A strong push sends things flying — a gentle push barely moves them!
📋 NGSS Standard: K-PS2-1 — Plan and conduct an investigation to compare the effects of different strengths or different directions of pushes and pulls on the motion of an object.
🎯 Learning Objective
Students will investigate strong Push, Gentle Push, make observations during the lesson activity, and explain what they learned using evidence from the lesson.
🎯 The Big Idea
A push is a force that moves things away from you. But not all pushes are the same. A gentle push moves an object a little bit. A strong push moves it a lot. Today, we're going to test this with our own hands.
🤏
Gentle Push
A little bit of force Object moves a short distance
💪
Strong Push
A lot of force Object moves a long distance
🔬 The Science
Force is the strength of a push or pull. The harder you push something, the more force you use, and the farther it goes. A gentle push uses just a little force, so the object doesn't move very far. A strong push uses a lot of force, so the object moves much farther. When scientists study forces, they measure how much force is used and how far things move. You'll do this today by testing different push strengths!
💡 Key vocabulary: push, force, gentle, strong, distance, far, near
📦 Materials
🧪 Test Objects
⚽Ball
🚗Toy Car
🧊Block / Box
🧰 Other Supplies
Painter's tape or masking tape (for marking start line & distances)
A long hallway, smooth floor, or tabletop
Pencils, crayons, or markers
Printed Student Worksheet (last pages)
Optional: ruler, yardstick, or measuring tape
Optional: a stuffed animal or pompom (extra test object!)
💡 Setup tip: A smooth, hard floor works best (wood, tile, laminate). Carpet adds too much friction and makes differences harder to see. A long hallway is ideal!
🔬 Let's Get Started
Setup (5 minutes):
Put a strip of tape on the floor — this is the start line. 🏁 Clear a long path in front of the start line (at least six to eight feet). Gather all test objects and place them near the start line. Give each child a Student Worksheet, crayons, and a pencil.
Step 1 — Warm-Up Talk (5 min):
Ask: "What is a push? Can you show me a push?" Let both kids demonstrate pushing the air, pushing their hands together, gently pushing a toy. Then ask: "What happens if you push something really hard vs. really softly?" Let them guess.
Step 2 — Demonstrate (3 min):
Place the ball at the start line. Give it a gentle push. Mark where it stops with a small piece of tape. Now put it back and give it a strong push. Mark where THAT stops. Ask: "Whoa! What happened? Why did it go farther the second time?"
Step 3 — Experiment Time! (15–20 min):
Kids take turns. One pushes, the other watches and marks where the object stops. Then switch!
For EACH object (ball, car, block):
Place it at the start line
Give a gentle push → mark where it stops with tape
Place it back at the start line
Give a strong push → mark where it stops with tape
After each test, look at the two tape marks. Which one is farther from the start? 🤔
Record results on the Student Worksheet (draw or write!)
💡 Sibling teamwork: One child is the "Pusher" and the other is the "Marker" (places tape where the object stops). Swap roles for each object!
Step 4 — Compare & Discuss (5–10 min):
Look at all the tape marks on the floor together. Ask the discussion questions below. Have kids share what they noticed.
Step 5 — Wrap-Up (5 min):
Say together: "A strong push makes things go far. A gentle push makes things go a little." High five — gently and strongly! 🖐️
💬 Discussion Questions
🟢 1. What happened when you pushed the ball gently? What about when you pushed it hard?
🟢 2. Which push made the car go farther — the gentle push or the strong push?
🟢 3. Did all three objects move the same distance with a strong push? Why or why not?
🟢 4. What would happen if you pushed something with no force at all? (Zero push!)
🟢 5. Can you think of a time in real life when you use a gentle push? A strong push? (Examples: closing a door gently vs. slamming it, rolling a bowling ball, pushing a friend on a swing)
🟢 6. Which object was hardest to push? Why do you think so?
🚀 Extensions
📐 Measure It: Use a ruler or measuring tape to measure actual distances. Write the numbers! Great early math connection.
