Chemical Change
Atoms are ___________.
Rearranged
In physical change, no _________ substance is formed.
New
The __________________ states that the mass of the products must be equal to the mass of the reactants.
Law of Conservation of Mass
What Acronym was used to describe Chemical Reactions?
F.A.R.T.S
What does CER stand for?
Claim, Evidence, Reasoning
A new __________ is formed.
Substance
Only the __________, ___________, or _________ changes.
state, shape or size
If a chemical reaction is not balanced, _________ must be added so that there are equal numbers of all atoms on both sides of the equation.
coefficients
In the acronym that is used to describe chemical reactions, what does the "T" stand for?
Temperature Change
What is the purpose of a claim?
To answer the question
A chemical change occurs when......
one or more substances are transformed into new substances with different properties.
True/False: Melting Ice is a physical change?
True
When balancing an equation what is step one?
Count the number atoms of each element on both sides of the equation.
In the acronym used to describe chemical reactions, what does the "S" stand for?
Substance
What is evidence?
Data or observations from an experiment
True/False:
Energy is usually absorbed or released.
True
True/False: Crushing a can is a physical change?
True
In step 2 how do you balance the equation?
by adding coefficients for elements that aren’t equal on both sides.
In the acronym used to describe chemical reactions, what does the "A" stand for?
Aroma
What does reasoning explain?
Why the evidence supports the claim using scientific/chemistry concepts
Signs of chemical change?
-Color change
- Temperature change (without external heating/cooling)
-Gas production (bubbles, odor)
-Formation of a precipitate (solid forms in liquid)
- Light or sound produced
True/False: Cutting paper is a physical change?
True
How do you know when your equation is balanced?
When atoms on both sides are balanced
In the acronym used to describe chemical reactions, what does the "F" stand for?
Fizz
Weak or Strong claim:
A chemical change occurred.
Weak