Energy - 3rd Grade TEKS

What is sound energy?
 

• energy that can be seen
• energy that can be heard
•  the flow of energy from a warmer object to a cooler object 
• the combination of an object’s potential and kinetic energy 

Look at the picture below. What two forms of energy does the fan have once it is turned on?
 

• light and kinetic
• sound and kinetic
•  light and potential
•  sound and potential 

The leaves on the trees in Heather’s backyard are changing colors. What form of energy allows Heather to see these different colors?

• heat energy
• light energy
• sound energy
• mechanical energy

Mechanical energy is the—
 

• total of all the potential energy in an object
• total of all the kinetic energy in an object
•  total of an object’s potential energy and kinetic energy
• total of an object’s stored energy and potential energy 

When you clap your hands together really hard, what two kinds of energy do you observe?
    

• heat and sound
• light and sound
• heat and mechanical
• mechanical and sound

Heat energy always flows from—
   

• hot objects to hotter objects
• cooler objects to warmer objects
• warmer objects to hotter objects
• warmer objects to cooler objects 

Which action produces the most friction and heat?
gently brushing face paint onto your cheeks   

• gently brushing face paint onto your cheeks
• rubbing your bare hands together numerous times
• rubbing your soapy hands under water 
• smoothing hand lotion onto the palms of your hands

Sid pushes a rock off his desk. What happens to the mechanical energy of the rock as it falls?
  

• It increases.
• It stays the same.
• It loses kinetic energy.
•  It gains potential energy. 

Which object produces light energy and heat energy but not sound energy?
  

• computer 
• desk lamp
• power drill
• radio 

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?
 

• It stops. 
• It bends.
• It reflects.
• It is absorbed.