Machines
A push or pull
Force
The force that you overcome is ___________.
Resistance
The ability of matter to do work is called ___________.
Matter
A __________________ is made up of several simple machines.
Compound Machine
A __________ is a change of in a gene.
A. Adaptation
B. Mutation
C. Natural Selection
D. Evolution
E. Convergence
B. Mutation
What is the pull that Earth has on you and all other objects?
Gravity
A device used to do work.
Simple machine.
A __________ is when a moving object strikes another object.
Collision
Momentum depends on an object's:
A. Weight and Circumference
B. Weight and Speed
C. Speed and Circumference
D. Weight and Trajectory
B. Weight and Speed
A trait that makes a plant or animal better able to live in its environment is called an _________.
A. Adaptation
B. Mutation
C. Natural Selection
D. Evolution
E. Convergence
A. Adaptation
A force between surfaces that touch each other is known as ____________.
Friction
What is a bar that turns on a pivot?
Lever
The measure of the motion of an object is called _______________.
Momentum
Gravity, magnetism, and friction are all examples of
A. Forces
B. Energy
C. Elements
A. Forces
______________ is the independent evolution of similar characteristics among unrelated organisms.
A. Adaptation
B. Mutation
C. Natural Selection
D. Evolution
E. Convergence
E. Convergence
What is done when a force cauasese an object to move?
Work
The number of times a machines multiplies your effort is called the ______________.
Mechanical Advantage
Something that is _________ can be stretched or compressed.
Elastic
Which of the following is an example of a lever?
A. Doorknob
B. Crowbar
C. Doorbell
D. Seesaw
B. Crowbar
______________ means that organisms best suited to their environments are most likely to survive and reproduce.
A. Adaptation
B. Mutation
C. Natural Selection
D. Evolution
E. Convergence
C. Natural Selection
The force that you exert is called ____________.
Effort
Is a wheel an axle a simple machine?
True or False?
True
Which of these is more elastic?
A. SuperballB. Baseball
A. Superball
When gears turn, the gears rub on each other. This adds extra resistance, which is due to which force?
A. Friction
B. Gravity
C. Magnetism
D. Motion
E. Advantage
A. Friction
The gradual change in a species over time is called ____________.
A. Adaptation
B. Mutation
C. Natural Selection
D. Evolution
E. Convergence
Evolution