Chapter 1 Test

Match each vocabulary term to its definition. conduction he transfer of heat that occurs when one thing touches another convection the transfer of thermal energy as matter moves` radiation energy that is sent out in waves refraction the bending of light when it passes into a new medium reflection occurs when light rays bounce off a surface Match each vocabulary term to its definition. absorption occurs when an object takes in light waves pitch how high or low a sound is volume a measure of how strong a sound seems to us amplitude the height of a wave measured from its midline wavelength the distance between a point on one wave and a similar point on the next wave frequency number of waves that pass a point in a certain amount of time Match each term to its definition sound energy in the form of vibrations passing through matter energy the ability to cause motion or create change kinetic energy energy of motion potential energy energy that is stored in an object Which type of energy is formed by vibrating objects? light energy sound energy thermal energy electrical energy Which type of energy does moving water have? electrical kinetic thermal potential A guitarist strums two strings of the same thickness on a guitar. The first string vibrates more quickly than the second string. What is true about the pitch of the strings? The first string has a higher pitch than the second string. The second string has a higher pitch than the first string. The first string and the second string have the same pitch. The pitch of the second string depends on the pitch of the first string. Which is the best description of a sound wave when the pitch of the sound is very high? It has a low frequency. It has a high frequency. It has no wavelength. It has no frequency. How do white light waves act when they enter a prism? They are reflected. They become raindrops. They bend or refract. They are absorbed. Which of the following can act like a prism? a radio a raindrop a piece of paper a laser Look carefully at the illustration. How is heat transferred from the campfire DIRECTLY to the people? conduction insulation convection radiation Which of the following shows conduction? The sun warms your skin. The oven heats your house. A metal spoon in soup becomes warm. Fire in a hot air balloon allows it to lift into the sky. Use the picture of the television above to answer the question.Which statement describes the flow of energy through the television set shown? Heat energy changes into electrical energy and sound energy. Light energy changes into sound energy and electrical energy. Electrical energy changes into light and sound energy. Sound energy changes into light energy and electrical energy. If you want to stay cool while playing outside on a sunny day, which is better to wear: a black T-shirt or a white T-shirt? Explain your answer. You must write at least one complete sentence. Explain why ice might melt after you have skated on it. You must write at least one complete sentence. Give an example of how energy changes from potential energy to kinetic energy and back to potential energy.