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How The World Works Test
Flashcards for How The World Works Test
25
Science
6th Grade
02/28/2016

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Cards

Term
Define Matter
Definition
It is everything in the world around. Must have mass and volume.
Term
What is matter made of?
Definition
atoms and molecules
Term
Describe an atom
Definition
It is the smallest particle of an elements that has the same properties of element.
Term
Atoms are made up of...
Definition
protons, neutrons and electrons.
Term
What is mass?
Definition
The amount of matter in an object.
Term
What are elements?
Definition
An element is a substance that cannot be broken down into anything simpler.
Term
How many elements are there?
Definition
112 pure elements
Term
All matter in the world is made up of...
Definition
elements
Term
What are molecules?
Definition
They are tightly bound atoms that act like a single particle.
Term
What are compounds?
Definition
A chemical combination of elements. Example is salt = NaCI.
Term
What are the properties of elements?
Definition

Elements is:

  • one type of atom
  • can be solids, liquids or gases
  • Can be mixed together in the air (like oxygen)
Term
What are properties of compounds are?
Definition
when elements are chemically mixed together.
Term
What are the two categories of energy?
Definition
kinetic and potential
Term
What is kinetic energy?
Definition
The energy of a moving object
Term
Can energy be destoyed or created?
Definition
No, it can only be changed.
Term
What is energy?
Definition
The ability to move other matter around.
Term
Kinetic energy turns into ___________ energy.
Definition
potential
Term
What is potential energy?
Definition
It is energy that is stored.
Term
What is a way to give an object potential energy?
Definition
Move it upward against gravity.
Term
How is energy measured?
Definition
In joules
Term
How do you describe an object's speed?
Definition

Speed is how fast an oject's position changes with time at any given moment.

 

Term
What is the formula for an objects speed?
Definition

Speed = distance

_________

time

Term
What is Newton's first law?
Definition
An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same direction and speed unless an unblanaced force acts on it.
Term
What is Newton's Second law?
Definition
Acceleration is produced when a force acts on a mass. The greater the mass the greater the amount of force needed.
Term
What is Newton's third law
Definition
for every action (or force) there is an equal and opposite reaction (force)
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