Matter Basics
Anything that has mass and takes up space
What is matter?
This is the smallest unit of an element that still has the properties of that 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?
In the combustion of methane, these two substances are the reactants.
What are methane (CH₄) and oxygen (O₂)?
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 or trait 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 6?
This property describes how easily a substance can catch fire and burn.
What is flammability.
Color, texture, and density are three examples of these observable or measurable traits of a substance.
What are properties?
When two or more atoms join together chemically, they form this.
What is a molecule?
This is the specific chemical reaction where water molecules are split into hydrogen and oxygen gas using electrical energy.
What is electrolysis of water?
When a chemical reaction happens, this law states that matter is not created or destroyed, only rearranged.
What is the Law of Conservation of Mass?
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)?