Physical Sciences Review

What is the smallest unit of an element called?

• atom

• molecule

• cell

• proton

What do we call a material that electricity can pass through easily?

• conductor

• insulator

• plastic

• rubber

What happens when two magnets are brought close together with the same poles facing each other?

• They repel each other.

• They attract each other.

• They stick together.

• Nothing happens.

What is the term for the highest point of a wave?

• What is the crest?

• What is the trough?

• What is the amplitude?

• What is the wavelength?

How is a wave frequency defined?

• It is the number of waves that pass a point in 1 second.

• It is the distance between two crests of a wave.

• It is the height of the wave from its rest position.

• It is the speed at which the wave travels.

What is the pH scale used to measure?

• the acidity or basicity of a solution

• the temperature of a solution

• the density of a solution

• the color of a solution

What is the relationship between wavelength and frequency in waves? What is its equation?

• As wavelength increases, frequency decreases, and vice versa, which can be expressed as v = f x λ

• As wavelength increases, frequency also increases, which can be expressed as v = f + λ

• Wavelength and frequency are unrelated, and the equation is v = f / λ

• As frequency increases, wavelength remains constant, which can be expressed as v = λ - f

What is the law that states matter cannot be created or destroyed in a chemical reaction?

• Law of Conservation of Mass

• Law of Definite Proportions

• Law of Multiple Proportions

• Law of Constant Composition

What is the unit of measurement for electrical resistance?

• ohm

• watt

• volt

• ampere

Ohm’s Law is expressed mathematically as:

• V = I/R

• V = IR

• I = VR

• R = VI