Unit 3 Energy Quizizz

How can this graph describe why water can be 100 degrees Celsius and still be water?

• Water will continue rising in temperature after reaching 100 degrees C, while it is turning into a gas.

• Once the water reaches 100 degrees C, it will immediately turn into a gas

• This graph is incorrect. The moment water reaches 100 degrees Celsius, it turns into a gas

• Once water is 100 degrees Celsius, it needs extra energy, in the form of heat added, to finish turning into a gas. Once a gas, it can continue gaining temperature as it gains heat. Otherwise, the water in the system will remain 100 degrees until that point.

A waterfall is an example of 

• potential energy being converted into kinetic energy

• kinetic energy being converted into potential energy

• energy being created

• energy being destroyed

Which of the following is an example in which kinetic energy is converted to potential energy?

• A rock falls down a cliff

• a light bulb glows brightly

• a spring is stretched

• A match burns

Answer explanation

This is an example of elastic potential energy

At the top of its swing, a pendulum has zero kinetic energy.  How much potential energy does it have at the bottom of the swing?

• maximum

• 1/2 as much

• 1/4 as much

• zero

A book is pushed off the edge of a table.  At what point during the fall will the potential and kinetic energy be equal?

• 1/4 of the way down

• 1/2 of the way down

• 3/4 of the way down

• right before it hits the ground.

In a windmill, the blades spin due to the energy from the wind.  The wind is caused by differences in temeperature.  Grain is crushed into powder from the rolling wheel in the windmill.  All of these examples are what kind of energy?

• chemical

• potential

• electrical

• kinetic

Where does the frog possess kinetic energy?

• P

• Q

If we wish to increase the kinetic energy of a system the most,

• we can increase the mass of the system, but not the speed

• we can increase the speed of the system, but not the mass

• we can increase both the mass and speed of the system

• we must keep the mass and speed the same.

If boiling water is thrown in the air and the water freezes into snow, we can assume that the temperature....

• is at exactly zero degrees

• At 100 degrees

• Below zero degrees

• Somewhere between 0-100 degrees.

When hot water is thrown in cold air, how are the water particles affected by changes in thermal energy?

• The water particles gain thermal energy and this causes the particles to increase in kinetic energy, resulting in an increase in thermal energy of the water.

• The water particles lose thermal energy to the cold air, causing the water particles to have less kinetic energy, causing a drop in the water's temperature

• The water particles lose thermal energy, causing the temperature to decrease, causing an increase in kinetic energy in the water.

• The water particles gain thermal energy, causing an increase in kinetic energy, causing them to spread out and decrease in temperature.