Objective
By the end of this lesson, you will be able to solve arithmetic problems related to the plant Pluto.
Materials and Prep
- Pencil
- Blank paper
No prior knowledge is required for this lesson.
Activities
- Activity 1: Counting Pluto's Moons
- Activity 2: Pluto's Orbit
Draw a picture of Pluto and its moons on a blank paper. Count the number of moons and write the number down. Then, write a simple addition or subtraction problem using the number of moons as one of the operands. Solve the problem.
Imagine that Pluto takes 248 Earth years to complete one orbit around the Sun. Write down the number of Earth years it takes for Pluto to complete half an orbit. Then, write a multiplication or division problem using the number of Earth years as one of the operands. Solve the problem.
Second Grade Talking Points
- Pluto is a dwarf planet that used to be considered the ninth planet in our solar system.
- It is very far away from the Sun, which makes it very cold.
- Pluto has five known moons: Charon, Styx, Nix, Kerberos, and Hydra.
- Count the number of moons and write down the number.
- Use the number of moons to create an addition or subtraction problem.
- For example, if Pluto has 5 moons and loses 2 of them, how many moons will it have left?
- Pluto takes a long time to orbit around the Sun.
- It takes 248 Earth years for Pluto to complete one orbit.
- Write down the number of Earth years it takes for Pluto to complete half an orbit.
- Use the number of Earth years to create a multiplication or division problem.
- For example, if it takes 248 Earth years for Pluto to complete one orbit, how many Earth years does it take for half an orbit?