Characteristic physical properties SC.8.P.8 Properties of Matter SC.8.P.9 Changes in Matter Atoms Changes of State Mass and Weight Acids, Bases, Salts Density Characteristic physical properties Click on pictures for links to student tutorials.

How is matter identified? List all the ways a mysterious piece of matter in a paper bag can be identified.

Create a similar chart in your SIN. Matter is classified by its characteristic properties including density, conductivity, magnetic properties, solubility, melting and boiling points. Create a similar chart in your SIN.

A finite number of elements combine in different ways to produce all living and non-living things. Draw the element Boron in your SIN and label all its parts. EXPLAIN how elements make almost an unlimited amount of types of matter.

Which group of elements are the MOST reactive? EXPLAIN your reasoning. Elements are grouped in the periodic table according to similarities of their properties. Which group of elements are the MOST reactive? EXPLAIN your reasoning.

Describe what is going on with the atoms of each type of matter. States of matter are determined by the motion of the particles. Describe what is going on with the atoms of each type of matter.

Elements combine to form compounds. Compounds include acids and bases. When an acid reacts with a base a salt is formed. Create the pH scale in your SIN and label where the MOST acidic and MOST basic would be located.

Describe how a mixture is different than a pure substance.

A pure substance has only one kind of matter, a mixture has two or more kinds of matter. Some mixtures are solutions. Give an example of a pure substance, a mixture, and a solution. EXPLAIN your reasoning for each example.

A solution is a mixture in which the molecules of one substance (solute) are dissolved in another substance (solvent). They often look like a single substance and have the same properties throughout. Identify the solvent and the solute in the solution you named from last slide. Explain.

In a chemical change, the particles of matter rearrange to form new products. Give an example of a chemical change found at school. Explain your reasoning. In a physical change, the particles of matter remain the same. Give an example of a Physical change found at school. Explain your reasoning.

Regardless of what kind of change occurs to matter, mass is always conserved! Using your examples from the previous slide, EXPLAIN how mass was conserved in each.

52 Which of the following statements best describes the basic structure of an atom? A Electrons and protons are in motion around a nucleus that contains neutrons. B Neutrons are in motion around a nucleus that contains protons and electrons. C Protons are in motion around a nucleus that contains electrons and neutrons. Answer: D D Electrons are in motion around a nucleus that contains protons and neutrons.

53 Travis is making iced tea. He wants to make it sweet so he adds sugar into the tea and water mixture and stirs it. The sugar is considered which of the following? A solute B solution C solvent D mixture Answer: A

54 Andy stirred 100 grams of salt (sodium chloride, NaCl) into a pot of water until he could no longer see any grains of salt. Which of the following best describes the resulting liquid? A mixture B solvent C solute Answer: D D solution

The solution is saturated. 55 Tomeka is dissolving sugar into 20 mL of warm water. She puts in 50 grams of sugar and it all disappears. She puts in 100 grams of sugar and some of the sugar remains at the bottom of the baker no matter how much she stirs it. Which statement is true? A The solution is saturated. B The solute can hold more solvent. Answer: A C The solvent is fully dissolved. D The solution cannot reach full saturation.

56 In 460 BCE a Greek philosopher named Democritus came up with the idea that all things are made of small particles called atoms. Since that time, scientists have been creating models of the structure of the atom. Why are models of the atom constantly changing? A The atom's structure is constantly changing, and scientists need to keep up with these changes. B The scientist's understanding of atomic structure changes as they conduct new experiments. Answer: B C With each new discovery, scientists decide that the old models no longer have any educational value. D As scientists make new elements, they have to create new models for the atoms of these elements.

Which of the following is the best example of a solution? 57 Which of the following is the best example of a solution? A An omelet made of scrambled eggs and cheddar cheese B A chocolate chip cookie C Trail mix made of raisins, peanuts, and chocolate candies Answer: D D Lemonade made of water, lemonade powder mix, and sugar