_________ is the process an animal uses to locate an object by means of reflected sound waves.

A(n) _____ is a neutral subatomic particle in the nucleus of an atom.

A(n) _________ is an outermost electron of an atom that participates in chemical bonding.

______ is the number of wavelengths that pass by a point each second.

A(n) ____ is the material in which a wave travels.

A(n) _____ is an atom of the same element that has a different number of neutrons.

A(n) ____ is a reflected sound wave.

A(n) _____ is a positively charged particle in the nucleus of an atom.

A(n) _____ is a negatively charged particle in the nucleus of an atom.

A(n) _____ is a wave in which the disturbance is parallel to the direction the wave travels.

A(n) _____ is a wave in which the disturbance is perpendicular to the direction the wave travels.

The ____ is the perception of how high or how low a sound is.

____ is the amount of energy that passes through a square meter of space in one second.

____ is a low-frequency, low-energy electromagnetic energy wave that has a wavelength between 1 mm and 30 cm.

____ is a high-energy electromagnetic energy wave that has a slightly shorter wavelength and higher frequency than ultraviolet waves.

A(n) ____ is a high-energy electromagnetic energy wave with the shortest wavelength.

_______ is the part of the electromagnetic spectrum that we can see.

____ is the region of a longitudinal wave where the particles of the medium are close together.

____ is the region of a longitudinal wave where the particles of the medium are far apart.

____ is the maximum distance a wave varies from its rest position.

The ___ is the highest point on a transverse wave.

The ___ is the lowest point on a transverse wave.

A(n) ____ is formed when many metal atoms share their pooled valence electrons.

A(n) ____ is the attraction between positively and negatively charged ions in an ionic compound.

A chemical bond formed when two atoms share one or more pairs of electrons is called a(n) _____.

____ occurs when an object vibrating at its natural frequency absorbs energy from a nearby object vibrating at the same frequency.

____ is the study of how sound interacts with structures.

A(n) ____ is an electromagnetic wave that has a wavelength shorter than a microwave but longer than visible light.

A(n) ____ is a wave that can travel only through matter.

The _____ is the region in the center of the atom where most of the atom's mass and positive charge are concentrated.

A(n) ____ is low-frequency, low-energy electromagnetic wave that has a wavelength longer than 30 cm.

A(n) ____ is an electromagnetic wave that has a slightly shorter wavelength and higher frequency than visible light.

A longitudinal wave that can only travel through matter is called a(n) _____.

A(n) ____ is an atom that is no longer neutral because it has lost and gained electrons.

A disturbance that transfers energy from one place to another without transferring matter is called a(n) ___.

A material that allows almost all of the light that strikes it to pass through and form a clear image is _____.

A material through which light does not pass is ____.

A material that allows most of the light that strikes it to pass through and form a blurry image is ____.

Reflection of light from a smooth, shiny surface is called _______.

The transfer of energy by a wave to the medium through which it travels is called _____.

_____ is the passage of light through an object.

Reflection of light from a rough surface is called _____.

A lens that is thicker at the edges than in the middle is a ____.

A ____ is a mirror that curves inward.

A lens that is thicker in the middle than at the edges is a ____.

A material in which electrons can easily move is a(n) ___________________.

A material in which electrons cannot easily move is a(n) ___________________.

Providing a path for electric charges to flow safely into the ground is called __________________.

______________________ is a measure of how difficult it is for an electric current to flow in a material.

A(n) ____________________  _________________ is an electric circuit with more than one path for an electric current to follow.

The movement of electrically charged particles is a(n) __________________  __________________.

A closed, or complete, path in which an electric current travels is a(n) _______________  _______________.

A(n) _______________  ______________ is an electric circuit with only one path for an electric current to follow.

A magnet that remains a magnet after being removed from another magnetic field is a(n) __________________  _____________.

A magnet that quickly loses its magnetic field after being removed from a magnetic field is a(n) ______________________  ________________.

Any material that is strongly attracted to a magnet is called a(n) __________________  _______________.

A(n) _______________________ is a magnet created by wrapping a current-carrying wire around a ferromagnetic core.

An electric current that flows in one direction is _______________  ___________________.

An electric current that changes direction in a regular pattern is _____________________  __________________.

A(n) _________________  ________________ is a device that uses an electric current to produce motion.

A(n) ____________________  ___________________ is a device that uses a magnetic field to transform mechanical energy into electric energy.