Introduction to Forces

Active learning helps students grasp invisible forces like gravity and resistance by letting them see and feel the effects firsthand. When students test ideas with hands-on tasks, they move beyond abstract explanations to concrete understanding.

• Year 5
• Science
• 3 activities
• 25 min–60 min

Learning Objectives

1. Define the term 'force' and explain its effect on an object's motion, including starting, stopping, or changing direction.
2. Identify at least three different types of forces (e.g., gravity, friction, air resistance, push, pull) acting on everyday objects.
3. Predict the outcome of applying a specific force to an object, such as a ball rolling down a ramp or a book sliding across a desk.
4. Compare the effects of different forces, such as friction versus no friction, on an object's movement.

Inquiry Circle

⏱ 60 min·Small Groups

Inquiry Circle: The Parachute Challenge

In small groups, students design and build parachutes using different materials and surface areas. They drop them from a height and time the fall, discussing how the air resistance (upward force) opposes gravity (downward force) to slow the descent.

Prepare & details

Explain what a force is and how it can change an object's motion.

Facilitation Tip: During The Parachute Challenge, circulate and ask each group to predict how changing the parachute size will affect fall time before they test their ideas.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Simulation Game

⏱ 45 min·Small Groups

Simulation Game: Streamlining in Water

Students shape pieces of modeling clay into different forms (e.g., a ball, a flat disc, a teardrop) and time how long they take to sink to the bottom of a tall water container. They use their findings to explain how shape affects water resistance and why fish and boats are streamlined.

Prepare & details

Identify different types of forces acting on everyday objects.

Facilitation Tip: For Streamlining in Water, provide a timer for each trial so students practice measuring and recording results precisely.

Setup: Flexible space for group stations

Materials: Role cards with goals/resources, Game currency or tokens, Round tracker

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

Think-Pair-Share

⏱ 25 min·Pairs

Think-Pair-Share: Gravity on the Moon

Students watch a video of astronauts jumping on the Moon. They think about why the jumps are so much higher than on Earth, pair up to discuss the relationship between a planet's mass and its gravitational pull, and then share their conclusions with the class.

Prepare & details

Predict how applying a force will affect an object's movement.

Facilitation Tip: In Think-Pair-Share: Gravity on the Moon, circulate and listen for pairs using evidence from their prior investigations to explain why the Moon has gravity.

Setup: Standard classroom seating; students turn to a neighbor

Materials: Discussion prompt (projected or printed), Optional: recording sheet for pairs

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Teaching This Topic

Teachers often find that students learn best when they start with simple, visible examples before moving to abstract concepts. Avoid rushing to formal definitions; instead, let students describe what they observe and build the vocabulary together. Research suggests that guided inquiry—where students predict, observe, and explain—leads to deeper understanding than direct instruction alone.

What to Expect

Successful learning looks like students accurately explaining how gravity pulls objects toward Earth and describing how air or water resistance opposes motion. They should use correct vocabulary (e.g., friction, streamlining) to explain observed outcomes in their own words.

Watch Out for These Misconceptions

Common Misconception

During The Parachute Challenge, watch for students who believe heavier objects always fall faster. Redirect them by asking, 'What happens when you drop the light ball and the heavy ball at the same time? Use your observations to explain why.'

What to Teach Instead

During Think-Pair-Share: Gravity on the Moon, have students discuss why astronauts can jump higher on the Moon if gravity is weaker there. Guide them to realize gravity is still acting, but the Moon’s gravity is less than Earth’s.

Assessment Ideas

Exit Ticket

After The Parachute Challenge, ask students to write one sentence explaining how air resistance affected their parachute’s fall time and one sentence describing how gravity pulled their parachute down.

Quick Check

During Streamlining in Water, pause after the first trial and ask, 'What force slowed down the shape as it moved through the water? How could you reduce that force next time?'

Discussion Prompt

After Think-Pair-Share: Gravity on the Moon, ask, 'If you dropped a hammer and a feather on the Moon at the same time, what would happen? Explain using the forces we’ve discussed today.'

Extensions & Scaffolding

• Challenge: Ask students to design a second parachute with a different shape (e.g., triangular) and compare its performance to their first design.
• Scaffolding: Provide a table with columns for predictions, observations, and explanations for students who need support recording their findings.
• Deeper exploration: Have students research how real-world parachutes (e.g., for cargo or people) are designed to maximize air resistance safely.

Key Vocabulary

Force	A push or a pull that can cause an object to move, stop moving, or change direction.
Gravity	A force that pulls objects towards each other, especially towards the center of the Earth, causing things to fall.
Friction	A force that opposes motion when two surfaces rub against each other, slowing things down.
Air Resistance	A type of friction that occurs when an object moves through the air, slowing it down.
Push	A force that moves something away from you.
Pull	A force that moves something towards you.