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Energy Unit Review and Assessment

Day 5 of 5 — Conservation, Summary, and Review

            📚 Science
                            🎓 Grade 5, 6
                                        ⏱️ 45 minutes
                    

Learning Objectives

Apply the law of conservation of energy to explain energy transformations in real-world systems
Synthesize knowledge of energy forms, transfer methods, and materials to solve problems
Demonstrate comprehensive understanding of the Energy unit through a review assessment

            Progress
            4 sections
        

1
Conservation of Energy
                            ~5 minutes                        

The Big Idea: Conservation of Energy

This week, we have explored many forms of energy, how energy transfers and transforms, and how materials affect energy flow. Today, we bring it all together with the most important principle in the entire unit: the law of conservation of energy.

This law states that energy cannot be created or destroyed. It can only change form or transfer from one object to another. The total energy in a closed system always remains constant. When we say something 'uses' energy, what we really mean is that it transforms energy from a useful form into less useful forms (usually thermal energy dispersed into the environment).

2
Check Your Understanding: Conservation
                            ~5 minutes                        

Question 1

A wind turbine converts the kinetic energy of moving air into electrical energy. According to the law of conservation of energy, what can we say about this process?

New energy is being created by the turbine
The kinetic energy of the wind is transformed into electrical energy; no energy is created or destroyed
Energy is destroyed when the wind slows down
The turbine produces more energy than the wind provides

Question 2

A pendulum gradually swings less and less until it stops. Where did the mechanical energy go?

It was destroyed
It was transformed into thermal energy (friction at the pivot and air resistance) and sound
It went back into the pendulum's weight
Gravity absorbed it

Question 3

When a battery dies, the energy inside it has been destroyed.

3
Unit Concept Map Review
                            ~5 minutes                        

Energy Unit Concept Map

                Energy Unit Concept MapComplete concept map linking all unit topics: forms, transfer methods, materials, and conservation law.Energy Unit: Concept MapENERGYKinetic EnergyPotential EnergyThermalSoundMechanicalChemicalGravitationalElasticEnergy Transfers By...Conduction(particle contact)Convection(fluid movement)Radiation(electromagnetic waves)Materials Affect Transfer...Conductors (allow flow)Insulators (resist flow)Law of Conservation: Energy cannot be created or destroyed            
A large concept map summarizing the entire energy unit. At the top center is the word ENERGY. Two branches go down: left branch leads to Kinetic Energy (energy of motion) with sub-branches for thermal...

                💡
                Week in Review            

Monday: Energy is the ability to do work; kinetic vs. potential; six major forms. Tuesday: Deep dive into thermal, light, sound, electrical, chemical, and mechanical energy. Wednesday: Heat transfers by conduction (contact), convection (fluid), and radiation (waves); expansion and contraction. Thursday: Conductors allow energy flow; insulators resist it; circuits need a complete loop. Friday (today): Conservation of energy ties everything together.

4
Unit Assessment
                            ~25 minutes                        

Question 4

Heat from a campfire reaches you in three ways. Which answer correctly identifies ALL three?

Conduction through the ground, convection through rising hot air, radiation through infrared waves
Only radiation and conduction
Only convection
Light energy, sound energy, and thermal energy

Question 5

Why are double-pane windows better insulators than single-pane windows?

Two panes of glass block more light
The trapped air between the panes acts as an insulator, reducing conduction
Double panes generate heat between them
Glass is a better conductor when doubled

Question 6

A student touches a metal desk and a wooden desk in the same room. The metal feels colder. Why?

The metal desk is actually at a lower temperature than the wooden desk
Metal is a better conductor and transfers heat away from your hand more quickly, making it feel colder
Wood generates heat
Metal absorbs cold from the air

Question 7

Match each scenario to the PRIMARY method of heat transfer involved:

Stirring soup with a metal spoon and the handle gets hot

Warm air from a heater rising to the ceiling

Feeling warmth from the sun on your face

Question 8

Which of the following correctly orders energy forms from a car engine?

Chemical energy in fuel transforms into mechanical energy of the wheels, thermal energy of the engine, and sound energy of the exhaust
Electrical energy transforms into light energy and thermal energy
Mechanical energy is created from nothing inside the engine
Nuclear energy in fuel transforms into thermal energy only

Question 9

A student builds a circuit with a battery, wires, and a light bulb, but uses a piece of string instead of wire for one connection. The bulb does not light. Why?

The battery is dead
String is an insulator and does not conduct electricity, so the circuit is incomplete
The bulb is broken
String conducts electricity but not enough to light a bulb

Question 10

Place the following events in the correct order as a ball rolls down a hill and comes to a stop at the bottom:

                        ⋮⋮
                        Ball slows and stops: kinetic energy transforms into thermal energy (friction) and sound
                    
                        ⋮⋮
                        Ball begins to roll: potential energy converts to kinetic energy
                    
                        ⋮⋮
                        Ball sits at the top of the hill with maximum gravitational potential energy
                    
                        ⋮⋮
                        Ball reaches maximum speed at the bottom: mostly kinetic energy

Drag items to reorder, then confirm

Question 11

Write a short response explaining how the law of conservation of energy applies to a specific real-world system of your choice. Your system should involve at least TWO energy transformations and at least ONE method of energy transfer (conduction, convection, or radiation). Be specific about which forms of energy are involved and how they transform or transfer.

Expected length: 100-300 words

Your Score