WorksheetsFinal 8th Gr. 2022
Total questions: 40
Worksheet time: 21mins
A(an) ____ is the particle known as the building blocks of matter.
compound
molecule
atom
A (an) _____is a chemical substance that is made up of two or more different kinds of atoms bonded together.
compound
molecule
atom
A (n) ____ is the smallest particle of a substance that is made up of two or more atoms.
atom
compound
molecule
When a solid suddenly appears in a solution and settles to the bottom, collects on another object, or makes the solution cloudy a _____.
physical change occured
precipitate formed
chemical change occured
A change in matter that produces one or more new substances is a ______.
chemical change
physical change
chemical reaction
combustion
How many atoms of each element are in this formula: 2C2H6
two
C=4; H=12
eight
C=2; H=6
The arrow in the middle of a chemical equation is known as ____.
reactant
product
yield
A lamp sitting on a table is a balanced force?
True
False
A car accelerating around a mountain curve is balanced.
True
False
A rocket lifting off the launch pad is balanced?
True
False
Two ice skaters moving at a constant speed are a(an) ____.
unbalanced force
balanced force
The definition of force is a push or a pull on an object.
True
False
When two or more forces that are not equal and opposite of one another; but can cause a change in motion is known as
position
unbalanced force
direction
A path that a moving object follows is ____.
acceleration
direction
deceleration
The sum of all forces acting on an object is known as its
net force
force
Iron rusting is a physical change.
True
False
Which of the following are examples of chemical changes?
leaves changing color
high body temperature
wood burning
all answers are correct
A representation of a chemical reaction that uses symbols to show the relationship between the reactant and the product is a Chemical Equation.
True
False
What is the equation/formula for speed?
F=ma
A=t(Vf − Vo)
S=td
How many seconds will it take for a satellite to travel 360km at a rate of 120m/s?
12m/s
3m/s
2m/s
What is the speed of a jet plan that travels 500 meters in 4 seconds?
20,000 m/s
500 m/s
125 m/s
Which of the following best describes the velocity of an object?
50 m/s
50 m east
50 ms^2
50 m/s east
Acceleration is measured in ____ units?
m/s^2
m/s
mph
Acceleration on a distance time graph show up as a ____ line.
straight diagonal
straight horizontal
curved
Speed on a distance time graph shows up as a straight ____ line.
horizontal
diagonal
vertical
No motion on a distance time graph shows up as a straight ____ line.
horizontal
diagonal
vertical
What is the formula/equation for work?
S = td
W = fd
F = wd
A ____ is made of two incline planes put together.
screw
lever
wedge
A ____ uses a wheel and rope to change the direction and/or foce of an object.
wheel
pulley
ramp
Which of Newton's Laws of Motion explain a rocket's movement during a launch?
Newton's First Law
Newton's Second Law
Newton's Third Law
Newton's 2nd Law of motion says the acceleration of an object depends on its mass and force.
True
False
A rollercoaster heading down a hill is ____.
speed
acceleration
velocity
The process of changing energy from one form to another is known as _____.
Transfer
Transmission
Transportation
Transformation
The Law of Conservation of Energy states that, "Energy can neither be destroyed nor created." According to this laws which one of these equations is correct?
E=mc2
KE = PE
Energy in = Energy out
Energy = Power
The Kinetic Energy forms are : Mechanical, Radiant, Electrical, and Sound.
True
False
Energy that is transferred in waves or particles is
Radiation
Convection
Conduction
Energy that is transferred through a fluid where hot rises and cold sink and cold sinks.
Radiation
Convection
Conduction
A car traveling at 65 mph is an example of its...
acceleration
velocity
speed
The amount of work applied to an object being moved 20m using 40N of force is ____.
80J
60J
800J
The potential forms of energy are: Mechanical, Chemical, Nuclear, and Electrical.
True
False
