U1 Planet Earth and its representation

The Earth rotates on its axis in a clockwise direction.

• around the moon in a clockwise direction

• around the moon in an anticlockwise direction

• on its axis in an anticlockwise direction

• on its axis in a clockwise direction

It takes 24 hours to complete one ___________ This movement causes day and night.

• rotation

• revolution

• lap around the moon

During rotation movement It’s daytime in the half of the planet and night-time in the other half.

• TRUE

• FALSE

• It depends on the season

• It depends on the month

It takes the Earth _______to complete one revolution around the Sun.

• 365 days, twenty-six hours and nine minutes

• 365 days, six hours and nine minutes

• 24 hours, twenty-six minutes and nine seconds

• None of the previous is correct

Revolution causes ____

• Day and night

• the seasons

• the weather

• None of the previous is correct

Because the Earth’s axis is straight and the Earth’s orbit is elliptical, some parts of the Earth receive __________than others at different times of the year.

• more harmful ultraviolet rays.

• more rain and wind

• more light and heat

• None of the previous is correct

The atmosphere and greenhouse gases are …

• Harmful

• Nonessential for Life

• Essential for Life

• None of the previous is correct

Meteoroids burn up here,…

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere

jet aircraft and weather balloons fly in this layer

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere

All the weather that we experience occurs at this level

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere