CURRICULUM | SCIENCE | TECHNOLOGY | ENGINEERING | MATH
“Sometimes it is the people no one can imagine anything of, who do the things no one can imagine.” - Alan Turing
DESCRIBING MATTER
DAY 3
WARM-UP (7 MIN)
In your notebook, always include the date, the lesson title, and do the warm-up task associated to that date.
Task: *Complete the Musical Warm-Up: "What is that?"*
WARM-UP DISCUSSION (3 MIN)
*What determines if something is a mixture?*
LAB: *COMPOUNDS MIXTURES SOLUTIONS AND CHEMICAL FORMULAS* (15 MIN)
In your notebook, always include the date, the lesson title, and do the warm-up task associated to that date. FOR LABS, IF NO SHEET IS PROVIDED, YOU MUST RECORD STEP TITLES AND YOUR ANSWERS IN YOUR SCIENCE NOTEBOOK
Purpose: To exhibit the fundamental building blocks of matter. We need to compare and contrast atoms, to elements, to molecules, to chemical bonds.
Materials: Molecule Kits, Salt, Water, Random Mix of Small Items Like Trail Mix
Procedure:
STEP 1: THE COMPOUND KNOWN AS WATER: Refer to your chart in your notebook that identifies what each color ball represents. Create a model of a water molecule, also known as "H2O." When viewing the chemical formula, notice the 2 after the symbol for Hydrogen. (H) Here we are looking at 2 Hydrogen atoms and 1 Oxygen atom. It is 1 Oxygen atom because there is no number after the symbol for Oxygen. (O) . Draw your model in your notebook under STEP 1: THE COMPOUND KNOWN AS WATER. Keep your water molecule
STEP 2: MIXTURES: Build a molecule of NaCl. Put it next to the water molecule. Now you are looking at a mixture of NaCl and H2O. Draw these models in your notebook under STEP 2: MIXTURES. Now take a teaspoon of salt and mix it with 100mL of water. You are now looking at a Homogeneous mixture. Explain why this is the case in your notebook by looking at the definition of homogeneous mixture. Truthfully, when salt mixes with water, the water molecules cause the salt molecules to break apart into the atoms by themselves. The resulting homogeneous mixture is known as a solution.
STEP 3: HETEROGENEOUS VS. HOMOGENEOUS: Look at your resulting homogeneous mixture from STEP 2. Now take a look at the trail mix. The trail mix is a heterogeneous mixture. Explain why it's a heterogeneous mixture in your lab notebook under step 3. Make sure you describe your thoughts in complete sentences.
STEP 4: CHEMICAL FORMULAS: Take a look at the molecule on Mr. Amen's Desk. This molecule represents sugar. In your lab notebook write the number of elements present. Write the total number of atoms present. Then write the number of atoms of each element present. Mr. Amen has a chemical formula written on a note card for sugar. Write your own chemical formula and see if it matches his. Make sure you include your answer and his answer. Mr. Amen will sign your notebook when checking for understanding.
THE NOTES: DAY 3 VOCABULARY (10 MIN)
*Write these down in your notebooks*
Compound - a pure substance made of two or more elements chemically combined in a set ratio
Chemical formula - shows the elements in the compound and the ratio of atoms.
Mixture - made of two or more substances - elements, compounds, or both - that are together in the same place but are not chemically combined.
Heterogeneous mixture - A mixture where you can see the different parts.
Homogeneous mixture - A mixture where the substances are so evenly mixed that you can’t see the different parts.
Solution - an example of a homogeneous mixture. It usually is made of a solid (Solute) and a liquid. (Solvent)
KEY CONCEPT- When elements are chemically combined, they form compounds having properties that are different from those of the uncombined elements.
KEY CONCEPT - Each substance in a mixture keeps its individual properties. Also, the parts of a mixture are not combined in a set ratio.
EVALUATION (10 MIN) + HOMEWORK
We'll wrap it up here with today's assessment in your learning management system. Feel free to study your notes and/or the videos below. We always recommend viewing the videos the night before the lesson.