🧸 More Objects: Try pushing a stuffed animal, a pompom, a book, a sock — do heavier/lighter things behave differently?
🔄 Try Pulls! Tie a string to a toy car. Pull gently, then pull hard. Same pattern?
⬆️ Ramps: Set up a ramp with a cutting board or book. Push a car gently from the top vs. strongly. What changes?
🎳 Bowling Game: Set up plastic cups as "pins." Roll the ball gently — how many fall? Roll it hard — how many now?
👩🏫 Parent/Teacher Notes
Mess level: Low. This is a clean experiment. Just need floor space.
Floor surface matters: Hard, smooth floors show the biggest difference between gentle and strong pushes. On carpet, objects stop quickly regardless of force.
Let them be silly: Kindergartners will want to push things really hard. That's great — it proves the point. Just set boundaries (no pushing toward walls, pets, or breakable things).
Language to reinforce: Use "force," "push," "gentle," "strong," "far," and "distance" often. These are the science words we want them to absorb.
Don't worry about precision: The goal is the qualitative observation — strong push = farther. Exact measurements aren't needed (but are a great extension for kids who are ready).
Sibling dynamics: Having them take turns as "Pusher" and "Marker" keeps both engaged and avoids fights over who pushes first.
Push the ball gently. Then push it hard. Draw what happened!
🤏 Gentle Push
Draw how far the ball went
💪 Strong Push
Draw how far the ball went
Which push made the ball go farther? Gentle / Strong (circle one)
🚗 Test 2: Toy Car
Push the car gently. Then push it hard. Draw what happened!
🤏 Gentle Push
Draw how far the car went
💪 Strong Push
Draw how far the car went
Which push made the car go farther? Gentle / Strong (circle one)
🧊 Test 3: Block / Box
Push the block gently. Then push it hard. Draw what happened!
🤏 Gentle Push
Draw how far the block went
💪 Strong Push
Draw how far the block went
Which push made the block go farther? Gentle / Strong (circle one)
🤔 Big Question!
What did you learn? Finish this sentence:
When I push something hard, it goes ________________________________.
When I push something gently, it goes ________________________________.
🎨 Draw your favorite part of the experiment!
Draw here!
✂️ PARENT ANSWER KEY — Detach before giving worksheet to students
Expected Observations
⚽ Ball: A gentle push should move the ball a short distance (a few inches to a foot). A strong push should send it rolling several feet. Kids should circle "Strong" as going farther.
🚗 Toy Car: Same pattern — gentle push moves it a short distance, strong push sends it much farther. Wheels make the difference especially dramatic on smooth floors. Circle "Strong."
🧊 Block / Box: A block without wheels requires more force to get moving. A gentle push may barely move it (especially on carpet). A strong push will slide it further but likely not as far as the ball or car. Circle "Strong."
🤔 Big Question — Expected answers:
"When I push something hard, it goes far / a long way / really far."
"When I push something gently, it goes a little / not very far / a short way." Accept any phrasing that shows they understand stronger push = more distance.
Discussion Question Guidance
Q1–Q2: Kids should describe that hard pushes = went farther, gentle = stayed close. Encourage them to use the word "force."
Q3 (Different objects): Heavier/bulkier objects (block) don't go as far as lighter ones (ball) with the same push. This points ahead to mass concepts — you do not need to teach "mass" formally, but you can say "heavier things are harder to push far."
Q4 (Zero push): Nothing happens! Objects stay still unless a force acts on them. (This points ahead to Newton's First Law — no need to name it.)
Q5 (Real life): Great answers include: closing a door softly vs. slamming, rolling a bowling ball, pushing a shopping cart, pushing a sibling on a swing (gentle = small swing, hard = big swing).
Q6 (Hardest to push): The block/box is likely hardest because it has no wheels and more friction with the floor. The ball or car is easiest.
What Success Looks Like
By the end, both kids should be able to say (in their own words): "If you push harder, things go farther." That's the core K-PS2-1 concept. Everything else is bonus! 🎉
