Unit 24 - The Solar System

A day is the time taken for the _________________

• Earth to spin on its axis

• Moon to orbit the Earth

• Earth to orbit the Sun

• Moon to spin on its axis

A month is the time taken for the _________________

• Earth to spin on its axis

• Moon to orbit the Earth

• Earth to orbit the Sun

• Moon to spin on its axis

A year is the time taken for the _________________

• Earth to spin on its axis

• Moon to orbit the Earth

• Earth to orbit the Sun

• Moon to spin on its axis

The Earth is tilted on its axis and this causes _______ which do not occur at the Equator.

Which phase of the Moon is this?

• waxing crescent

• waxing gibbous

• waning gibbous

• waning crescent

How many days are there from one full Moon to the next?

• 27.5 days

• 31 days

• 30 days

• 28 days

What shape are planetary orbits?

• circular

• elliptical

• irregular

• triangular

What force causing planets to orbit the Sun?

Sun is not at the center of the planets' orbit. When a planet is at the closest point with the Sun, what happen to its energy?

• potential energy : maximum

  kinetic energy : maximum

• potential energy : maximum

  kinetic energy : minimum

• potential energy : minimum

  kinetic energy : minimum

• potential energy : minimum

  kinetic energy : maximum

Sun is not at the center of the planets' orbit. When a planet is at the closest point with the Sun, what happen to its speed?

• maximum

• minimum

• can't be predicted