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1. 
Most simple machines use energy from
A.
electricity
B.
fuel
C.
people
2. 
Simple machines transmit
A.
movement and energy
B.
movement and force
C.
force and energy
3. 
An inclined plane is a
A.
ramp
B.
lever
C.
pulley
4. 
A wheel helps us to
A.
lift or lower heavy objects
B.
move more quickly
C.
move around a fixed point
5. 
This image is an example of
A.
pulley
B.
lever
C.
axle
6. 
Most complex machines use
A.
energy from people
B.
energy from electricity or fuel
C.
energy from the Sun
7. 
The most important operating parts of a complex machine are
A.
axle, shaft, and blades
B.
motor, shaft, and ramp
C.
shaft, motor and gears
8. 
Bicycles are complex machines. This operating part is called
A.
wheels
B.
gears
C.
lever
9. 
A car is a complex machine. This operating part is called
A.
motor
B.
shaft
C.
gears
10. 
This invention is important for navegation
A.
wheel
B.
compass
C.
steam engine
11. 
The first inventions were made
A.
10 years ago
B.
hundreds of years ago
C.
thousands of years ago
12. 
Which type of scientific advance is this image?
A.
medicine
B.
transport
C.
domestic
D.
communication
13. 
What type of scientific advance is this image?
A.
medicine
B.
transport
C.
domestic
D.
communication
14. 
What type of scientific advance is this image?
A.
medicine
B.
transport
C.
domestic
D.
communication
15. 
What type of scientific advance is this image?
A.
medicine
B.
transport
C.
domestic
D.
communication
16. 
What type of scientific advance is this image?
A.
medicine
B.
transport
C.
domestic
D.
communication
17. 
What type of scientific advance is this image?
A.
medicine
B.
transport
C.
domestic
D.
communication
18. 
What type of scientific advance is this image?
A.
medicine
B.
transport
C.
domestic
D.
communication
19. 
What type of scientific advance is this image?
A.
medicine
B.
transport
C.
domestic
D.
communication