Matter
A ___________ reaction happens when elements are combined or rearranged.
chemical
How many laws of motion are there?
3 laws of motion
How do we measure work?
work=force x distance or in joules
What instrument do we use to measure heat?
thermometer
What is Newton's first law of motion?
An object in motion, stays in motion, an object at rest, stays at rest.
When substances are mixed together but NO reaction happens, this is called a ___________.
mixture
_________________ is when an object SPEEDS up.
Acceleration
What is the difference between kinetic and potential energy?
Kinetic is energy in motion; potential is stored energy, not in motion, but can if a force acts on it
Give an example how heat can cause matter to change from solid to a liquid or a gas.
ice cube to water to water vapor
What is Newton's second law of motion?
The amount of force needed to move an object depends on the mass; the larger the object, the more force needed
When something _____________ into something else, it looks like it disappears, but it is really still in there.
Ex: salt in water
dissolves
_____________________ is when an object SLOWS down.
deceleration
How does a generator work?
A generator turns chemical energy into electrical and mechanical energy.
Give one example of a heat source.
chemical, electrical, radiant, nuclear,
What is Newton's 3rd law of motion?
For every action there is an equal and opposite reaction.
When you mix salt in water, __________ is the solute because it dissolves.
salt
___________ is the force that causes objects to fall to the ground.
gravity
What is the law of conservation of energy?
Energy CANNOT be created NOR destroyed
What is evaporation?
When a liquid turns into a gas.
What degrees Fahrenheit does water boil?
212 degrees Fahrenheit
HCL + NaOH ------makes NACL + H2O
Which are the reactants and which are the products?
reactants-HCL and NaOH
products-NACL and H2O
What is Newton's first law of motion?
An object in motion......
An object at rest.....
An object in motion, stays in motion.
An object at rest, stays at rest.
Give an example of a 2 simple machines.
lever, pulley, screw, inclined plane, wheel and axle, wedge
What is condensation?
When a gas turns back into a liquid
What is the difference between conduction, convection, and radiation?
Conduction happens when a object touches a hot object, convection is when warm air moves, and radiation is when heat moves from the sun or a warm object