Structures of Matter
The smallest unit of matter which has all the properties of the element.
What is an atom?
A process that involves the rearrangement of atoms to form new substances.
What is a chemical reaction?
______________________ makes a new substance.
What is a chemical change?
Matter can neither be _____________ nor ______________.
What is created, destroyed OR made, lost.
The ratio of mass per unit of volume (g/mL)
What is density?
Diamond and graphite are both made of carbon atoms. Diamonds and graphite are both made of the same __________.
What is an element?
These are the ingredients of a reaction; they are on the left side of the arrow.
What are reactants?
Boiling water, breaking ice, and carving wood are examples of _______________
What is a physical change?
When there are the same number of each type of atom on the reactant side as the product side the equation is __________
What is balanced?
_________ and _________ are needed to calculate density.
What is mass and volume?
When two or more different atoms are joined together
What is a compound?
The model of a chemical reaction using symbols and chemical formulas.
What is a chemical equation?
Thermal energy flows from ___________ matter to cooler matter.
What is warmer matter?
According to the law of conservation of mass. Matter is not created nor destroyed and the same amount of ___________ remains.
What is mass?
Useful materials that benefit people are synthesized from_________________.
What are natural resources?
A substance that cannot physically be broken down into smaller parts
What is a pure substance?
List at least 3 indicators of a chemical change.
What are color change, gas is produced (bubbles), a precipitate (solid) is formed, odor change, or Release/absorption of energy (temperature change)
An __________ in thermal energy causes particles to move randomly and more rapidly due to increased kinetic energy.
What is increase?
The _______________________ states that a mixture weighs the same as the weight of all the parts of the mixture.
What is the law of conservation of mass?
Silk, rubber, and wool are made of long chains of repeating units that occur naturally.
What are monomers?
Students are designing an experiment that investigates the effect of particle size on the separation of a mixture. The particle size of the sand and salt mixture is the ______________ variable.
What is the independent variable?
When iron combines with oxygen in a moist environment, _________ forms because of a ____________.
What is rust and a chemical reaction?
A type of chemical reaction that releases heat.
In the reaction on the board, Iron reacts with water to form iron oxide and hydrogen gas. This is an example of a _______________ chemical equation.
What is a balanced chemical equation?
What are the PRODUCTS in the equation on the board?
What are carbon dioxide and water?