Energy

Which of these will complete the circuit and allow electricity to flow?
1. clothes hanger
2. glass
3. leather jacket
Which of the bulbs will light?
1. a
2. b
3. c
4. none of the above
Which of the following objects most likely reflects light?
Martha used the materials shown to form a circuit. Which of these represents the source of the electricity?
Martha wore rubber gloves while she was working on the circuit. Why did she do this?
1. Rubber is a good conductor, and Martha wanted electricity to pass through them.
2. Rubber is a good insulator and it would protect Martha's hands.
3. Rubber is the source of energy.
4. Only rubber can complete a circuit.
Electricity flows easiest through
1. wood
2. metal
3. plastic
4. cotton
The ability to do work comes from
1. matter
2. sound
3. energy
4. intelligence
Which of the following is an example of a source of light energy?
1. a stereo speaker
2. the Sun
3. the moon
4. a magnet
The source of solar energy is
1. the sun
2. the moon
3. rock
4. ice
Sound is produced by
1. vibrations
2. light
3. patterns
4. space
The bending of light waves as they travel from one surface to another is called
1. light
2. reflection
3. refraction
4. magnification
Look at the model. What must be done to complete the circuit?
1. Cut the wire
2. Remove the wire and place the bottom of the light bulb on top of the battery
3. Add a wire that runs from the bottom of the battery to the top of the battery.
4. Add a wire that runs from the bottom of the battery to the side of the metal base of the light bulb
Which of these is NOT a source of light?
1. water
2. the sun
3. flashlight
4. camp fire
What kind of energy is used when you are riding your bicycle?
1. chemical energy
2. mechanical energy
3. heat energy
4. light energy
Metal allows energy to pass through because it is
1. a magnet
2. an insulator
3. a conductor
4. a transporter
Sam hummed. While he hummed he touched his throat. He felt his neck vibrate. Sam realized that the vibrations in his neck were related to the sound of his humming. This is because
1. sound can only be made by living organisms
2. vibrations produce sound
3. vibrations limit sound
4. all sounds made by humans originate in the neck
A jar of very cold milk is taken out of the refrigerator and left on a counter in the kitchen. Two hours later, the milk feels warm. Which of the following best explains what happened?
1. Energy moved from the air in the room into the jar of milk.
2. Air in the room insulated the jar of milk from heat.
3. Energy moved from the milk into the warm air of the room.
4. The jar of milk was insulated from the movement of heat.
A radio is hooked up to an outlet powered by a solar panel. Which is the correct sequence of energy transfer?
1. Heat energy to sound energy to light energy
2. Sound energy to light energy to electrical energy.
3. Light energy to electrical energy to sound energy.
4. Electrical energy to sound energy to light energy.
A student did a science project to find out what would happen when a container of salt water was placed in the sun. He placed one cup of salt water in a shallow pan and placed it in the sun. The next day all of the water had evaporated and only salt was left in the pan. Which of the following explains what happened?
1. The water in the pan changed from a liquid to a solid.
2. The water in the pan changed from a solid to a liquid.
3. The water in the pan changed from a liquid to a gas.
4. There was no change in the salt water.
A mouse was spotted in the house. Father bought two mousetraps and placed them in the kitchen. In which order must the events happen so that the mousetraps work and the mouse is caught?
1. Place the cheese, pull back the spring, buy the cheese, secure the spring.
2. Pull back the spring, buy the cheese, secure the spring, place the cheese.
3. Secure the spring, buy the cheese, place the cheese, pull back the spring.
4. Buy the cheese, place the cheese, pull back the spring, secure the spring.