Thermal energy moving from a higher temperature to a lower temperature object is called
What is Heat
100
Difference between thermal energy and temperature?
What is
Thermal- depends on mass, temp, and phase of object
Temperature- does not depend on mass
Temperature is a measurement of thermal energy
100
Equation for speed, work, power, and acceleration
Total distance/total time
Force*Distance
Work/time
Velocity Final - Velocity Initiate/time
100
When does a ball dropping have the highest KE and highest PE?
What is KE: right before the ball is about to hit the ground
PE: At the balls highest point
100
Diff. between mass and weight
What is
mass-measure of inertia in an object
weight- measure of force of gravity acting on an object
200
What factors affect the gravitational attraction between 2 objects?
What is distance and mass
200
visible white light can be refracted by a _____ into different colors that have different _____.
What is prism and wavelengths
200
Work is the transfer of ____ on an object
What is energy
200
2 ways to decrease the acceleration of an object
What is reduce objects mass, and decrease force applied
200
What 3 things are necessary to have an electrical circuit/
What is wire, resistor, powersource
300
Mechanical waves are created by ______
What is vibrations
300
How is a projectile different from objects in free fall?
What is free fall objects are under influence of gravity
300
What is the law of conservation of energy? What was Einstein's amendment to this law?
What is that energy cannot be created or destroyed. Einstein said that mass and energy are equivalent and can be converted into each other.
300
What is a wave?
What is a disturbance in matter
300
Speed of an electromagnetic wave?
What is 3*10 to the 8th
400
a mirage is an image of a distant object caused by the __ of light
What is reflection
400
what are 6 simple machines?
What is lever, wheel and axle, inclined plane, wedges, screws, and pulleys
400
3 ways machines change work
What is
Change size of force needed
direction of force
distance over which a force acts
400
What is buoyancy and what direction does it act?
What is upward force an object feels from the water and compared to weight
400
What are the fossil fuels, how are they formed, and where do they get their energy from?
What is Coal-in ancient swamps
Natural gas- remains of marine organisms
Petroleum- remains of marine organisms
The Sun
500
What are the types of energy and describe them. (10)
Kinetic-energy of motion
Potential-energy stored as result of position or shape
Gravitational potential-potential energy that depends on objects height
Elastic-potential energy of object that's stretched or compressed
Mechanical-energy associated with motion and position of everyday objects.
Thermal-Total potential and kinetic energy related to all motion in particles
Chemical- energy stored in chemical bonds.
Electrical- energy associated with electrical charges
Electromagnetic- form of energy that travels through space in waves
Nuclear-energy associated in atomic nuclei
500
Identify an ex. of all types of energy (10)
Kinetic-running, ball rolling
Potential- playing cello
Gravitational potential energy-putting paper on high shelf
Elastic-stretching rubber band
Mechanical- speeding trains, bouncing balls
Thermal-Heater
Chemical- burning wood (to make smores)
Electrical- Batteries
Electromagnetic- X-rays
Nuclear- Heat+ light of sun
500
Identify and describe the types of renewable energy
What is
Hydroelectric- energy obtained from flowing water
Solar- sunlight that is converted into usable energy
Geothermal- thermal energy beneath Earth's surface
Biomass- chemical energy stored in living things
Hydrogen fuel cell- reacting hydrogen with oxygen generates energy
500
3 ways heat can transfer, describe, and give example
What is
Conduction-transfer of thermal energy w/no overall transfer of matter. EX: Touching something hot
Convection- transfer of thermal energy when particles of a fluid move from one place to another EX: boiling water
Radiation- transfer of energy by waves moving through space. EX-sunlight warming a rock
500
4 types of friction and ex of each
What is
Static-taking a step
Rolling- rolling a ball
Fluid- airplane flying
Sliding- sliding coin across table