Law of Conservation of Energy-Student Presentation 2025

Presentation

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Science

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6th - 8th Grade

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Practice Problem

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Hard

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NGSS

MS-PS3-5, MS-PS3-4, MS-PS3-2

Standards-aligned

Yesenia Colon Irizarry

FREE Resource

21 Slides • 28 Questions

Multiple Choice

The equation Energy_initial = Energy_final is a representation of which scientific law?

Law of Conservation of Energy

Newton's First Law

Law of Universal Gravitation

Law of Conservation of Mass

Fill in the Blanks

Multiple Choice

Which of the following statements best describes an isolated system in the context of energy conservation?

A system where energy and matter cannot enter or leave.

A system where only energy can enter or leave.

A system where only matter can enter or leave.

A system where both energy and matter can enter or leave.

Open Ended

Explain what happens to energy in open and closed systems when it is not conserved within the system.

Type response here

Open Ended

Describe a real-life example where the law of conservation of energy can be observed, and explain how energy is transformed in that example.

Type response here

Multiple Select

Which of the following are components of mechanical energy?

Kinetic energy

Potential energy

Thermal energy

Chemical energy

Multiple Choice

Which of the following is an example of energy transformation from chemical to motion energy?

A person riding a bicycle after eating food

A solar panel charging a battery

A lamp lighting up from electricity

A dam generating electricity

https://florida.pbslearningmedia.org/resource/hew06.sci.phys.maf.rollercoaster/energy-in-a-roller-coaster-ride/

Multiple Select

Which of the following statements about the changes between kinetic and potential energy in a roller coaster is/are correct?

At the highest point, potential energy is maximum and kinetic energy is minimum.

At the lowest point, kinetic energy is maximum and potential energy is minimum.

Mechanical energy is not conserved throughout the ride.

Kinetic and potential energy are always equal at every point.

Multiple Choice

Why does the sum of kinetic energy and potential energy never exceed the initial mechanical energy in a roller coaster system?

Because energy is lost as heat

Because energy is created during the ride

Because energy is conserved and only transformed between forms

Because friction increases energy

https://phet.colorado.edu/en/simulations/pendulum-lab

Fill in the Blanks

Open Ended

Explain how the conservation of energy applies to a water dam (reservoir), using the different labels to explain the transitions.

Type response here

Multiple Choice

At which position on the roller coaster does the cart have maximum kinetic energy?

At the top of the first hill

At the lowest point of the track

Halfway down the first hill

At the end of the track

Fill in the Blanks

Answer the following questions to the best of your ability. This is part of your grade!

Multiple Choice

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

Chemical to light

Electrical to chemical

Electrical to light

Chemical to electrical

Multiple Choice

The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —

solar

light

thermal

mechanical

Multiple Choice

In the absence of air resistance, what can be said about the total mechanical energy of a system?

Remains constant

Becomes zero at some point

Increases over time

Decreases over time

Multiple Choice

What is the relationship between potential energy and kinetic energy in a system?

Potential energy is always greater than kinetic energy

Potential energy and kinetic energy are completely unrelated

Kinetic energy can never be converted into potential energy

Potential energy can be converted into kinetic energy and vice versa

Multiple Choice

What is Mechanical Energy a sum of?

Kinetic Energy and Thermal Energy

Potential Energy and Chemical Energy

Kinetic Energy and Potential Energy

Thermal Energy and Chemical Energy

Multiple Choice

True or False

The total energy in an isolated system can be increased.

true

false

Fill in the Blanks

Type answer...

Multiple Choice

A ball is suspended by a lightweight string, as shown in the figure. The ball is displaced to position 1 and released. The four labelled positions are evenly spaced along the arc of the ball's motion.
Between which adjacent pairs is the gain in kinetic energy the greatest?

1 and 2

2 and 3

3 and 4

They are all equal

Multiple Choice

The law of conservation states that

every action has an equal and opposite reaction

all matter has thermal energy

energy cannot be created or destroyed, only changes form

heat moves from an object of higher temperature to an object of lower temperature

Multiple Choice

An acorn falls from a tree. Compare its kinetic energy KE to its gravitational potential energy PE.

KE increases and PE decreases

KE decreases and PE decreases

KE increases and PE increases

KE decreases and PE increases

cannot be determined

Multiple Choice

Mechanical energy can be either potential or ________.

Motion

Kinetic

Chemical

Light

Multiple Choice

Which of the following devices directly transforms radiant energy into electrical energy?

Solar panel

Battery

Lamp

Wind turbine

Multiple Select

Which of the following are forms of energy produced in the city as a result of the reservoir system?

Heat

Light

Mechanical Energy

Sound

Multiple Choice

When electricity flows through a light bulb, which forms of energy are produced?

Only light energy

Only heat energy

Both light and heat energy

No energy is produced

Fill in the Blanks

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