Vocabulary
Energy
Motion & Forces
Composition of Matter
Atoms and Elements
States of Matter & Laws
100
What is the definition of weight?
The pull of gravity on an object.
100
At what position does the boulder have the greatest potential energy?
Position A
100
What are Newton's three laws of motion?
1. An object at rest will stay at rest unless unbalanced forces act on it.
2. Force = mass x acceleration
3. Every action has an equal and opposite reaction.
100
Is mixing spices together for pizza sauce an example of a chemical change?
No, it is an example of a physical change.
100
What is an element?
Pure chemical substances containing only one type of atom
100
Will an object that has a density of 5 g/cm3 sink or float in water that has a density of 1 g/cm3?
It will sink because it is more dense than the water.
200
What is the definition of mass?
The amount of matter in an object.
200
At what position does the boulder have the greatest kinetic energy?
Position B
200
Use Newton's second law to calculate how much force would be necessary to move a 200 kg object with an acceleration of 4 m/s2
800 N
200
What does the law of conservation of mass say?
Matter can not be created or destroyed, it can only be transformed.
200
What is the smallest unit of an element that still maintains its characteristics?
An atom
200
Changes of state are examples of ___________ changes.
physical
300
What is the definition of volume?
The amount of space an object takes up
300
When you plug a hair curler into an outlet, what energy conversion occurs?
Electrical --> thermal
300
What was the average speed of the beetle from 14 minutes to 16 minutes?
4 cm/minute
300
What is the difference between a compound and a mixture?
A compound is when two elements combine chemically. A mixture is when multiple compounds or elements combine physically.
300
What are the three subatomic particles that make up elements? What are their charges?
Proton: +
Electron: -
Neutron: neutral
300
The liquid in a thermometer rises when the temperature increases. This is because the particles in the liquid...
Move faster and spread apart
400
What is density?
How tightly matter is packed within a given space. =mass/volume
400
What does the law of conservation of energy state?
Energy can not be created or destroyed, only transformed into other forms.
400
What is the velocity of the beetle from time 6 minutes to 14 minutes?
0 cm/min
400
Name two characteristic properties of any substance (properties that never change)
melting point, boiling point, density
400
What do the rows and columns on the periodic table tell you?
Row: number of electron rings
Column: number of valence electrons
400
As temperature increases, the rate of motion of molecules ___________
Increases
500
What is the definition of inertia?
The tendency to remain in motion
500
What is an example of one source of nonrenewable energy? What is an example of one source of renewable energy?
Nonrenewable energy examples: coal, oil, gas
Renewable energy examples: solar energy (solar panels), wind energy (turbines), hydroelectric power (dams)
500
As two objects get closer, the gravitational force between them ______________.
increases
500
Which diagram represents a mixture?
Diagram Z
500
What is the atomic number of oxygen? What is the atomic mass? How many valence electrons does oxygen have?
atomic number = 8
atomic mass = 15.999
valence electrons= 6
500
Why does hot air rise?
It is less dense than cold air.