Science Method
What is the first step of the scientific method?
Ask a question or identify a problem.
What should you do before starting a science investigation?
Read and follow the safety instructions.
What is a force?
A push or a pull.
What is energy?
The ability to do work or cause change.
What science tool is used to measure mass?
A balance.
What is a hypothesis?
A testable prediction.
What should you do if you spill something during an experiment?
Tell the teacher immediately.
What force pulls objects toward Earth?
Gravity.
What type of energy is stored in a stretched rubber band?
Elastic potential energy.
What is the difference between an observation and an inference?
An observation uses senses or measurements; an inference is an explanation based on evidence.
What is a variable in an experiment?
Something that can change.
Why do scientists wear safety goggles?
To protect their eyes.
What is friction?
A force that opposes motion between touching surfaces.
What energy transformation happens when a flashlight is turned on?
Chemical → Electrical → Light energy.
Why does a toy car slow down faster on carpet than on a smooth floor?
Carpet creates more friction.
Why should scientists change only one variable at a time?
To make sure the experiment is a fair test.
Why should you never taste or smell unknown chemicals?
They could be harmful or dangerous.
What happens when unbalanced forces act on an object?
The object's motion changes.
What energy transformation happens when a toaster is turned on?
Electrical → Thermal energy.
What energy transformation happens when an electric fan is turned on?
Electrical → Mechanical (motion) energy.
A student tests how sunlight affects plant growth. What is the independent variable?
The amount of sunlight.
What should you do if glass breaks during an investigation?
Stay away from the glass and notify the teacher.
Two students push a box in opposite directions with equal force. If the box starts at rest, what happens?
The box stays still because the forces are balanced.
What energy transformation happens when a roller coaster moves down a hill?
Gravitational potential → Kinetic energy.
A toy car rolls down a ramp. Name two forces acting on the car.
Gravity and friction.