Energy and Simple Machines Flashcards
What is thermal energy?
If Na’im climbed a mountain and started to sweat, his body would produce thermal energy as he wiped the sweat from his forehead.
What is radiant energy?
Comes from the sun.
How energy is transferred in a remote control car that uses batteries.
Chemical energy in the battery is being converted to mechanical energy in the wheels.
Newton discovered three laws to describe what?
Forces and motion.
Newton’s third law of motion describes that for every action, there is a what?
Reaction.
You are riding on a sled and the sled suddenly stops and you fly forward.
Law #1
You try to push open a heavy door while you are on rollerblades but you roll backward.
Law#3
Sliding a big box up a ramp in harder than slicing a small box.
Law #2
It takes less force to push an empty grocery cart than a full grocery cart.
Law #3
You put your milkshake on the dashboard of your mom’s car but when he car suddenly stops, the drink flies off.
Law #1
Touching a metal spoon inside of a boiling pot of soup is an example of what?
Conduction
Conduction, convection, and radiation are all ways that
Thermal energy can be transferred
Energy can be transferred from a warmer object to a cooler object causing both to reach
thermal equilibrium
If the flame from a stove is heating up soup in a pan, this would be an example of
Radiation
If soup is heated up and the soup at the bottom heats up first and rises to the top of the pan and then sinks back down, this would be an example of
Convection
If two motorcycles are riding at the same speed of 30mph, their velocities are different, explain why
Velocity is direction - they are both going 30 mph but are traveling in different directions
If the temperature in your living room is 80 degrees in the summer, while in the attic the temperature is 90 degrees, explain why the attic is hotter than in your living room?
Convection - warm air rises, while cold air sinks
What is motion?
Can be described and measured by position, speed, velocity and acceleration.
The _______ of a race car can be found by measuring how far it moved in a certain time.
Speed
Turning left or right, speeding up or down describes the race car’s ___________
Acceleration
If a race car reaches a top speed of 175mph moving south along a track, this describes the race cars ___________
Velocity
Explain why most of our pots and pans have wood or plastic handles?
Plastic and wood are insulators so you won’t burn your hand unlike metal which will conduct heat/energy
Name some insulators
Glass, cork, plastic forks, cotton sheets and a wool scarf.
Name some conductors
Copper penny, a gold ring, an aluminum can.
A ________ is a simple machine that has an arm that pivots on a point called a fulcrum
Lever
The ___________ is the amount that a machine makes work easier
Mechanical Advantage
A _________ consists of a rope wound around a wheel and can make lifting easer
Pulley
A _________ is a simple machine that is made up of many levers and rotates on a shaft.
Wheel and axel
___________ occurs between any two substances.
Friction
An _____________ is a sloping surface used to move objects from one level to another.
Incline plane
All forms of energy can be described as forms of _________.
Potential and Kinetic energy
If Na’im hikes up a mountain, as he climbs higher and higher he gains_____________
potential energy
In Na’im ate breakfast before he climbs a mountain, his body would change the
(a)_________ found in his food to (b) ________ so he could climb higher and higher.
(a) chemical energy
(b) mechanical energy
