Free fall means motion controlled mainly by gravity, not the absence of gravity.
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LIVE VISUAL LAB
MASS
Gravity bends forward motion into an orbit.
Interactive teaching model • relationships are controlled; scale, distance or timing may be simplified and are labeled here.
The big idea
Free fall means motion controlled mainly by gravity, not the absence of gravity.
A feather and hammer fall together in vacuum; in air, drag changes their motion differently.
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HOW SCIENTISTS KNOW
Vacuum experiments and Apollo's lunar demonstration separate gravity from air resistance.
WORDS TO OWN
free fallaccelerationair resistancevacuum
!A COMMON WRONG MODEL
Falling and Free Fall is only a name or picture to memorize.
✓REBUILD IT WITH EVIDENCE
Connect falling and free fall to the observable relationship, evidence and system described in the lesson.
A scientifically true sentence can still create a false picture. This repair makes the relationship visible.
Take learning into real life
Try it together
Make a motion test with a safe ball, a ramp made from a book and tape marks. Change only one variable, measure the result and name the force involved. Connect what you notice to falling and free fall using free fall and acceleration.
GREEN SAFETYOrdinary low-risk activity with normal caregiver awareness.
01TALKWhat do you predict before we try it?02LOOKWhat changed? What stayed the same?03EXPLAINWhich evidence supports your idea?
Check understanding
Which statement best explains falling and free fall?
Choose the explanation that matches the evidence—not just the most familiar words.
Three things to remember
✓Free fall means motion controlled mainly by gravity, not the absence of gravity.
✓A feather and hammer fall together in vacuum; in air, drag changes their motion differently.
✓Evidence matters: vacuum experiments and apollo's lunar demonstration separate gravity from air resistance.
SPACE FIRST CLASS My journey