Science Lab and Scientific Method
What should you always do before starting an experiment?
Follow safety rules and listen to directions.
What is a force?
A push or a pull.
What is friction?
A force that happens when two surfaces rub against each other.
What is static electricity?
A buildup of electric charges on an object.
What is an engineer?
Someone who designs and builds solutions to problems.
What is the scientific method used for?
To investigate questions and solve problems.
What force pulls objects toward Earth?
Gravity.
Does friction make it easier or harder for objects to slide?
Harder.
What are the two types of electric charges?
Positive and negative.
What is the first step in solving an engineering design problem?
Identify or define the problem.
What does it mean to conduct a fair test
Only changing one variable while keeping other conditions the same.
What happens when an object has unbalanced forces acting on it?
Its motion changes.
What happens when you roll a ball across grass compared to a smooth floor?
The ball usually slows down faster on grass because of more friction.
What are the two ends of a magnet called?
The north pole and south pole.
What does it mean to test a design?
Try it out to see if it works.
What is an observation?
Information gathered using your senses or tools.
What are balanced forces?
Forces that are equal in strength and opposite in direction, resulting in no change in motion.
What is a pattern of motion?
A repeated or predictable way an object moves.
What happens when two magnets with the same poles are placed near each other?
They repel (push away from each other).
Why might an engineer change or improve a design after testing it?
To make it work better or solve the problem more effectively.
Why is it important to record data during an experiment?
To keep track of results and use evidence to support conclusions.
If two people push a box with equal force in opposite directions, what happens to the box's motion?
The forces are balanced, so its motion does not change.
Why might a balloon rocket move when air escapes from the balloon?
The escaping air creates an unbalanced force that makes the balloon move.
Can magnets attract objects without touching them?
Yes! Magnets can exert forces at a distance.
If you needed to design a device to keep a door shut using magnets, what scientific idea could help you?
Magnetic attraction between opposite poles.