Energy & Work
Energy is the ability to cause change in the ________ of an object.
motion or position
The energy of objects in motion is called __________ energy.
kinetic energy
The kinetic energy of an object depends on its ______ and ________.
mass and speed
A microwave changes ________ energy into radiant energy.
electrical
Energy due to the motion of particles that make up an object is ______________.
thermal
When work is done, energy is created, destroyed, or transferred?
transferred
Potential energy is _________ energy.
stored
The gravitational potential energy of an object depends on its weight and ___________.
height
A gas stove transforms the chemical energy in natural gas into ________ energy.
thermal
Energy stored in the objects that are compressed or stretched is ________________.
Elastic Potential Energy
_____________ is the transfer of energy that occurs when a force is applied over a distance.
Work
The energy in electromagnetic waves is ________ energy.
radiant/light
Which scenario describes a student doing work:
Standing still and holding a bag
Lifting a box to the top of a shelf
Lifting a box. (force in a direction = work).
A battery transforms chemical energy into ___________ energy.
electrical
Energy released in the nucleus of an atom is ________________.
nuclear energy
Due to ___________, when surfaces rub together, some mechanical energy always transfroms to thermal energy.
friction
A system of object's ____________ energy is the total of its kinetic energy and potential energy.
mechanical
Which has more kinetic energy:
A 5lb bowling ball moving 2 mph or a 5lb bowling ball moving 1 mph?
2mph (more speed)
A radio transforms radiant energy into ____________ energy.
Sound
Energy stored in the bonds between atoms is _________________.
chemical energy
Long Answer: Restate the Law of Conservation of Energy in your own words.
Energy can be transfered, or transformed, but can never be created or destroyed.
Long Answer: Name the force that resists a bicycle's movement when you apply brakes and explain how it transforms energy.
Friction resists the motion of the bicycle. Friction transforms mechanical energy into thermal energy.
Which has more potential energy:
a feather or book sitting on the same shelf of a bookcase?
the book (more mass)
Long Answer: Describe the energy change that allows your body to use food for warmth and movement.
Our body's break down the chemical energy in food molecules and transform it into thermal energy and mechanical energy.
Long Answer: Write a paragraph that explains waste energy. Then relate the amount and tyoe of energy before and after an energy transformation.
Waste energy is thermal energy released when energy transforms from one type to another that can't be reused. The energy before the transformation is always EQUAL to the energy after a transformation.