Science 12.2

Most energy can be?

Transferred

When energy moves, we say it is?

Transferred

All forms of energy can be ? Into most other forms

Transformed

When energy changes from one kind into another kind we say it is,

Transformed

True or false. Energy is never lost in energy transfers.

True

True or false. Energy is never lost in energy transformations.

True

True or false. Musical instruments transform mechanical energy into sound energy.

True

Why is eating important to our bodies?

Because we need the chemical energy of food to be converted into Kinetic Energy when we are active. It is also converted into thermal energy to maintain body temperature.

When the skateboarder reaches the top of the half pipe, which of the following types of energy is at its maximum?

Potential energy

What energy transformation happens when object is falling?

Potential to kinetic

What energy is transferred by the motion?

kinetic

Which of the following types of energy from food is used to maintain body temperature?

Thermal energy

Name to common energy conversions that involve electrical energy.

Kinetic and thermal energy. Alarm clock and lightbulb

As the skateboarder speeds down to the bottom of the half pipe, which of the following types of energy is at its maximum?

Kinetic energy

When the rubber band on the airplane is released, the stored energy but comes what type of energy spinning the propeller?

Kinetic energy

When you are active chemical energy of food is converted into which of the following types of energy?

Kinetic energy

In all transfers and transformations, energy is never lost. This role is called?

Law of conservation of energy

Which of the following types of energy do plants use to make chemical energy?

Light energy

Solar cells transform what energy into what energy

Light into electrical

Green plants transform what energy into what energy

Light to chemical

Energy is never what in all transfers and transformations?

Lost

Work is made easier when a? Changes the direction or size of the force needed to do the work.

Machine

What can transfer energy and can convert energy into a more useful form?

Machines

What type of energy is transferred by moving a raised object to another place at the same level?

Mechanical potential energy

What is the use of light energy to make new substances that have chemical energy?

Photosynthesis

Elastic potential energy is another example of what type of energy?

Potential energy

Energy from the sun is measured using a?

Radiometer

What measures energy from the sun?

Radiometer

What is energy conversion?

A change from one form of energy to another

Give a non-example of energy conversion.

A cookie jar A soccer ball just sitting.

Give an example of energy conversion

A mug has gravitational potential energy while it's on the table. As the mug falls it's potential energy changes into Kinetic energy. This change is an example of an energy conversion. A person shooting and making a goal.

How is elastic potential energy stored and released?

A wound up rubber band has potential energy because it shape has been changed. When the rubber band is let go, the stored energy that comes Kinetic energy.

List some common energy conversions that involve electrical energy.

Alarm clock=light energy and sound energy Battery=Chemical energy to electrical energy Lightbulb=electrical energy to light and thermal energy Blender=Electrical energy to kinetic and sound energy

How are light and sound transferred?

By waves

What are two things that machines can do to the force that is put into them?

Changing the size or direction of the force needed to the work

In photosynthesis, light energy is changed into what type of energy?

Chemical energy

Which of the following types of energy comes from the food you eat?

Chemical energy

Plants change light energy into what type of energy? The chemical energy in the food you eat is changed into another kind of chemical energy that your body can? Your body then uses that energy to give you? Energy that use in everything you do. It's an endless process energy is always going?

Chemical energy Use Kinetic energy Somewhere

Animals transform what energy into what energy and what energy

Chemical into kinetic and thermal

Give an example of a transfer of energy that makes work easier by using a machine?

Cracking a walnut A bike using pedals Chemical energy in your body is converted into kinetic energy when your muscle fibers contract and relax. Your legs transfer this K Energy to the petals by pushing them around in a circle. The petals transfer this Kenergy to the gear will which transfers KEnergy to the chain. The chain moves and transfers energy to the back wheel which get you moving.

Hey stretched rubber band stores of what type of energy?

Elastic potential energy

Which of the following types of energy is present in the wound up rubber band and A toy airplane?

Elastic potential energy

Which of the following types of energy do you use to make toast?

Electrical energy

Give two examples of energy conversions that take place within a hair dryer.

Electrical energy is converted into thermal energy as a grid of wires heat up. The fan forces air out across the hot wires, and hot air blows out of the nozzle of the hairdryer. You can hear the sound energy that also comes out. Electricity enters the hairdryer and is converted into Kinetic energy as small electric motor spins a fan blade.

When the wires and In a hair dryer heat up which of the following types of energy changes take place?

Electrical energy to thermal energy

Light bulbs transform what energy into what energy and what energy

Electrical to light and thermal

All forms of energy can be transformed into

Electricity and then transferred through wires

True or false. Hydroelectric power plants transform electrical energy into mechanical potential energy.

False

True or false. Solar cells transform electrical energy into light energy.

False

Your body uses the food you eat to convert chemical energy into?

K energy

When riding a bike, your legs transfer what type of energy to the petals by pushing them around in circles?

Kinetic

When you eat food, you were taking an energy that first came from ?

Sun

Examples of the chain of energy transfers and transformations.

Sunlight is turned into thermal energy. This makes convection currents into the air. Warm moist air rises in the convection current. As the air rises against potential energy and forms raindrops. Some but not all of their potential energy changes to Connecticut Energy as they fall and run downhill into a dam. The remaining potential energy turns into kinetic energy and then into electricity. The electrical energy is transferred to your house there and light bulb transforms it into the light and heat

And I radiometer which vanes absorb the most light energy?

The black panels so were more sunlight.

Vacuum cleaner is a machine that uses electrical energy. What are three forms of energy that the electrical energy changes into in the backing cleaner?

Thermal energy Light energy Sound energy

What happens after the light is absorbed into the radiometer

The panel start moving in a circle around and around

Where does the chemical energy in the food we eat come from?

The sun

Energy is not lost, but some energy is always turned into a form? Give an example.

We cannot use, usually into heat. A lightbulb. Some of the electricity the bulb uses is always changed into heat that we didn't really want.

When is KEnergy converted to potential energy?

When an object is moved against gravity

How is the chemical energy from a tree converted into thermal energy?

When you burn the trees wood so if you follow the energy back far enough the energy from a wood fire actually comes from the sun

Are you taking in chemical energy from the sun when you eat meat from animals?

Yes because the animals eat plants which gets the chemical energy from the sun.