Chapter 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 converted into the ____________________ of the toy's moving parts

• gravitational potential energy

• kinetic energy

• operational energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

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 in a single step.

• false

• true

Tags

NGSS.MS-PS1-4

Is the following sentence true or false? Energy can be created but not destroyed.

• false

• true

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.

• false

• true

Tags

NGSS.MS-PS3-5

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

• thermal energy

• potential energy

• chemical energy

• light energy

Tags

NGSS.MS-PS3-5

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

• kinetic energy

• thermal energy

• gravitational energy

Select the options that are 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-PS3-2

NGSS.MS-PS3-5

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

• kinetic energy

• frictional force

• mechanical energy

• elastic potential energy

Is the following sentence true or false? For a mechanical change in an isolated system, the mechanical energy at the beginning equals the mechanical energy at the end of the process, as long as friction is negligible

• true

• false