SCIENTIFIC METHOD
What is the first step in the scientific method?
Ask a question/identify a problem
Energy is the ability to do what?
Do work
What moves through a wire to create electric current?
Electrons
A push or pull is called what?
Force
The Law of Conservation of Energy states that energy cannot be created or destroyed, but energy can ________. Name two different energy transformations that occur when a television is turned on.
Energy can change from one form to another (be transformed).
A television changes electrical energy into light energy and sound energy (and also thermal energy).
An educated guess is called what?
Hypothesis
Stored energy is called what?
Potential energy
What is a complete path for electricity called?
Circuit
Newton's First Law is also called the law of what?
Inertia
An object accelerates at 3 m/s² when a 10-N force is applied. Assuming the mass stays the same, what force would cause the object to accelerate at 6 m/s², and which of Newton's Laws explains your answer?
20 N
Newton's Second Law (F = ma) explains that doubling the force doubles the acceleration when mass remains constant.
Which variable is changed by the scientist?
Independent variable
Energy of motion is called what?
Kinetic energy
Materials that allow electricity to flow easily are called what?
Conductors
What is the formula for Newton's Second Law?
Force = Mass × Acceleration (F = ma)
A student mixes iron filings, black pepper, and water together. Describe the steps and equipment needed to separate all three materials.
Which variable is measured?
Dependent variable
Name one form of energy besides kinetic or potential
Thermal, electrical, light, sound, chemical, etc.
What are the two poles of a magnet?
North and South
Newton's Third Law says every action has what?
An equal and opposite reaction
A light bulb will only light if there is a complete path for electricity to travel. If a student connects points A and B with a plastic straw, copper wire, wooden stick, and rubber band, which material will light the bulb and why?
Copper wire, because it is a conductor that allows electric current to flow.
Why is a control group important?
It provides a comparison for the experiment.
What law states energy cannot be created or destroyed?
Law of Conservation of Energy
What happens with like magnetic poles
They repel
A 10 kg object accelerates at 2 m/s². What force is applied?
20 N
Look at this chemical equation:
2H₂ + O₂ → 2H₂O