Week 4 9/22 – 9/26

The Highlander Sheet  Objective: Practice calculating density of metals to identify an unknown metal. New WHOT today. (remember your science journals should be out.) 9/22

To Quiz or Requiz?

An 4-point answer for the quiz… When the Deepwater Horizon exploded oil from deep in the ocean was released. The oil and sea water are not soluble, so the two materials did not mix. Instead they formed two layers. Due to oil being less dense and insoluble it formed a layer at the surface. The insoluble oil easily spread because of waves and currents in the ocean, eventually making it to shore where many animals were affected. The insoluble oil and water reminds me of car oil on rainy Seattle streets. When it rains the less dense oil sits at the surface making it really slippery for drivers.

Practice makes perfect.  Density Practice problems.

Lets practice more density problems… you have 4 minutes per question! Use your science journals to work the problems. These are Practice Problems: Show all work. 1.What is the formula for Density. Write it down.

2.Joshua was working in a lab to find the volume of an object. He filled a graduated cylinder up to 22.4ml with water. He then added the object to the cylinder and the cylinder now had a final volume of 44.0ml. What was the volume of the object. 3. Ali found the mass of an unknown metal to be 35.1g. He used a graduated cylinder and water to find the volume to be 13ml. What was the density of the object. What was the unknown metal. 4.Daniella was working with an unknown metal. She found the mass to be and the volume to be 15.0ml. What was the density of the object. What was the metal. 5.You are helping out your classmate Tavin from Mrs. Harold’s physical science class with a density problem. Tavin was not paying attention during the lab and only got the data. Help Tavin out by finding the unknown metal from his data

Some time to finish quiz.

The Highlander Sheet  Objective: Calculate density using a mass and volume to identify unknown metals.  Responsibilities: Density Lab due WEDNESDAY: This includes Data Table, Post Lab Q’s, and Graph. WHOT QUESTION: WHOT QUESTION: What can we say about relative the density of mercury, water, and benzene?

The Highlander Sheet9/23  Objective: Explain density at the particle level.  Responsibilities: Vocab –  Intensive properties  Extensive properties  Lab Due Tomorrow. What parts do you have left to finish? Check now and write it down.

Grab your stuff head to the back of the room.

Create a new entry entitled, “Mind over Matter”  Begin by creating a T-chart Fact or idea I read Question I have about the fact or idea You need to calculate density Density is a derived quantity. What does it mean to be a derived quantity?

After reading answer these questions in your journal a. Imagine you are looking at 2 chains that are the same in every respect except that one is made of silver and the other is made of platinum. Which one would have a greater mass? Why? b. Jewelers measure the mass of gemstones in carats. One carat is equal to 200 milligrams (mg). Which would look bigger, a 1-carat diamond or a 1-carat cubic zirconia? Why? c. A silver ring has a density of 10.5 g/cm 3. A polished aluminum copy looks the same, but a ring with a volume of 2 mL (measured by displacement) has a mass of only 5.4 g. Compare the densities of the metals that make up the 2 rings. Record any calculations you make. Material Density (g/cm 3 ) Silver10.5 Platinum21.1 Diamond3.5 Cubic Zirconia 5.8

VOCAB at a Glance  Density  Soluble  insoluble  Polar  Nonpolar  Derived quantity  Displace (eg finding volume by displacement)  Intrinsic property  Extrinsic property  Atoms  Elements  Compound  Molecule  Pure substance  Mixture  Cubic centimeter

WHOT about today?  WHOT QUESTION:  WHOT QUESTION: Give 2 examples of each not used in the book:  Intensive properties  Extensive Properties  Responsibilities: Lab Due Tomorrow! Data Table, Graph, Post Lab Q’s.

