbalanced.
d)
The object has decelerated.
23.
An object travels at the same speed, but veers to the right. What must be true?
a)
The object's velocity did not change.
b)
There are balanced forces acting on the object.
c)
There are unbalanced forces acting on the object.
d)
The object decelerated.
24.
An object travels at the same speed and in the same direction. What must be true?
a)
The object changed velocity.
b)
There are balanced forces acting on the object.
c)
There are unbalanced forces acting on the object.
d)
The object slows down.
25.
Which landform is created when two continental plates are colliding with each other?
a)
Canyon
b)
Mountains
c)
Rift valley
d)
Volcanoes
26.
Which landform is created when two continental plates are pulling away from each other?
a)
Canyon
b)
Mountains
c)
Rift valley
d)
Volcanoes
27.
Which landform is created when two ocean plates are colliding?
a)
Canyon
b)
Mountains
c)
Rift valley
d)
Volcanoes
28.
Which of the following events occur quickly once started?
a)
Earthquake
b)
Weathering
c)
Movement of a glacier
d)
Forming of soil from rock
29.
Which of the following events occur slowly over time?
a)
Earthquake
b)
Volcanic eruption
c)
Avalanche
d)
Movement of a glacier
30.
Mountains, volcanoes, rift valleys, and other landforms on the surface of the Earth are _____.
a)
formed by seismic waves
b)
created by forces on Earth's surface
c)
created by fast movements of tectonic plates
d)
formed from slow movements by tectonic plates
31.
At which of these locations would volcanoes likely be formed?
a)
Where two continental plates are pulling away from each other.
b)
Where two oceanic plates are pulling away from each other.
c)
Where two continental plates collide
d)
Where an oceanic plate and continental plate collide.
32.
What type of cells are these?
a)
Plant cells
b)
Animal cells
c)
Bacteria
d)
Viruses
33.
What type of cells are these?
a)
Plant cells
b)
Animal cells
c)
Bacteria
d)
Viruses
34.
What type of cells are these?
a)
Plant cells
b)
Animal cells
c)
Bacteria
d)
Viruses
35.
What types of cells are these?
a)
Plant cells
b)
Animal cells
c)
Bacteria
d)
Viruses
36.
What types of cells are these?
a)
Plant cells
b)
Animal cells
c)
Bacteria
d)
Viruses
37.
What types of cells are these?
a)
Plant cells
b)
Animal cells
c)
Bacteria
d)
Viruses
38.
What is the purpose of the nucleus?
a)
To clean up dead organelles
b)
To hold DNA
c)
To provide energy for the cell
d)
To give structure to the cell
39.
What is the function of the lysosome?
a)
To provide energy for the cell
b)
To hold DNA
c)
To clean up dead organelles
d)
To produce ribosomes
40.
The _____ provides energy for the cell.
a)
mitochondria
b)
nucleus
c)
vacuole
d)
endoplasmic reticulum
41.
The _____ provides structure and support for plant cells.
a)
Cell membrane
b)
Cytoplasm
c)
Nucleus
d)
Cell wall
42.
Which statement is NOT part of Cell Theory?
a)
All cells come from other cells.
b)
Cells are the basic unit of structure and function in organisms.
c)
All cells have cholorphyll.
d)
All organisms are made of one or more cells.
43.
_____ is a process when a cell creates an exact copy of itself.
a)
Meiosis
b)
Mitosis
c)
Cytolysis
d)
Passive diffusion
44.
Mitosis is a process where _____
a)
each new cell has half of the genes of the original cell.
b)
the new cells do not resemble the original cell.
c)
each new cell has an exact copy of the genes.
d)
the new cells are smaller than the original cell.
45.
A scientist decided to see what effect NaCl (salt) would have on bacterial growth. What does this graph of her results indicate?
a)
Salt has no effect on bacterial growth.
b)
All bacteria respond well to salt.
c)
Enteroccocus is not salt tolerant (does not grow well in salt).
d)
Halobacterium is not salt tolerant (does not grow well in salt).
46.
