Matter
Atoms & Periodic Table
Energy
Energy Transformations
Fun!
100
What is made of only 1 type of atom and is a pure substance?
Element
100
On the periodic table, elements are arranged by their ___________________.
Atomic Number
100
What 2 factors determine how much kinetic energy is in an object?
Mass and speed
100
What energy transformations are taking place?
Burning match
chemical -> thermal, light
100
What is the formula for density?
D = m/v
200
Matter is anything that has _________ and _____________.
Mass and Volume (takes up space)
200
What identifies an element on the periodic table?
Atomic number
200
What 2 factors determine how much potential energy in an object?
Mass and position
200
What energy transformations are taking place?
Radio
Electrical - > sound
200
Objects that are ______ dense than water will float.
Less
300
Matter can be divided into 2 groups... what are those groups?
Pure substances and mixtures
300
Why do atoms have no electrical charge?
They have equal numbers of protons and electrons.
300
Energy transformations always create unwanted ___________ because of friction.
Forms of energy
300
What energy transformations are taking place?
Walking
Chemical -> kinetic
300
Objects that are more dense than water will _____.
Sink
400
What are the 2 types of pure substances?
Elements and compounds
400
The left side of a chemical equation is called the __________ and the right side of a chemical equation is called the ___________.
Reactants; Products
400
What type of energy is at the top of the first hill of a roller coaster?
Potential energy
400
What energy transformations are taking place?
Battery powered flashlight
Chemical -> light
400
Water is the only substance that becomes ______ dense when it changes from a liquid to a solid.
Less
500
What is the change called from a solid to a gas?
Sublimation
500
Count the atoms in 2KNO2
K = 2
N = 2
O = 4
500
What type of energy is shown as the car goes down the first hill?
Kinetic energy
500
What is mechanical energy?
Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work.
500
State the Law of Conservation of Energy.
Energy cannot be created or destroyed; it can only be changed from 1 type of energy to another