HHE: KE, PE, Convert, Transfer

HHE: KE, PE, Convert, Transfer

The Scenario

The problem that we are trying to solve for this unit is how to get energy to the batteries in the rescue workers' electrical devices, even when power is out.

Multiple Choice

Systems and system models is a cross-cutting concept that we are discussing in this unit.

Multiple Choice

Throughout this unit, we are working as Student Energy to learn about some energy systems and what makes things work the way they do. So far, we have learned how to recognize Kinetic and Potential energy. Is this a True or False statement?

Multiple Choice

Everything is able to move or change WITHOUT energy.

Multiple Choice

Whenever something moves or changes, it is because of energy.

Multiple Choice

Scientists make scientific arguments using:

• data, reports, and observations

• explanations, systems, models

• claims, evidence, reasoning

• observation of changes and results of experiments

Converting between Potential & Kinetic Energy

-Watch '9-21-20 Potential vs. Kinetic Energy at Poulsbo Pump Track'

-The videos are in the "Daily Videos w/ Manuguid" tab in the General & Daily Directions channels

Multiple Choice

When something has the ability to make things move or change in the future, it has __________ energy, even if it is not moving or changing now.

• potential

• kinetic

• elastic

• gravitational

Multiple Choice

When something is moving, it has _________ energy.

• potential

• kinetic

• elastic

• gravitational

Multiple Select

In the article titled "Energy Inventions" the sources of energy that were used in the Sun Lamp & Flashlight were:

• Energy from the sun

• Energy from the human body

• Energy from an hydroelectric dam

• Energy from methane gas collected from cow manure decomposing

• Energy from wind turbines

Light Energy

Light doesn’t fit in the potential energy category or the kinetic energy category.

We need a new category for light energy. 

Light Energy

• Light isn’t really a moving object, and it isn’t stored energy like the energy in a battery. Light is energy, however, so we need a new energy category for light.

• This category represents the light itself, not the objects that provide the light (the sun and the flashlight).

We have a new message from Morgan Lewis from the Energy Research Lab. He will explain what we will do next.   

Open Ended

What ideas do you have about how rescue workers can get energy to their electrical devices in these situations?

How to get energy

• We know that rescue workers need devices such as flashlights, walkie-talkies and phones. We also know that in an emergency it is crucial that these devices don’t run out of energy.

• Rescue workers often find themselves in situations where they can’t plug in their devices to recharge them with energy. They need to have energy sources that keep their devices working for a long time.  

How Objects Get Energy

We have learned that objects get energy from other objects that have energy.

Here is an example of a system where the light gets energy from other objects

Multiple Choice

How is the LIGHT getting its energy in this system?

Here were the order of the objects:

Fuel -> Engine -> Generator -> Light

• In the system we’ve been thinking about,

  ●the engine gets energy from the fuel,

  ●the generator gets energy from the engine,

  ●and the light gets energy from the generator.

  The light turns on because it gets energy from the objects in this system. 

Generator

a machine that can CONVERT, or change, kinetic energy into electrical energy

Multiple Choice

Energy can be converted from one type of energy to another.

Multiple Choice

If energy is MOVING from one place like a battery to another place like a light bulb, we can replace the word "MOVING" with:

• converting

• transferring

Multiple Choice

Energy from the human body can be converted into electrical energy that can be stored in a battery.

Multiple Choice

A generator is a machine that can:

• CONVERT kinetic energy into electrical energy.

• TRANSFER kinetic energy into electrical energy

Claims

• Scientists make claims to answer their questions.

  
  

  Here are two claims that have been made to answer our Investigation Question “How to objects get energy.” 

• Claim 1: Objects make their own energy. 

• ●Claim 2: Objects get energy from other objects that have energy.

Claims

In addition, we already learned that in a system objects don’t make their own energy; they get their energy from other objects. This also supports Claim 2. 

Claims

Claim 1 is not supported by any evidence. 

A light does not make energy to turn itself on. 

Multiple Choice

Energy from the human body can be converted into electrical energy that can be stored in a battery.