Day 26: What Causes Gravity?
College-Prep Physics: Even though we now have a mathematical relationship between mass and weight, we still don’t know what causes Earth’s gravitational pull. So first, we took a short survey:
Download a copy here: GRAVITY Survey 2015
Then we went through each of the four claims in survey question 4 and did a testing experiment for each claim.
CLAIM #1: Earth’s Magnetism
CLAIM #2: Earth ‘s Rotation
CLAIM #3: Air Pressure
CLAIM #4: Earth’s Mass
We also compared characteristics of different planets using a table of planetary data.
This sequence of claims and questioning is based off one found in Preconceptions in Mechanics. On Tuesday, we’ll discuss the relative strengths of the gravitational pulls that 2 masses exert on each other.
NGSS Science and Engineering Practice #6. Constructing Explanations