Shadow Length and Earth's Movement

The video tutorial explores how shadows can be used to tell time, similar to sundials. The instructor sets up an experiment using a metal rod to observe shadow changes throughout the day. As the Earth rotates, the shadows change in length and position, demonstrating the concept of Earth's rotation. The video concludes with an assignment to plot shadow measurements on a graph.

What is the historical tool used to tell time by observing shadows?

• Clock

• Sundial

• Compass

• Thermometer

What tool did the teacher use to set up the shadow experiment?

• A wooden stick

• A metal rod

• A plastic ruler

• A glass tube

How long was the shadow at 11:30 a.m.?

• 100 centimeters

• 82 centimeters

• 118.5 centimeters

• 84 centimeters

What does the change in shadow length indicate about the Earth?

• The Earth is shrinking

• The Earth is rotating

• The Earth is stationary

• The Earth is expanding

At 1:30 p.m., what was the length of the shadow?

• 84 centimeters

• 82 centimeters

• 118.5 centimeters

• 100 centimeters

What happens to the shadow length as the afternoon progresses?

• It gets longer

• It disappears

• It gets shorter

• It stays the same

What was the shadow length at 3:30 p.m.?

• 82 centimeters

• 84 centimeters

• 100 centimeters

• 118.5 centimeters

What is the final task given to the students?

• Write an essay

• Draw a picture

• Plot the measurements on a graph

• Build a sundial

What does the movement of the sun in the sky cause?

• Changes in temperature

• Changes in humidity

• Changes in shadow length

• Changes in wind direction

What is the significance of the shadow being the same length as the measuring stick?

• It demonstrates the sun's position in the sky

• It marks the end of the experiment

• It indicates noon

• It shows the Earth has stopped rotating