Do Now Which particle diagram represents a solid? A liquid? A gas? How do you know? Compare the kinetic energy (KE) of each substance.

Do Now Solids have low kinetic energy because the particles move slowly Liquids have more kinetic energy because the particles move faster Gases have the most kinetic energy because the particles move very quickly Solid LiquidGas

Objective I can understand the relationships between, mass, volume and density and calculate these items using a group lab report.

Agenda Do now Objective and Agenda Elements and Compounds Review Vocabulary Preview Group Lab Chem Talk Vocabulary Review and Density Calculations Exit

Practice Fill out the following table following the example. Indicate whether each chemical formula represents an element or compound, and how many atoms of each element are in the formula. Chemical FormulaElement or Compound # of Atoms of Each Element O2O2 Element (1 type of atom) 2 oxygen atoms CO 2 Compound (2+ types of atoms) 1 carbon atom 2 oxygen atoms NH 4 Al Fe 2 CO 3

Practice Fill out the following table following the example. Indicate whether each chemical formula represents an element or compound, and how many atoms of each element are in the formula. Chemical FormulaElement or Compound # of Atoms of Each Element O2O2 Element (1 type of atom) 2 oxygen atoms CO 2 Compound (2+ types of atoms) 1 carbon atom 2 oxygen atoms NH 4 Compound (2+ types of atoms) 1 nitrogen 4 hydrogens AlElement (1 type of atom) 1 aluminum Fe 2 CO 3 Compound (2+ types of atoms) 2 Iron 1 carbon 3 oxygen

Quick Write What weighs more the feathers or the lead? Why do you think this?

Do they weigh the same? Turn to the person next to you and tell them what you think weighs more?

WHAT IS MATTER Anything that has MASS And takes up SPACE

Vocabulary Preview Mass is the amount of material in an object. It can be measured on a balance.

Important to Know Weights changes with gravitational force MASS remains the same at any location

Vocabulary VOLUME is the measure of space occupied by matter. It can be measured with a graduated cylinder.

Vocabulary

DENSITY is the amount of ‘stuff’ per space. It is described by mass divided by its volume. More denseLess dense

Mass, Volume & Density Lab Learning Goals SWBAT accurately measure the mass of solids and liquids SWBAT accurately measure the volume of solids and liquids SWBAT calculate the density of solids and liquids Group Roles Captain: read instructions, direct others Spokesperson: record data Time/Materials Manager: make measurements, keep track of materials Spy: ask teachers/other groups for help; help with measurements as needed

Before you begin… 1.Read through all instructions as a group. 2.Draw Pictures for steps 1 -6 next to instructions to show what happens in each step of the experiment. 3.Get teacher signature 4.Once you have a signature the time/materials manager may get materials and you may begin working.

Lab Time Complete Parts A – E with your lab group Time: 35 minutes

Quick Write Did the different liquids and objects have the same densities or different densities? What do you think would happen if you put two liquids of different densities together? Can you think of an example in real life? Substances often separate according to their density. More dense materials sink below less dense materials

Density Column

Quick Write Why do the liquids form layers in the Density Column? How could a gold miner apply this concept to finding Gold in a stream?

Gold Panning and Density

Chem Talk Review what you have learned about the relationship between mass, volume, and density with a guided reading of the ‘Chem Talk’ on pages 138 – 139 in your textbook (Stop at the measurements section). As you read, answer the following questions in your binder: 1.What units are used to measure density? 2.What is the formula to calculate density? 3.Use the approximate density chart on page 138. Does copper float or sink in distilled water? 4.Does balsa wood float or sink in distilled water? 5. Does nickel float of sink in distilled water?

Exit Ticket Based on what you learned today… You have a rock sample with a volume of 5ml and a mass of 25 grams. What is the density of the rock?