Level 1
Why do different substances have different properties?
Different substances are made up of different groups of atoms that give them different properties
How are reactants and products similar?
The both contain atoms and molecules
Explain (using strong evidence ONLY) why the iron and fertilizer mixing in the water pipes is an example of a chemical reaction? Use vocabulary terms you have learned in this unit in your response.
The atoms in the iron and fertiziler rearranged to form a new substance with a different formula than it had before. Also, the color was different
Carbon Monoxide ( CO) and Carbon Dioxide ( CO2) are the same substance. Do you agree or disagree? Support your claim with strong evidence.
They are not the same substance because carbon monoxide only has 1 carbon and 1 oxygen atom in the molecule and carbon dioxide has 1 carbon atom and 2 oxygen atoms in the molecule.
molecules
repeating atom groups that form separate units
What information does a chemical formula contain?
It tells us the type of atoms and how much of each atom there are
How are reactants and products different?
The atoms that form there are arranged differently
Explain how a phase change is different from a chemical reaction?
Phase change does not rearrange the atoms into a different substance, a chemical formula does rearrange the atoms
extended structures
repeating atom groups that are linked together in large networks
What do atoms do during chemical reactions?
They rearrange to form new substances
Explain what happened when the iron and the fertilizer mixed with each other in the water pipes in the city of Westfield. This is from Amplify.
The iron and fertilizer atoms rearranged to form a new substance called rust
substance
matter with a composition (molecules) that is always the same
What happened when you mixed the two clear substances together during the lab experiment?
The atoms rearranged to form a new substance and the evidence to support it is the reactants were clear and the products were white
Give an example of a chemical reaction you have observed in your life?
reactant
the atoms / molecules that are present before a chemical reaction
Can you identify one property of a pencil?
It is a solid, hard surface, dark end, soft rubber eraser, etc.
Give a non-example of a chemical reaction you have observed in your life?
Mixing salt into water
product
the new substance(s) that are present after a chemical reaction