Energy 1
Define energy
the ability to do work
This is the abbreviation for kinetic energy.
K.E
The biggest source of light energy for Earth
sun
Energy possessed by a drop of water about to fall from the top of a waterfall.
Potential energy
ehat
heat
What are the two other names for light energy?
Radiant and Electromagnetic
What is energy in motion?
kinetic energy or mechanical energy
Energy cannot be lost or destroyed, only transformed into a different form of energy. True or False
True
What are three ways heat can be transferred?
conduction, convection, and radiation
Potential energy associated with objects that can be compressed.
Elastic potential energy
AHMRTEL
thermal
This form of energy is the ability to fall.
Gravitational
Type(s) of energy used by an oven use to bake cakes.
What is the energy transformation?
______ to ______ to ________ (food)
Electric energy to heat / thermal energy to chemical
A hair dryer transforms _______energy to _____ and ________
electrical, heat and sound
True or false: Energy is anything that has mass and takes up space.
False. The answer is matter.
What is the SI Unit of heat?
Joules
TEPLTIOAN
potential
What is nonrenewable energy?
Non-renewable energy comes from sources that will run out or will not be replenished in our lifetimes.
What energy transfer occurs in a hot air balloon?
Chemical --> thermal --> kinetic
What is the energy transformation when you rub your hands together
kinetic/mechanical to thermal
If there is friction between 2 moving bodies, then mechanical energy is converted into............
heat or thermal energy
Both of these types of energy produce "waves" and are a part of our bodies' senses. Some examples are your tv and your phone.
light and sound
TECAICELLR
electrical
What are 3 major types of fossil fuels?
coal, oil, and natural gas
Define Electrical Energy
Energy that comes from electric potential or moving electric charges
Factors that potential energy depends on
hint: Things that make more PE.
1. __________ 2. ___________
mass and height
As a pendulum reaches its highest point, the energy is transferred from ______ to ______.
Potential to kinetic.
To calculate mechanical energy of a body what all must you add?
Its potential energy and kinetic energy
airtand
radiant
What are 3 of the 5 main types of renewable energy.
What makes an energy source renewable or non-rewable?
Renewable energy is derived from natural sources that are replenished at a higher rate than they are consumed. Nonrenewable will run out or not replenished in our lifetime.
sun - solar energy
water - hydroelectric ex: Hoover Dam
Wind - wind mills
Geothermal
Biomass
What type of energy transfer occurs in an electric car?
Electrical energy --> Chemical Energy --> Mechanical Energy
If you were to fall, this would increase as you fell.
kinetic energy
What are the three types of heat transfer?
Conduction - touching
Convection - density heat rises and cool sinks.
Radiation - heat from electromagnetic waves (microwaves, sun, campfire)
If you have a bowling bowl, basketball, and a tennis ball moving in the same speed, which ball have more kinetic energy? Why?
Bowling ball - it has more mass.
CINCLMAAHE
mechanical
How are fossil fuels created?
Many ways keep it simple:
Something living dies. It gets buried in sediment. Over time layers of rock cover the organic material (peat) then heat and pressure turn peat into fossil fuels.
What energy transfer occurs using a plugged phone?
chemical energy --> electrical energy --> sound energy --> radiant energy
Energy transformation needed for you to SEE a star
nuclear to electromagnetic or light
Give an example of an energy transformation that is from Electrical to Chemical.
Battery charger
Describe the energy transformation in a nuclear power plant.
a large nucleus is split (fission) with uranium producing heat / thermal energy. Thermal energy heats up water to create steam. The steam turns the turbine (MECHANICAL ENERGY). The turning of the turbine creates ELECTRICAL ENERGY in a generator. Electricity is given to power lines.
elicmahc
chemical
Why is burning fossil fuels bad for Earth?
It creates air pollution. They release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gasses trap heat in our atmosphere, causing global warming.
describe the energy transformation in a windmill?
The energy transformation in a windmill starts with kinetic energy (wind), which then turns into mechanical energy (fan blades and turbine) and is then converted into electrical energy (generator).
This form of energy is caused by object's vibrations that transmits energy through the air around it.
sound energy
Heat travels from _____________ to ____________
from hot to cool
Describe the energy transformation where a match is struck against a box and produces light and heat.
chemical to mechanical to radiant and thermal
TOOANFNAIMRSRT
transformation
What is the law of conservation of energy?
Energy cannot be created or destroyed. It just changes form.