Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
The Solar System consists of the Sun and everything that orbits around it, including major planets, their moons, dwarf planets, and asteroids.
The Sun is a star at the center of the Solar System. It provides energy in the form of light and heat. Its surface temperature is approximately .
The four inner planets (Mercury, Venus, Earth, and Mars) are called terrestrial planets because they are made mostly of rock and metal.
The four outer planets (Jupiter, Saturn, Uranus, and Neptune) are known as Gas Giants or Ice Giants. They are much larger than the terrestrial planets.
Rotation is the spinning of a planet on its axis. For Earth, rotation hours, which creates day and night.
Revolution is the movement of a planet around the Sun. Earth's revolution takes approximately days, which we define as year.
The Moon is Earth's only natural satellite. It does not produce its own light but reflects light from the Sun.
📐Formulae
💡Examples
Problem 1:
If Earth takes hours to complete one full rotation, how many hours does it take to complete rotations?
Solution:
hours
Explanation:
Since one rotation equals one day ( hours), we multiply the number of days by the hours in a single day.
Problem 2:
Venus is the hottest planet with an average surface temperature of about , while Earth's average is about . What is the difference in temperature?
Solution:
Explanation:
To find the difference, we subtract the lower temperature from the higher temperature using the Celsius scale.
Problem 3:
A leap year occurs every years to account for the extra days in Earth's revolution. Calculate the total extra time added over years.
Solution:
full day
Explanation:
Because Earth takes days to orbit the Sun, adding the (or ) of a day over four years equals full day (February 29th).