Investigating Friction
Students will design simple experiments to measure and compare the amount of friction on various surfaces.
Key Questions
- Design an experiment to determine which surface provides the most grip.
- Analyze how changing the surface affects the distance an object travels.
- Justify the importance of friction in everyday activities like walking or cycling.
National Curriculum Attainment Targets
About This Topic
The study of magnetic poles and the Earth connects the small-scale classroom experiments with the large-scale reality of our planet. Year 3 students learn that every magnet has two poles and that the Earth itself acts like a giant bar magnet. This topic is essential for understanding navigation and the history of exploration, fulfilling the curriculum goal of describing magnets as having two poles.
Students explore why a suspended magnet always aligns itself in a North-South direction, leading to the discovery of the compass. This topic provides a brilliant opportunity to link science with geography and history. This topic comes alive when students can physically model the patterns of the Earth's magnetic field using their own handmade compasses.
Active Learning Ideas
Inquiry Circle: Making a Compass
Students magnetise a needle by stroking it with a magnet, then float it on a cork in water. They compare the direction their needle points with their classmates' needles to find 'North'.
Role Play: The Human Compass
One student acts as the 'Earth' with a giant magnet. Others act as 'Compasses' holding bar magnets, moving around the 'Earth' and showing how their magnet poles react to the Earth's position.
Think-Pair-Share: Lost at Sea
Students are given a scenario where they are lost in a forest or at sea. They must discuss in pairs how a magnet and a piece of string could help them find their way home.
Watch Out for These Misconceptions
Common MisconceptionIf you break a magnet in half, you get a separate North pole and South pole.
What to Teach Instead
Every piece of a magnet, no matter how small, always has both a North and a South pole. If you snap a magnet, you simply have two smaller magnets. Modelling this with 'magnetic tiles' or diagrams helps students grasp this concept.
Common MisconceptionMagnets point to the North Pole because it is cold there.
What to Teach Instead
The North Pole of a magnet is attracted to the Earth's magnetic North, which is a result of the Earth's iron core, not the weather. Using a globe and a bar magnet helps students visualise the internal 'giant magnet' of the Earth.
Suggested Methodologies
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Frequently Asked Questions
Why does a magnet always have two poles?
How do magnets help with navigation?
What is the difference between a pole and a magnet?
How can active learning help students understand magnetic poles?
Planning templates for Science
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerThematic Unit
Organize a multi-week unit around a central theme or essential question that cuts across topics, texts, and disciplines, helping students see connections and build deeper understanding.
rubricSingle-Point Rubric
Build a single-point rubric that defines only the "meets standard" level, leaving space for teachers to document what exceeded and what fell short. Simple to create, easy for students to understand.
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