Force Pairs & Systems (Newton's Third Law Deep Dive)
Name: Period: Date:
REF STUDY GUIDE: Big Ideas Use to answer form questions
1.Newton's Third Law: Every force has an equal and opposite partner — when you push on a desk, the desk pushes back on you with exactly the same amount of force in the opposite direction.
2.Why Force Pairs Don't Cancel: Action-reaction forces act on two different objects, not the same one — your foot pushes the ground backward and the ground pushes you forward, so you accelerate even though the forces are equal in size.
3.Equal Forces, Different Accelerations: When two objects push on each other with equal force, the lighter object accelerates more because a = F/m — a skateboard rolls away faster than the person who pushed it.
4.Biological Force Pairs: Animals move by pushing against their environment — a fish pushes water backward with its tail and the water pushes the fish forward, which is Newton's Third Law in living systems.
DRAW KEY TERMS Google each → Images tab → sketch what you see
Newton's third law
For every action, there is an equal and opposite reaction
System
The objects we are analyzing in a situation
force pair
Two equal and opposite forces acting on different objects
action-reaction
Newton's Third Law: every force has an equal opposite partner
WRITE FOCUS QUESTION Your initial thinking
Every time you take a step, jump, or even just stand still, Earth's gravity pulls you downward. But Newton's Third Law says forces always come in pairs — so is there a force pulling back on Earth too?
If Earth pulls you with gravity, do you pull Earth?
I think...
WRITE AFTER HOOK FORM Reflect before continuing
I learned that...
Station 1 — Force Pair Identification
I observed that...
This shows that...
The key concept is...
CHECK DAY 1 CHECK-IN Before you leave
Q1: Based on today's investigation of force pairs & systems (newton's third law deep dive), explain one key finding using evidence from your data. Connect your answer to this week's focus question: If Earth pulls you with gravity, do you pull Earth?
Confidence:
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Force Pairs & Systems (Newton's Third Law Deep Dive) (Day 2)
Name: Period:
Station 2 — Biological Force Pairs ⭐ CRITICAL FOR C3
The data shows...
This connects to...
The main idea is...
This connects to what we learned because...
I can apply this by...
DRAW CONCEPT MODEL Show your understanding visually
Draw a model that shows the main concept. Include labels and arrows to explain relationships.
Labels included
Relationships shown
Key terms used
CHECK TEST YOUR THINKING Rate each: FALSE ← 1-2-3-4-5 → TRUE
1. When you push a wall, the wall does not push back on you.
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2. Action-reaction forces are equal and opposite, so they always cancel each other out.
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3. If two forces are equal and opposite, neither object can accelerate.
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4. The bigger or stronger object in a collision exerts more force than the smaller one.
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5. When a bug hits a car windshield, the car exerts a greater force on the bug than the bug exerts on the car.
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Pick any TWO statements — especially any you rated 2, 3, or 4. Justify your rating with evidence:
Statement #___ — I rated it ___ because:
Statement #___ — I rated it ___ because:
THINK SCIENTIST CIRCLE DEBRIEF Reflect after your Scientist Circle discussion
AHA! Moment
The one I changed my thinking most about is...
Remaining Question
I still wonder...
WRITE FOCUS QUESTION REVISIT Final written response
If Earth pulls you with gravity, do you pull Earth?
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