You are injured playing sports. Your parent gives you a heat pack. What energy conversion occurs when you squeeze the pack so the substances inside can mix together?
chemical energy is converted to heat
100
gasoline is transformed from ___ energy into mechanical energy in a motorcycle engine.
chemical
100
Which TWO are good conductors of electricity?
plastic spoon silver chain glass stirring rod wooden dowel
metal coin paper cup
100
When will a roller coaster have maximum potential energy?
at the top of a hill
100
What energy causes air rising from the land to be warm and causes wind?
sunlight DUH!!
200
What is the energy transformation for a flashlight, including the battery?
chemical energy --> electrical energy --> heat and light energy
200
A baseball on top of a table has what type of energy?
gravitational
200
If a student replaces the swith in a circuit with a rubber band and electricity does not flow through the circuit, it is most likely because the rubber band is a(n) ________.
insulator
200
Which bow has maximum potential energy?
C
200
During the day, the land heats ___ than the surface of the ___
faster sea
300
What is the energy transformation for #2?
chemical energy --> electricity --> thermal enegy + light
300
What device converts electrical energy into sound?
a speaker or some device with a speaker
300
What type of circuit is described?
Every device must function for the circuit to be complete.
series circuit
300
At which point is kinetic energy greatest in diagram #4?
C
300
Hot air ____; cool air _____.
rises; sinks
400
Sunlight --> Change in air pressure
describes how what is made
wind
400
A barometer reading of 29.80 mm Hg and falling probably means the weather will be:
cloudy
400
DAILY DOUBLE
Draw a closed circuit with source, switch and load.
Drawing
400
Identify each potential energy: a fuel tank containing gasoline a stretched rubber band a book resting on a shelf
chemical elastic gravitational
400
Solar energy --> warm air rises --> air cools in upper atmosphere and sings--> air currents
This describes ___ formation.
wind
500
If you throw keys up into the air, why do they slow as they move upwards?
The key's kinetic energy is converted into gravitational potential energy.
500
When a sled goes down snow-covered hill how does its potential and kinetic energy change?
It has maximum potential energy at the top of the hill. Kinetic energy increases and potential energy decreases as it goes down.
500
What is a valid conclusion for data in chart #3?
Metals conduct electricity more readily than nonmetals.
500
When is potential energy the greatest?
D
500
Warm ____ near the poles rises and moves toward the equator.