Energy
Solar energy is one type of alternative energy currently being investigated. Which of these is a benefit of solar energy?
A. Solar energy cannot be converted into other forms of energy.
B. Solar energy is the most effective fossil fuel.
C. Solar energy does not pollute the air.
D. Solar energy is not renewable.
C. Solar energy does not pollute the air.
Logan picks up a book from the ground. He drops it back on the ground. How does the book's energy before it is picked up compare to it's energy after it falls?
A. The book has more potential energy before it is picked up than it has after it falls.
B. The book has the same potential energy before and after it falls.
C. The book has more kinetic energy after it falls that it has before it is picked up.
D. The book has less potential energy after it falls that it has before it is picked up.
B. The book has the same potential energy before and after it falls.
A book falls on the floor. Which is the MAIN form of energy that results when the book strikes the floors?
A. Chemical Energy
B. Sound Energy
C. Kinetic Energy
D. Heat Energy
B. Sound Energy
Payton pulls his sister in a wagon on a flat sidewalk. Which is the source of energy that moves the wagon?
A. Gravitational energy pulling on the wagon
B. Potential energy from the ground below
C. Kinetic energy from the rolling wheels
D. Chemical energy in Payton's muscles
D. Chemical energy in Payton's muscles
What type of energy is responsible for powering photosynthesis?
Light Energy
The energy of flowing water can be converted into other forms of energy. Which form of energy does flowing water possess that can be converted into other forms of energy?
Kinetic Energy
When you pluck a rubber band, it makes a sound. What can you do to make the sound softer?
Stretch the band LESS to the side before letting it go.
Jayden toasts a piece of bread in a toaster connected to a wall outlet. Which is the source of energy for the toaster?
Electrical Energy
Chloe cooks a pizza in a gas oven. Which form of energy cooks the pizza?
Heat
Victoria plays the guitar and Hailey plays the drums. Victoria's guitar makes a higher sound than Hailey's drums. Which reason best describes why this might happen?
A. The drum has a higher pitch than the guitar.
B. The drum makes a louder sound than the guitar.
C. The guitar's parts vibrate, but the drum's parts do not.
D. The guitar's parts vibrate more quickly than the drum's parts.
D. The guitar's parts vibrate more quickly than the drum's parts.
Rubber bands can be stretched to many different lengths. The band can be pulled to the side and let go to make a sound. The original rubber band is 4cm. Stretched rubber band A is 12cm and the stretched rubber band B is 8cm.
What would you predict about the pitch of the sound of rubber band B compared to rubber band A?
The pitch would be lower
Brendan and Maddox are using a spring to send balls into the air. Brendan's ball travels 10m. Maddox squeezes the spring until it it shorter than Brendan's spring. How far is Maddox's ball likely to go?
15m
A battery provides __________ energy. When a battery is connected to a light bulb with wires, a closed circuit is formed.
Electrical energy
How do potential energy or kinetic energy compare to each other?
A. Both describe objects at rest.
B. Both describe objects in motion.
C. Both are forms of mechanical energy.
D. An increase in one leads to an increase in the other.
C. Both are forms of mechanical energy.
Students are making rubber bands vibrate. If one rubber band is thicker than another, what happens to the pitch?
It is Lower.
What type of energy makes a Solar powered calculator work?
Solar Energy
What form of energy does an unlit match contain?
Chemical Energy
Alijah's science class has to choose an example of potential energy changing into kinetic energy. Which could he pick?
A. Sun warming a greenhouse
B. Magnet attracting little pieces of iron
C. Battery in a drawer
D. Baseball as it leaves a pitcher's glove
D. Baseball as it leaves a pitcher's glove
Larain and Layrah are investigating the sound made by rubber bands. They listen to the sound. Then they carefully write what they heard. Which of the following gives the best reason that they do this?
A. They want to ask the right scientific questions about sound.
B. Their good observations are their conclusions.
C. They want to have good records of their observations.
D. They want to plan a good investigation.
C. They want to have good records of their observations.
A town in Florida has enough solar panels to provide energy to each house in the town. One solar panel can generate enough energy for 4 homes. If the town has 8,000 solar panels, how many homes are in this Florida town?
32,000 homes