Activity 01
Drop Test Challenge: Object Races
Provide feathers, balls, coins, and paper clips. Students drop pairs from the same height, time the falls with stopwatches, and record which lands first. Discuss air resistance as a secondary factor after confirming equal fall times in vacuum demos.
Explain why objects fall to the ground.
Facilitation TipDuring Drop Test Challenge, remind pairs to release objects at the exact same moment and height so air resistance differences stand out.
What to look forProvide students with a drawing of a ball being thrown. Ask them to draw an arrow showing the direction gravity pulls on the ball and write one sentence explaining why the ball does not fly straight up forever.
RememberApplyAnalyzeSelf-ManagementDecision-MakingSelf-Awareness
Generate Complete Lesson→· · ·
Activity 02
Parabola Pathways: Ball Throws
Mark a playground with chalk arcs showing predicted paths. Pairs throw soft balls at angles, trace landings with cones, and adjust throws to match predictions. Compare actual paths to straight-line expectations.
Analyze how gravity affects the flight of a thrown ball.
Facilitation TipIn Parabola Pathways, have students mark the ground with tape every metre so they can measure horizontal travel and connect it to gravity’s pull.
What to look forHold up two objects of different masses (e.g., a feather and a rock). Ask students to predict which will fall faster and why. Then, drop them simultaneously (if possible, or discuss a controlled scenario) and ask students to explain their observations in terms of gravity.
RememberApplyAnalyzeSelf-ManagementDecision-MakingSelf-Awareness
Generate Complete Lesson→· · ·
Activity 03
Ramp Roll-Off: Gravity Grades
Build adjustable ramps with books and rulers. Roll marbles down at different angles, measure distances, and graph speed versus incline. Predict outcomes for new angles based on patterns.
Predict what would happen if there was no gravity on Earth.
Facilitation TipFor Ramp Roll-Off, place a strip of paper under the ramp exit so the ball’s landing spot leaves a trace for comparison across trials.
What to look forPose the question: 'Imagine you are on the Moon, which has less gravity than Earth. What would be different about jumping or dropping an object there?' Facilitate a class discussion where students share their predictions and reasoning.
RememberApplyAnalyzeSelf-ManagementDecision-MakingSelf-Awareness
Generate Complete Lesson→· · ·
Activity 04
Zero-G Simulations: Balloon Lifts
Tie strings to balloons filled with helium. Students pull down to mimic gravity, then release to simulate low gravity, observing slower falls. Draw comparisons to Earth gravity.
Explain why objects fall to the ground.
Facilitation TipDuring Zero-G Simulations, let students hold the balloon string lightly so the lift feels gradual and they sense the upward force without sudden pulls.
What to look forProvide students with a drawing of a ball being thrown. Ask them to draw an arrow showing the direction gravity pulls on the ball and write one sentence explaining why the ball does not fly straight up forever.
RememberApplyAnalyzeSelf-ManagementDecision-MakingSelf-Awareness
Generate Complete Lesson→A few notes on teaching this unit
Start with everyday examples children already notice—dropped toys, falling leaves—to anchor new vocabulary. Avoid over-explaining; instead, let students test predictions and voice surprises. Research shows concrete trials build stronger mental models than lectures alone, especially for forces that cannot be seen.
Students will show they know gravity pulls toward Earth’s centre by correctly predicting, observing, and explaining downward motion in each challenge. They will also revise initial ideas when data contradicts predictions, demonstrating growing accuracy in their models.
Watch Out for These Misconceptions
During Drop Test Challenge, watch for students who predict heavier objects hit the ground first.
Have pairs drop equal-sized balls of different masses from the same height, count aloud to three, and record landing times. Ask the class to compare data and notice that gravity pulls both at the same rate.
During Ramp Roll-Off, watch for students who describe gravity as a push from the ramp.
Ask them to feel the ball at the ramp’s exit—gravity is not touching it there. Use the term ‘non-contact pull’ and contrast it with the ramp’s push during the roll.
During Zero-G Simulations, watch for students who think objects would drift away forever if gravity stopped.
After the balloon lift, ask them to draw what happens if the string breaks: the balloon floats straight up briefly then slows. Link this to Newton’s first law—moving objects keep moving in straight lines unless another force acts.
Methods used in this brief