What is a force?
a. an object that sticks to iron or steel
b. information that is collected and recorded
c. a push or a pull
d. data used to support claims
Letter C.
a push or a pull
What force caused the twirly bird to fall to the ground?
Gravity
What is an engineer?
a scientist who designs ways to accomplish a goal or solve a problem
What is a prediction?
A prediction is an educated guess about what will happen.
What is a magnet?
What is it called when two magnets push away from each other?
What force causes things to slow down until they come to a stop?
Friction
What is a variable?
Something you change in an experiment that might affect the outcome.
What does observe mean?
When you watch something very carefully to notice things about it.
What is a shaft?
a long, thin structure that can be used as an axis or axle
There is no movement.
What did our tops rotate on?
An axis (the shaft)
What is a constraint?
a limitation or rule that you need to follow when you do an experiment
What is a top?
A toy that spins
How many centimeters long is the car?
6 cm.
Letter B.
Balanced, the magnets are stable (not moving).
Which system would roll down a ramp in a straight line?
System A, because both wheels are the same size.
What is a standard unit? (think meters!)
A unit that never changes. Such as meters or centimeters.
What is gravity?
a force that pulls objects towards the center of the Earth
What is it called when two magnets move towards each other?
Attraction
Letter D.
Student B is applying 500 units of force.
What kind of wheel and axle system would roll in a path like this? Hint: think about the wheels
A wheel and axle system with one big wheel and one small wheel.
What is a standard model?
A model created to compare the effect of changing a variable in an experiment
What is criteria?
the rules for evaluating or testing something
What is a bearing?
a part of a machine that supports or guides a rotating point