The Highlander Sheet9/24  Objective: To explain the particle nature of all matter.  Responsibilities: atoms, elements, compound, molecule, pure substance, mixture

Intensive VS Extensive  Extensive Examples…  Intensive Examples…

After reading answer these questions in your journal a. Imagine you are looking at 2 chains that are the same in every respect except that one is made of silver and the other is made of platinum. Which one would have a greater mass? Why? b. Jewelers measure the mass of gemstones in carats. One carat is equal to 200 milligrams (mg). Which would look bigger, a 1-carat diamond or a 1-carat cubic zirconia? Why? c. A silver ring has a density of 10.5 g/cm 3. A polished aluminum copy looks the same, but a ring with a volume of 2 mL (measured by displacement) has a mass of only 5.4 g. Compare the densities of the metals that make up the 2 rings. Record any calculations you make. Material Density (g/cm 3 ) Silver10.5 Platinum21.1 Diamond3.5 Cubic Zirconia 5.8

Super student read in best news anchor voice: You have seen in your work with solids and liquids that, regardless of how much of the material you have, the density of the material remains constant. So, theoretically, if you cut a 1 cm cube in half, then in half again, and keep cutting it repeatedly, each piece would have a smaller size but the same density as the original cube. About 400 BC a Greek scientist and philosopher named Democritus thought about this and what it meant about the fundamental composition of matter. Imagine what would happen if you could go back in history to interview him.

Democritus Student #1 Student #2

VOCAB at a Glance  Density  Soluble  insoluble  Polar  Nonpolar  Derived quantity  Displace (eg finding volume by displacement)  Intensive property  Extensive property  Atoms  Elements  Compound  Molecule  Pure substance  Mixture  Cubic Centimeters 2 1

WHOT QUESTION:  What must be true about the particles that make up matter to explain macroscopic differences in density?  Fill in the pictures below with atoms for each sample of element. Each sample is 1 cm 3  Responsibilities:  Vocab Quiz Friday. Silver Density 10.5 g/cm3 Platinum Density 21.1 g/cm3

WHOT ABOUT TODAY???  What did Democritus think that was so profound? What was it that amazed him and why?

The Highlander Sheet9/25  Objective: Practice building properties of matter vocabulary.  Responsibilities: Second Science Contract.

WHOT QUESTION:  What must be true about the particles that make up matter to explain macroscopic differences in density?  Fill in the pictures below with atoms for each sample of element. Each sample is the same volume  Responsibilities:  Vocab Quiz Friday. Silver Density 10.5 g/cm3 Platinum Density 21.1 g/cm3

WHOT QUESTION:  What must be true about the particles that make up matter to explain macroscopic differences in density?  Fill in the pictures below with atoms for each sample of element. Silver Density 10.5 g/cm3 Platinum Density 21.1 g/cm3

Vocab  Atoms  Elements  Compound  Molecule  Pure substances  Mixtures The smallest particle that cannot be further divided. A single type of atom. When atoms of different elements combine chemically. The smallest unit of a compound. A group of molecules that together always have the same characteristic properties. When two or more pure substances are blended together.

Stations.  Word Wall  Write the definition of 1 word from each column and illustrate it.  Matching  Match each word with its corresponding definition  Paragraph + Particle Models.  Read the paragraph and fill in the blanks.  After the Paragraph draw particle models of graphite and wood.  R&C  Questions from the book

VOCAB at a Glance  Density  Soluble  insoluble  Polar  Nonpolar  Derived quantity  Displace (eg finding volume by displacement)  Intensive property  Extensive property  Atoms  Elements  Compound  Molecule  Pure substance  Mixture  Cubic Centimeters 2 1

WHOT QUESTION:  Describe the difference between atoms, elements, and molecules.  Responsibilities: Quiz tomorrow.

Bench Station Particle Density  Fill in the pictures below with atoms for each sample of element. Each sample is the same volume. Use at least a total of 10 dots to represent particles in each. Graphite Density 2.0 g/cm3 Wood Density 1.0 g/cm3

Welcome to Friday!!!  Turn in your WHOT… it could be a song… it really could…  Take 5 minutes to study vocab.