Young Explorers: Investigating Our World · 2nd Year

Active learning ideas

Gravity: The Invisible Pull

Active learning turns the abstract idea of gravity into something students can see and feel. By testing predictions with their own hands, students build durable knowledge and correct misconceptions in real time.

• NCCA Curriculum Specifications
• NCCA: Primary - Energy and Forces
• NCCA: Primary - Forces

• 25–40 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Simulation Game
• 30 min · Small Groups

Drop Test: Feather vs Rock

Students drop a feather and rock from the same height, time the falls with stopwatches, and record differences. Add paper parachutes to the rock for a second trial, then discuss air resistance. Groups share results on a class chart.

Explain why objects fall to the ground when dropped.

Facilitation Tip

During Drop Test: Feather vs Rock, have students predict the outcome aloud before dropping, then time each fall with stopwatches to collect measurable evidence.

What to look for

Provide students with a small card. Ask them to draw one object falling and label the force pulling it down. Then, ask them to write one sentence predicting what would happen if gravity suddenly disappeared.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 02

• Simulation Game
• 35 min · Pairs

Ramp Challenge: Gravity Pull

Build ramps with books at varying angles. Roll marbles or balls down each, measure distance or time to bottom. Predict outcomes for steeper ramps and test predictions. Chart findings to spot patterns.

Predict what would happen if there was no gravity on Earth.

Facilitation Tip

During Ramp Challenge: Gravity Pull, encourage teams to vary ramp angles and record how far balls roll, linking steepness to gravitational pull strength.

What to look for

Hold up a crumpled piece of paper and a flat piece of paper. Ask students to predict which will fall faster and why. Then, drop them simultaneously and ask students to explain their observations using the terms 'gravity' and 'air resistance'.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 03

• Simulation Game
• 25 min · Whole Class

No Gravity Predictions: Whole Class Brainstorm

Show space videos of floating astronauts. Students draw or describe a gravity-free Earth playground. Share in circle time, vote on best ideas, and test simple versions like balloon jumps.

Compare the effect of gravity on a feather and a rock.

Facilitation Tip

During No Gravity Predictions: Whole Class Brainstorm, jot student ideas on the board and return to them after the Playground Gravity Hunt to deepen reflection.

What to look for

Pose the question: 'Imagine you are on the moon, where gravity is weaker than on Earth. How would jumping feel different? What would happen to objects you drop?' Facilitate a class discussion where students share their predictions and reasoning.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 04

• Simulation Game
• 40 min · Pairs

Playground Gravity Hunt: Observation Walk

Walk outdoors to spot gravity in action, such as swings, slides, falling leaves. Pairs sketch examples and explain the pull. Return to class for a shared wall display.

Explain why objects fall to the ground when dropped.

Facilitation Tip

During Playground Gravity Hunt, bring clipboards so students can sketch where gravity seems strongest and where objects appear to slow down.

What to look for

Provide students with a small card. Ask them to draw one object falling and label the force pulling it down. Then, ask them to write one sentence predicting what would happen if gravity suddenly disappeared.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

A few notes on teaching this unit

Teach gravity as a force students experience daily rather than a concept to memorize. Use hands-on trials to surface misconceptions, then guide students to revise their own explanations with evidence. Avoid abstract equations early; focus on observable patterns and language like 'pull,' 'accelerate,' and 'air resistance.' Research shows concrete experiences before abstraction build lasting understanding.

Students will confidently explain gravity as a force that pulls objects toward Earth’s center and use observations to challenge weight-based explanations. They will compare objects in free fall and communicate how air resistance affects motion.

---

Watch Out for These Misconceptions

• During Drop Test: Feather vs Rock, watch for students who claim heavier objects fall faster because they are heavier.

  Guide students to drop feather and rock simultaneously and time each fall; then ask them to compare results and discuss air resistance on the feather, using the recorded times to revise their claim.

• During Ramp Challenge: Gravity Pull, watch for students who say steeper ramps make objects heavier.

  Have students measure how far the ball rolls on different angles, then ask them to explain why the ball accelerates more on steeper ramps using the term 'gravitational pull' instead of weight.

• During Playground Gravity Hunt, watch for students who insist gravity only works on Earth.

  After observing playground equipment, show a short video of astronauts on the Moon and ask students to sketch how jumping or dropping objects would differ due to weaker gravity.

---

Methods used in this brief

• Simulation Game