Description
Explained what is a planet and why Pluto is not considered as a planet?
Activity_Date
Activity Grade
Grade III
Syllabus
Yes
Lesson Plan
Yes
Test
Yes
Planned Activity
Science
Activity Question
Write the three criteria for being a planet.
Activity Response
Answer:
The three main criteria for a celestial body to be classified as a planet (according to the International Astronomical Union, IAU, 2006) are:
- Orbits the Sun – The object must revolve around the Sun. (This excludes moons, which orbit planets instead of the Sun directly.)
- Sufficient Mass for a Nearly Round Shape – The object must have enough mass for its gravity to pull it into a nearly spherical shape. (This ensures it is not an irregularly shaped asteroid.)
- Cleared Its Orbital Path – The object must have cleared its orbit of other debris and smaller objects. (It should dominate its orbital zone.)
Because Pluto does not meet the third criterion, it is classified as a dwarf planet, not a full-fledged planet
Homework Assigned
Review class work.
MCQ Test URL
No Test