Energy, Work, Machines, Simple Machines

Question 1

_______ stored energy due to position

Answer 1

potential energy

Question 2

_______ is energy stored in food and fuels

Answer 2

chemical potential energy

Question 3

_______ is energy stored by things above Earth

Answer 3

gravitational potential energy

Question 4

_______ is the ability to cause change

Answer 4

energy

Question 5

_______ is energy in the form of motion

Answer 5

kinetic energy

Question 6

_______ is energy stored by things that stretch

Answer 6

elastic potential energy

Question 7

the amount of energy a moving object has depends on the _______ and its ______

Answer 7

mass and velocity

Question 8

the sun gives off what two forms of energy?

Answer 8

radiant and thermal

Question 9

what is the formula for work?

Answer 9

work= distance x force

Question 10

what is the formula for power?

Answer 10

power= work/distance

Question 11

An electric blanket warms you on a cold evening. How did energy change form?

Answer 11

electric -> thermal

Question 12

A pile of logs is burned for a campfire. How did energy change form?

Answer 12

chemical potential energy -> light and thermal energy

Question 13

Your car seat is hot after sitting outside in the sun all day. How did energy change form?

Answer 13

potential energy -> thermal energy

Question 14

You eat an orange during half-time during a soccer game How did energy change form?

Answer 14

potential energy -> chemical potential energy

Question 15

what is the difference between input and output force?

Answer 15

input force is force applied to a machine and output force is force applied by a machine

Question 16

what are two ways machines make work easier?

Answer 16

fixed pulley and moveable pulley

Question 17

how can machines be made more efficient?

Answer 17

by reducing friction

Question 18

How does using a ramp put items in a truck make work easier?

Answer 18

it reduces the amount of force required to do work

Question 19

An inclined plane wrapped around a cylindrical post is a(n) _________________

Answer 19

screw

Question 20

A winding mountain road is an example of a(n)____________

Answer 20

lever

Question 21

When two or more simple machines work together, they are called a(n) ______________

Answer 21

compound machine

Question 22

A system of pulleys is called _______________

Answer 22

block and tackle

Question 23

The Law of Conservation of Energy states that ___________________

Answer 23

energy may change form, but cannot be destroyed or created under ordinary conditions

Question 24

Marquis is standing with his back towards a campfire, He notices that his back is much warmer than his chest. He knows the heat energy is being transferred from the fire and this method of energy transfer can happen even if no air is present. This method of heat energy is _________________

Answer 24

thermal energy

Question 25

When you hold an ice cube in your hand, it feels cold because _____________

Answer 25

the heat from our hand transfers to the ice cube (idk)

Question 26

The main method of heat transfer that occurs in water is called ___________________

Answer 26

convection

Question 27

If a copper wire with a wooden handle being held over a flame what will most likely happen after a couple of minutes?

Answer 27

it would heat the wire

Question 28

The direct transfer of heat from one substance to another substance that is touching is _________________

Answer 28

conduction

Question 29

How do you know when the transfer of thermal energy has ended?

Answer 29

when it cools down

Question 30

During the day, sand at the beach is very warm. At night, the sand is cooler. Why does this occur?

Answer 30

the sun gives off thermal energy

Question 31

When you use a flashlight, you produce light and ___________ energy.

Answer 31

radiant energy

Question 32

Swinging a baseball bat is an example of a ____________ lever.

Answer 32

3rd class lever

Question 33

How does using a hammer to nail boards together make work easier?

Answer 33

it increases the force from the hammer and applies it to the nail