(Savvas 15.2) Ch. 15.2 Energy Conversion and Conservation

Is the following sentence true or false? Energy can be converted from one form to another.

• True

• False

Tags

NGSS.HS-PS3-3

When a wind-up toy is set in motion, elastic potential energy that was stored in a compressed spring is primarily converted into the _______ of the toy’s moving parts.

• kinetic energy

• thermal energy

• sound energy

• chemical energy

Tags

NGSS.HS-PS3-3

Is the following sentence true or false? The action of striking a match shows that stored chemical energy in the match can be converted into thermal energy and electromagnetic energy of the flame.

• True

• False

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

The law of conservation of energy states that:

• Energy can be created or destroyed.

• Energy can be transformed from one form to another, but cannot be created or destroyed.

• Energy is always increasing in the universe.

• Energy is only conserved in closed systems.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-1

Is the following sentence true or false? When an object slows down because of frictional force acting on it, an amount of energy is destroyed that is equivalent to the decrease in kinetic energy of the object.

• True

• False

Tags

NGSS.MS-PS3-5

A moving object slows down because friction causes a continual conversion of kinetic energy into _______.

• thermal energy

• sound energy

• potential energy

• electrical energy

Tags

NGSS.HS-PS3-4

As an object falls, the gravitational potential energy of the object is converted into _________________.

• kinetic energy

• thermal energy

• sound energy

• chemical energy

Choose the letter of each sentence that is true about pendulums.

• A pendulum consists of a weight suspended from a string that swings back and forth.

• The weight at the end of a pendulum reaches maximum kinetic energy at the highest point in the pendulum’s swing.

• Potential energy and kinetic energy undergo constant conversion as a pendulum swings.

• Frictional forces enable a pendulum to continue swinging without slowing down.

Tags

NGSS.MS-PS3-5

At what point during a pole-vaulter’s jump is his gravitational potential energy the greatest?

• At the start of the jump

• At the peak of the jump

• During the descent

• Upon landing

Tags

NGSS.MS-PS3-2

Circle the letter of the type of energy that increases as the pole bends before it propels a pole-vaulter up into the air.

• kinetic energy

• mechanical energy

• frictional force

• elastic potential energy