50 Question 1st Semester Science Final Exam

Front

What part of a car causes negative acceleration?

Back

Brake pedal is the part of a car that causes negative acceleration by applying force to slow down the vehicle.

Front

How are wavelength and frequency related?

Back

As frequency increases, wavelength decreases. This means that higher frequency waves have shorter wavelengths.

Front

What is an example of sliding friction?

Back

An example of sliding friction is a boy pushing a box across the floor, where two surfaces are in contact and sliding against each other.

Front

Order the following objects from least inertia to greatest inertia: Feather, horse, brick, elephant.

Back

The correct order from least inertia to greatest inertia is: Feather, brick, horse, elephant.

Front

What optical phenomenon causes a person standing waist-deep in a swimming pool to appear to have short legs?

Back

Refraction is the optical phenomenon that causes the bending of light, making a person appear to have short legs when standing in water.

Front

What is inertia?

Back

Inertia is the property of an object to resist changes in its state of motion. The more mass an object has, the greater its inertia.

Front

Define friction.

Back

Friction is the force that opposes the motion of an object when it is in contact with another surface.

Front

What is the difference between static and kinetic friction?

Back

Static friction acts on objects that are not moving, while kinetic friction acts on objects that are sliding over each other.

Front

What is the formula for calculating speed?

Back

Speed is calculated using the formula: Speed = Distance / Time.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.