Physical Science 2016 Pretest (year)

When a pencil is placed in a cup of water, the pencil looks bent.

• reflection
• refraction
• interference
• diffraction

When the motor is connected to a battery, the loop rotates. When the motor is disconnected, the loop stops rotating. Which of these statements best explains why the loop only turns when the motor is connected to the battery?A motor is created when a copper loop is placed between two permanent magnets as shown in the diagram below.

• The battery moves electrons in the permanent magnets to build an electric field.
• The battery causes the loop to conduct electricity through the magnets.
• The battery moves electrical charges through the loop creating a magnetic field.
• The battery pushes protons through the commutator, causing magnetism.

The range of all forms of radiant energy is called the

• video spectrum.
• audio spectrum
• color spectrum
• electromagnetic spectrum

Which statement below correctly describes water?

• Water is an ionic crystalline compound
• The atoms in a water molecule are bonded covalently
• A sample of water has a definite volume and definite shape
• A water molecule consists of two atoms of hydrogen and two atoms of oxygen.

A student is playing with a small toy boat on a pond. The student throws a rock in the pond. This creates waves that move the boat toward the shore. The boat moves toward the shore because the waves transfer

• energy
• heat
• motion
• water

Two waves have the following waveforms.

• Wave A has higher frequency.
• Wave A is an ultraviolet wave.
• Wave B has greater energy.
• Wave B is a visible light wave.

A glass of water left in the sun becomes warm. Estella adds ice to the water to make it cool. What energy change occurs when ice is added to the warm drink?

• The water loses heat to the ice, causing the ice to melt.
• The water absorbs the cold temperature from the ice.
• Since the ice is cold, it adds cold to the environment.
• The melting ice causes the water to expand, cooling it.

Which statement classifies the sound wave?A stereo speaker is made of a flexible cone-shaped material that vibrates, creating a sound wave. A sound wave formed by a speaker travels through air to your ear as a series of compressions and rarefactions of air molecules.

• transverse wave in which the particles of the wave move in a direction parallel to the wave motion
• longitudinal wave in which the particles of the wave move in a direction parallel to the wave motion
• transverse wave in which the particles of the wave move in a direction perpendicular to the wave motion
• longitudinal wave in which the particles of the wave move in a direction perpendicular to the wave motion

A light wave travels through the air, passes through glass, and then travels back into the air.

• The light wave is refracted.
• The light wave is diffused.
• The light wave is diffused.
• The light wave is reflected.

An X-ray was detected having a wavelength of 1 X 10^-11 m, the speed of light is 2.99 X 10 ⁸ m/s.  What is the frequency of the wavelength?

• 3.34 X 10^-20 Hz
• 2.99 X 10 ¹⁹ Hz
• 2.99 X 10 ^-3 Hz
• 3 X 10 ⁵ Hz