Question of the Day: ISEE Primary 4 Reading
A Look Into Space
Did you know that we used to think that there were nine planets that made up the solar system? Up until 2006, Pluto was considered to be the ninth planet and was located furthest away from the sun in our solar system. However, since 2006 Pluto has been considered to be a “dwarf planet” because it is too small to be considered a planet. Now that Pluto is not considered a planet, only eight planets are left to make up our solar system. The order of the planets from the sun is as follows: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
Mercury is the planet closest to the sun; however, can you believe that Mercury is not the planet with the hottest temperatures in our solar system? Well, believe it because Venus is the planet with the highest temperatures! The only award that sets Mercury apart from any other planet in the solar system is that it is the smallest planet.
Earth is the planet where you and I live. Earth is the only planet currently known to be the home of living things. However, Mars does show some signs that there may be water on the planet, which is necessary for living things to grow and live on Mars. Maybe one day we will learn that aliens really do live on Mars!
Jupiter is the largest planet is the solar system, but it has the shortest days out of all of the planets because it turns so quickly. A day on Earth is 24 hours long, but a day on Jupiter is less than 10 hours long and a day on Saturn is just over 10 hours long. If we lived on Jupiter or Saturn, then we would spend most of the day in school!
Uranus is not the furthest planet from the sun, but it is the coldest. Even though Uranus is the coldest planet, Neptune might have the worst weather. One storm on Neptune lasted for about 5 years! Could you imagine a storm lasting for 5 years on Earth?
One fun thing about science is that we are always learning something new because science can change. We could learn more unknown, fun facts about the solar system in the future!
According to the passage, what does a "dwarf planet" mean?
A small planet
A large planet