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This lesson presents timekeeping devices and the types and units of time measurement.
Is a matchbox able to imitate the croak of frogs? With the following experiment we reveal the...
In this experiment, we convert a plastic bottle into a rocket.
Find out whether the marble reaches the finish line faster on the straight or on the curved slope.
Objects denser than water sink in water.
How can this pendulum accurately measure time in seconds?
Let's make musical instruments.
In this lesson you will learn more about how sound propagates.
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