Magnetic Power Slides
Grade 3-5 Physical Science
Interactive Science Deck
Forces & Motion
Magnet Power!
Unlocking the secrets of magnetic materials, poles, attraction, and force fields.
NORTH N
S SOUTH
Ready to explore the invisible push and pull?
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Discovery Concept
What is Magnetism?
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Invisible Force
A Non-Contact Force
Magnets push or pull objects without touching them! This unseen push or pull is called magnetic force.
Magnetism passes right through air, water, and paper!
The Big 3 Metals
The Magnetic Trio
Natural magnetism only attracts three core metals:
Fe Iron
Ni Nickel
Co Cobalt
Steel attracts too because it is made mostly of iron!
💡 Scientist Question: Is every shiny metal object magnetic? Let's find out on the next slide!
Material Classification
Magnetic vs. Non-Magnetic
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Magnetic Objects
Attracted!
Objects made with Iron, Steel, Nickel, or Cobalt:
📎 Steel Paperclips & Staples
🔩 Iron Nails, Screws & Bolts
✂️ Steel Scissors & Metal Rulers
🥫 Steel Food Cans (Tin Cans)
Non-Magnetic Objects
No Attraction!
Objects without magnetic metals (even some metals!):
🥤 Aluminum Foil & Soda Cans
🪙 Copper Pennies & Brass Keys
✏️ Wood Pencils & Cardboard
🧽 Plastic Bottles, Glass & Rubber
Science Myth: "All metals stick to magnets." → FALSE! Copper, aluminum, brass, and gold never stick!
Magnet Anatomy
Every Magnet Has Two Poles
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Standard Bar Magnet
N North Pole
Strongest
S South Pole
Strongest
Poles at the ends
Center = Weakest Force
North Pole (N)
Points toward Earth's magnetic North.
South Pole (S)
Points toward Earth's magnetic South.
Break it in half?
You get two new magnets, each with its own North and South!
Key takeaway: You cannot have a single isolated pole! North & South always pair up.
The Golden Rule
Attract vs. Repel
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Rule 1: Opposite Poles PULL TOGETHER
Opposites ATTRACT
When North and South face each other, they pull strongly together!
N
S
N
S
South (S) + North (N) Snap Together!
Rule 2: Similar Poles PUSH AWAY
Like Poles REPEL
When North + North or South + South meet, they push apart!
S
N
N
S
North (N) + North (N) Push Apart!
Memory Rhyme: "Opposites attract, likes push back!"
Feel the invisible push!
Force Field Physics
The Magnetic Field
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What is a Magnetic Field?
The area of magnetic force around a magnet. Any magnetic object inside this zone feels a force!
Field Loops: Flow outward from North into South.
Strength: Strongest force at the two poles.
Distance: Force weakens as you move farther away.
Magnetic Field Line Pattern
→ N to S Flow →
N (Out)
S (In)
✨ Iron Filings: Tiny iron bits naturally trace these invisible curved field loops!
Field strength rule: Closer to the poles = Stronger magnetic pull! Invisible lines, real power!
Planetary Science
Earth is a Giant Magnet!
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The Molten Iron Core
Deep inside Earth, churning liquid iron and nickel generate a giant protective shield called the magnetosphere.
Cosmic Shield: Blocks harmful solar radiation!
Auroras: Creates Northern & Southern Lights!
🌍 Earth's magnetic field extends thousands of miles into space!
Navigation Tool
How Compasses Work
A compass needle is a tiny spinning magnet.
N S E W
The needle aligns with Earth's magnetic field!
Fun Fact: Birds, sea turtles, and whales use Earth's field to migrate! Nature's GPS
Everyday Technology
Magnets in the Real World
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Maglev Trains
Magnetic repulsion lets trains float at 300+ mph without track friction!
⚡ Zero Friction
Speakers & Motors
Magnets spin fan blades and vibrate speaker cones to produce clear sound!
🔊 Sound & Spin
Hospital MRI
Giant magnets safely scan inside the human body without using X-rays!
🏥 Body Scans
Electromagnets
Turn ON and OFF with electricity to lift heavy cars and scrap metal!
🏗️ Switchable
Magnets power laptops, phones, refrigerators, credit cards & wind turbines! Everyday Tech
Check for Understanding
Magnet Quiz Challenge!
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Question 1
Which metal will a magnet ATTRACT?
A) Aluminum soda can
B) Iron & steel nail
C) Copper penny
Answer: B (Iron & steel!)
Question 2
What happens when two North poles meet?
A) Attract together
B) Repel apart
C) Nothing happens
Answer: B (They repel!)
Question 3
Where is magnetic force the STRONGEST?
A) In the center
B) Around the sides
C) At the two poles
Answer: C (At the poles!)
Great job, Magnet Detectives!
Ready for hands-on magnet testing!