Matter Basics
Anything that has mass and takes up space
What is matter?
This is the smallest unit of an element.
What is an atom?
This term refers to the starting substances in a chemical reaction and is written on the left side of the arrow.
What are reactants?
These are the substances formed as a result of a chemical reaction, written on the right side of the arrow.
What are products?
When water changes from a liquid to a gas (water vapor), it’s an example of this kind of change/reaction.
What is a physical change?
In this state, particles are somewhat close together but can move past one another, and the matter takes the shape of its container.
What is a liquid?
A water molecule is made of this many atoms.
What is 3?
This happens to atoms during a chemical reaction.
What are rearranged to form new substances?
A molecule of methane (CH₄) contains this many hydrogen atoms.
What is 4?
The amount of matter in an object is called this, and it does not change no matter where the object is.
What is mass?
This is a characteristic of a substance that stays the same and does not change, no matter the amount of the substance.
What is a property?
This type of molecule is made of two hydrogen atoms and one oxygen atom bonded together.
What is a water molecule?
This occurs when substances interact and form one or more new substances with different properties.
What is a chemical reaction?
In the reaction CH₄ + 2O₂ → CO₂ + 2H₂O, this is the total number of oxygen atoms on the product side.
What is 4?
CH₄ + 2O₂ → CO₂ + 2H₂O
This property describes how easily a substance can catch fire and burn.
What is flammability.
Color, texture, and density are three examples of these characteristics of a substance.
What are properties?
When two or more atoms join together chemically, they form this.
What is a molecule?
In a chemical reaction, if you add THIS, you can separate Hydrogen and Oxygen from H20.
What is electricity?
In the Law of Conservation of Mass, it states that atoms cannot be _____ or _______, only rearranged.
What is created or destroyed?
When methane burns, it reacts with oxygen to form new substances like carbon dioxide and water. This is an example of what kind of change?
What is a chemical change (or chemical reaction)?