722.9 g g 45.5 g g 514 g

d. Bunsen burner e. test tube i. tongs b. graduated cylinder a. beaker h. Erlenmeyer flask j. ring stand g. funnel f. test tube clamp c. balance

3.3 cm 5 mm0.5 cm 33 mm 5.5 cm55 mm 7.0 cm70 mm 8.3 cm83 mm 3.7 cm 5.8 cm 12.5 cm 1.4 cm 8.4 cm 10.8 cm 0.4 cm

56 mL4.3 mL23 mL 17 mL76 mL 5.2 mL 32 mL3.4 mL47 mL

Unit 3 Study Guide Bozenmayer, Alexander, Albano 2014 – 2015

Anything with mass AND volume. X X

E Made of only 1 type of atom CM C Two elements in fixed amounts Different compounds physically combined Mixture that does not appear to be the same throughout Mixture that appears to be the same throughout Sand, trail mix Salt water, syrup

Anything with mass AND volume. 2 or more elements that are chemically combined in fixed amounts

X X Mixture that does not appear to be the same throughout Sand, trail mix Mixture that appears to be the same throughout Salt water, syrup

A C B D

C P C C P P Just changing shape/size. Color change due to reaction. Yeast rises due to reaction. Just changing shape. Phase changes are physical changes.

D C D D

D P C C P P Just changing shape/size. Color change due to reaction. Yeast rises due to reaction. Phase changes are physical changes.

Part 1. Elements, Compounds, Mixtures (Study your “Graphic Organizer” notes, and “Stations Activity”, “Elements, Compounds, Mixtures” graded assignment, “Elements, Compounds, Mixtures” quiz and think back on the sludge lab)

21.What is the definition and an example of a heterogeneous mixture? Heterogenous mixtures are made of 2 or more elements, but keep their properties. They are unevenly mixed and do not appear the same throughout. Sand and trail mix are two examples.

22.What is the definition and an example of a homogeneous mixture? Homogeneous mixtures are made of 2 or more elements, but keep their properties. They are evenly mixed and appear the same throughout. Sugar water and syrup are two examples.

23.What was the big idea for elements, compounds, and mixtures?

Part 2. Physical/Chemical Changes (Study your “Physical/Chemical Change” demo sheet, think back on your “Physical/Chemical Changes” graded assignment, and “Chemistry in a Bag” lab)

24.What is a physical property? List some examples. A physical property is a characteristic of matter such as size, shape or phase that can be observed with your senses and measured without changing the identity of the substance. Some examples are color, texture, size, phase, melting point.

25. What is a chemical property? List some examples. A chemical property is a property of a single substance that is not easily observed, and describes how the substance REACTS with other matter. Examples are flammability, reactivity,

26.What is the definition of a physical change? List some examples. A physical change is when a substance undergoes a change in some properties but keeps MOST of its properties, and does NOT create a new substance. Examples: cutting paper, breaking a mirror.

27.What is the definition of a chemical change? List some examples. In a chemical change, a NEW substance is created, two separate substances combine and rearrange their atoms. The new substance will have DIFFERENT properties. Examples are burning wood, spoiled milk.

28.What are four hints or ways you know that a chemical change has occurred? Four hints that a chemical change has occurred are: color change, precipitate formed, bubbles, an energy change.

29.Are phase changes physical or chemical changes? Why? Phase changes are physical because it is still the same substance, just more or less tightly packed, molecules moving faster or slower.