Earth's Rotation and Time Concepts

The video explains the cause of day and night on Earth, focusing on the Earth's rotation on its tilted axis. It describes how the counterclockwise rotation results in the sun appearing to rise in the east and set in the west. An experiment using a lamp and globe demonstrates how only half of the Earth faces the sun at any time, creating day and night. The video also highlights global time differences, such as between India and the USA, due to Earth's rotation.

What is a globe in relation to Earth?

• A map of Earth's surface

• A satellite orbiting Earth

• A miniature model of Earth

• A real-time image of Earth

What is the tilt angle of Earth's axis?

• 45 degrees

• 30 degrees

• 23.5 degrees

• 15 degrees

How long does it take for Earth to complete one rotation on its axis?

• 72 hours

• 12 hours

• 48 hours

• 24 hours

In which direction does Earth rotate?

• Horizontally

• Vertically

• Counterclockwise

• Clockwise

What does the counterclockwise rotation of Earth cause?

• The sun to rise in the east

• The sun to rise in the west

• The stars to move north

• The moon to rise in the east

In the experiment, what does the lamp represent?

• A planet

• The sun

• The moon

• A star

What happens to the part of the globe facing the lamp in the experiment?

• It becomes night

• It becomes day

• It remains unchanged

• It becomes cloudy

When it is day in the United States, what is it in India?

• Day

• Night

• Morning

• Evening

What causes the change from day to night on Earth?

• The moon's orbit around Earth

• Earth's rotation on its axis

• Earth's revolution around the sun

• The sun's movement across the sky

Which two countries are mentioned as being on opposite sides of the globe?

• China and Brazil

• Russia and South Africa

• Australia and Canada

• India and United States