Types of Energy
Mechanical energy is the
a. total of all the potential energy in an object
b. total of all the kinetic energy in an object
c. total of an object's potential energy and kinetic energy
c. total of an object's potential energy and kinetic energy
Heat energy always flows from -
a. hot objects to hotter objects
b. warmer objects to cooler objects
c. cooler objects to warmer objects
b. warmer objects to cooler objects
Martino pushes a rock off his desk. What happens to the mechanical energy of the rock as it falls?
a. it increases
b. it stays the same
c. it loses kinetic energy
a. it increases
Which object produces light energy and heat energy, but not sound energy?
a. computer
b. power drill
c. desk lamp
c. desk lamp
When you hear a sound, it has a pitch. What is a change in pitch most related to?
a. how big the vibration is
b. how fast the source vibrates
c. how long the source vibrates
b. how fast the source vibrates
When you clap your hand together really hard, what two kinds of energy do you observe?
a. mechanical and sound
b. heat and sound
c. heat and mechanical
a. mechanical and sound
Which action produces the most friction and heat?
a. gently brushing face paint onto your cheeks
b. rubbing your bare hands together numerous times
c. rubbing your soapy hands under water
b. rubbing your bare hands together numerous times
As you slide down a slide, which statement is true?
a. you lose kinetic energy
b. you gain potential energy
c. potential energy is about to change
c. potential energy is about to change
Blake looks at the fish from above the water, and they look large. When Blake looks at them from under the water, they look smaller. What happens to the light as it travels from the water to the air?
a. it bends b. it stops c. it reflects
a. it bends
a. They want to plan a good investigation
b. they want to ask the right scientific questions about the sound
c. they want to have good records of their observations
c. they want to have good records of their observations
Name four types of energy.
heat, sound, light, electrical
Vertran stands his bicycle upside down. Mike holds a piece of cardboard agains the rear wheel while pat turns the pedals by hand. What can you infer about the cardboard?
a. it will turn red
b. it will get cooler
c. it will get warmer
c. it will get warmer
Janiya turns the propeller of a toy airplane. By doing so, she twists a rubber band. She has to hold the propeller to keep the rubber band from turning it. What happens to the propeller's energy when ella lets go?
a. kinetic energy decreases
b. potential energy increases
c. potential energy changes into kinetic energy
c. potential energy changes into kinetic energy
Amir pointed a flashlight. The light hit an object and traveled back toward Mia. Which of the following objects did the light most likely strike?
a. a large mirror
b. a brick wall
c. a clear glass window
a. a large mirror
How is sound measured?
a. inches
b. decibels
c. grams
b. decibels
What has more potential energy?
a. a ball that is sitting on a floor
b. a ball that is rolling down a slide
c. a ball on the edge of a building roof
c. a ball on the edge of a building roof
Nadia want to explore heat. He sets a piece of cheese outside on a sunny day. The cheese is now melted. Which explains why the cheese is melted?
a. heat moved from the sun to Nadia
b. Heat moved from Nadia to the cheese
c. Heat moved from the sun to the cheese
c. Heat moved from the sun to the cheese
Which type of slide would have the most friction when going down it?
a. a slide that is straight
b. a slide that is twisted
c. a slide that is wet
a. a slide that is straight
In his model, Carter is using a tennis ball as the light source. He is using string to represent light. How should he use the string to model the way that light travels?
a. tape the string so that it forms a tiny zigzag
b. pull the string tight so it forms a straight line
c. wind the string around a pencil so that it forms a spiral
b. pull the string tight so it forms a straight line
How does a musician control the volume of their instrument?
a. by applying more or less force
b. by cleaning the instrument
c. by going to school to learn to play it
a. by applying more or less force
Lemani loves to dance. She turns on her radio to find some music. Which statement explains how the radio uses energy?
a. light energy turns into sound energy
b. electrical energy changes into sound energy
c. sound energy changes into mechanical energy
b. electrical energy changes into sound energy
Which will be hotter to the touch when sitting in the sun?
a. a metal bike
b. a plastic ball
c. melted ice cream
a. a metal bike
If you rub two wooden chopsticks together, they get warm. if you put soapy water on them, they will not get as warm when rubbed together. Which statement explains what the soapy water does to the chopsticks?
a. it increases the friction
b. it decreases the friction
c. it decreases the wood's ability to produce heat
b. it decreases the friction
Anyla shines a light on a piece of aluminum foil. Then light appears on the ceiling. Why does this happen?
a. The aluminum foil reflects the light
b. the aluminum foil refracts the light
c. the aluminum foil absorbs the light
a. The aluminum foil reflects the light
what is pitch when related to sound?
a. how fast something vibrates
b. how loud something is
c. when you throw a ball
a. how fast something vibrates