# Introduction To Physical Science

## Chapter 18: Electromagnetic Waves

### Section 1 Self-Check Quiz-Eng.

 1 Which of the following types of waves can travel through space? Need a Hint? A) electromagnetic B) mechanical C) transverse D) compressional 2 Waves that use matter to transfer energy are called __________ waves. Need a Hint? A) electromagnetic B) mass C) mechanical D) medium 3 Sound waves cannot travel in outer space because __________. Need a Hint? A) they are electromagnetic waves B) the gas molecules in outer-space are too far apart C) they cannot travel through a medium D) they are mechanical waves 4 What type of waves do not require matter to carry energy? Need a Hint? A) electromagnetic B) mechanical C) compressional D) transverse 5 Electromagnetic waves are made by __________. Need a Hint? A) vibrating air molecules B) vibrating electrical charges C) vibrating water molecules D) strong compressions 6 The interaction between two magnets is called __________. Need a Hint? A) magnetic force B) a magnetic field C) polarity D) current 7 What exerts the force that causes other electric charges to move? Need a Hint? A) electrical poles B) insulators C) conductors D) the electric field 8 Protons have a __________ charge and electrons have a __________ charge. Need a Hint? A) positive, negative B) positive, neutral C) negative, positive D) negative, neutral 9 Electric current passing through a wire produces __________. Need a Hint? A) a permanent magnet B) geographic poles C) a compass D) a magnetic field around the wire 10 Magnetic fields that surround all magnets exert __________. Need a Hint? A) the magnetic force B) electric current C) air pressure D) resistance 11 The negatively charged particles in an atom are called __________. Need a Hint? A) protons B) neutrons C) negatrons D) electrons 12 __________ is the number of vibrations that occur in 1 s. Need a Hint? A) Wavelength B) Frequency C) Amplitude D) Interference 13 The energy carried by an electromagnetic wave is called __________ energy. Need a Hint? A) mechanical B) thermal C) radiant D) potential 14 __________ is the distance from the top of one crest of a transverse wave to the top of the next crest in that wave. Need a Hint? A) Amplitude B) Frequency C) Wavelength D) Wave velocity 15 In which of the following materials will light travel fastest? Need a Hint? A) air B) water C) vacuum D) glass