1. Clock
Many clocks have gears inside. The gears turn the energy of the clock’s wind-up motor into movement, which controls the minute and hour hands.
A coo coo clock tells time by using gears. The gears turn the energy of the clock’s wind-up motor into movement, which controls the minute and hour hands.
Q1. What are clocks used for?
Please select one of the following answers.
(1) Making loud noises.
(2) Throwing at the wall.
(3) Telling time.
(4) Decoration
Q2. What type of simple machine is inside this clock?
Please select one of the following answers.
(1) Pulley
(2) Wheel and axle
(3) Gear
(4) Lever
(5) Inclined plane
(6) Screw
(7) Wedge
Q3. What does the coo coo clock help us do?
Please select one of the following answers.
(1) Tell time.
(2) Catch bird.
(3) Cook dinner.
(4) Fall asleep.