Push and Pull
What do you call a force that moves an object away from you?
Push
What happens to two objects when they touch each other suddenly at speed?
Collide
What is the name for a push or a pull?
Force
What makes a sound?
Vibration
True or False: Vibrations are big movements that you can always see.
False
Give one example of a push and one example of a pull from everyday life.
Push: Pushing a cart, Pushing a stroller, Pushing a button etc...
Pull: Pulling a tissue, Pulling a wagon, Pulling a rope etc...
When a soft ball hits a hard wall, does the ball or the wall change shape more?
Ball
List two ways you can change how an object moves by using a force.
Push, pull, gravity, magnetism
Name two ways vibrations can be caused to make sound.
Plucking, hitting, blowing
Use your hands to make a simple experiment: tap two hands together softly and then loudly. Describe how the strength of the tap changes the vibration and the sound.
louder clap = stronger vibration and louder sound;
If you push a toy car harder, what happens to its motion: does it go faster, slower, or the same? Explain briefly.
goes faster
If two balls collide and one stops while the other keeps moving, what happened to the motion of the stopped ball?
motion transferred from stopped ball to other;
A book on a table does not move. Name the force that keeps it from falling through the table.
Normal
How can you tell if something is vibrating without looking—what could you do or listen for?
listen for sound or feel vibration;
Draw (or describe) an investigation to show that stronger vibrations make louder sounds. List one thing you would keep the same and one thing you would change.
change tap strength, keep objects same
Describe how you would set up a simple test to show that a stronger push makes a toy move farther than a weaker push. (Name one step and one thing you would keep the same.)
step: push car with the same object; keep surface the same;
Give an example of a collision where objects change shape and explain how the shapes change.
Collisions: Cars crashing, Ball hitting the wall, etc...
Change shape when they collide.
Explain how friction (rubbing between surfaces) can change an object’s motion. Give one example.
It makes it stop.
Shoes, Rollerblading, Cars.
Give an example of making a sound by vibration using an everyday object and describe the vibration.
tapping glass causes it to vibrate and make sound; 500 tighter string vibrates faster → higher pitch.
Vibrations
Explain how air helps us hear vibrations as sound
vibrating objects make air move in waves that our ears detect;
Two identical toy cars are on a flat floor. Car A is pushed gently and travels 10 cm. Car B is pushed strongly and travels 40 cm. Explain why Car B traveled farther using the words "push" and "strength."
stronger push = more motion so travels farther.
You roll a clay ball toward a toy block. The clay sticks to the block and flattens. Explain how this shows that collisions can change an object’s shape.
clay flattens showing shape change on collision.
Describe a simple investigation to measure how different surfaces (carpet vs. tile) change how far a toy car moves when given the same push. Include what you would change and what you would keep the same.
test: same push, measure distance, surfaces changed.
Explain why a guitar string makes a higher sound when it is tighter
tighter string vibrates faster → higher pitch.
Describe an experiment using a ruler hanging off a desk to show vibration. Explain how changing how far the ruler hangs off the desk changes its movement and the sound it makes.
ruler hanging farther vibrates more/longer and may make a lower sound.