Students in different math classes took a logic test. This is a graph of their scores. Which statement does the graph support?
a)
Calculus students always scored the best.
b)
Pre-algebra students always scored the lowest.
c)
Trigonometry students had the high score for all questions.Pre-
d)
Pre-calculus students had the most consistent score over all questions.
47.
A teacher decided to survey her classes and found this data. Which statement does the data support?
a)
Second graders like ice cream.
b)
Vanilla is the favorite flavor.
c)
Lemon is more favored by 2nd graders than 1st graders.
d)
Everyobdy loves peach!
48.
A scientist decides to study how worms react to various soils. What is he most likely to do first?
a)
Draw a conclusion
b)
Analyze data
c)
Make a hypothesis
d)
Collect data
49.
A conclusion compares experimental results to a(n) _____.
a)
analysis
b)
hypothesis
c)
data table
d)
conclusion
50.
A scientist fails if their hypothesis is rejected.
a)
True
b)
False
51.
Students measured how much oxygen was in different types of water and recorded the results in this data table. What hypothesis was probably being tested?
a)
Freshwater contains more oxygen than saltwater.
b)
Saltwater is warmer than fresh water.
c)
Freshwater is warmer than saltwater.
d)
Water does not hold oxygen.
52.
Using this map, where is the least likely place for earthquakes to happen?
a)
Red Sea
b)
Persian Gulf
c)
Lake Victoria
d)
Nile River
53.
_____ is a change in speed or direction.
a)
Force
b)
Speed
c)
Acceleration
d)
Velocity
54.
What is the net force of this system?
a)
<-- 3N
b)
5N -->
c)
2N
d)
2N -->
55.
What force needs to be added to balance this system?
a)
25 N -->
b)
<-- 50 N
c)
The system is balanced.
d)
50 N -->
56.
How fast an object speeds up is called _____.
a)
force
b)
acceleration
c)
velocity
d)
speed
57.
In which of these locations would new oceanic crust be formed from lava?
a)
Where an oceanic plate is colliding with a continental plate.
b)
Where two oceanic plates are colliding.
c)
Where two continental plates are colliding
d)
Where two oceanic plates are pulling away from each other.
58.
Students used a spring to move blocks and recorded their results over three trials for each block. What can the students conclude?
a)
Block #4 is the heaviest.
b)
More data is needed to make a determination.
c)
There was no difference between the blocks.
d)
There is something odd going on with some of the trials.
59.
Using this map, where is the most likely place for earthquakes to happen?
a)
Palermo
b)
Rome
c)
Florence
d)
Venice
60.
What is the function of the cell membrane?
a)
Provide structure and support
b)
Hold liquids
c)
Keep things in or out
d)
Digest organelles
61.
According to this graph, _____.
a)
when drink sales increase food sales decrease
b)
when drink sales decrease food sales increase
c)
food and drink sales increase and decrease together
d)
there is no correlation between food and drink sales
62.
Which month was the lowest sales month for Product Y?
a)
April
b)
June
c)
July
d)
November
63.
Which day had the smallest change in the number of push-ups?
a)
Monday
b)
Wednesday
c)
Thursday
d)
Saturday
64.
Which two vehicle types make up more than 50% of the survey answers?
a)
car and cycle
b)
car and bus
c)
walk and bus
d)
car and walk
65.
Which browser was used least?
a)
Safari
b)
IE
c)
Chrome
d)
Firefox
66.
What country has the largest land area?
a)
United States
b)
China
c)
Australia
d)
Russia
67.
In which rock type can fossils form?
a)
metamorphic
b)
igneous
c)
sedimentary
68.
Which property is NOT helpful in identifying a crystal?
a)
size
b)
streak color
c)
hardness
d)
transparency
69.
How many meters are in a kilometer?
a)
1
b)
10
c)
100
d)
1000
70.
A scientist collects temperature data for 10 years then determines the climate of the area to be desert. This is an example of _____.
a)
making a hypothesis
b)
making a prediction
c)
drawing a conclusion
d)
publishing results
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