Which statement correctly describes a property of sound waves? (1 point) They have two kinds of movement. They can travel through outer space. They are generated by movements in Earth's crust. They require particles to transfer energy.

## Step 1<br />Sound waves are a type of mechanical wave. Mechanical waves require a medium to travel through, such as air, water, or a solid substance. This is because they are generated by the vibration of an object, which causes the surrounding medium to also vibrate and transfer energy.<br /><br />## Step 2<br />Sound waves cannot travel through outer space because there is no medium (like air) in space. This is why astronauts cannot hear each other in space.<br /><br />## Step 3<br />The statement that sound waves are generated by movements in Earth's crust is not accurate. While it is true that earthquakes generate seismic waves, which are a type of mechanical wave, these are not sound waves. Seismic waves are generated by the movement of the Earth's crust, not by the vibration of an object.<br /><br />## Step 4<br />The statement that sound waves have two kinds of movement is not accurate. Sound waves are longitudinal waves, which means they move in the same direction as the wave. This is different from transverse waves, which move perpendicular to the wave.