Study Guide Answers--Test --A day Weds Nov2-- B day Thurs Nov 3

Study Guide Answers for Unit 1

1. C
2. A
3. B
4. D
5. C
6. C
7. A
8. B
9. D
10.A
11.C
12.D
13.C
14.C
15.D
16.B
17.C
18.A
19.D
20.A
21.D
22.C
23.B
24.I
25.C

SHORT RESPONSE
25. A solution is a homogeneous mixture that looks as though it is all one substance. Some examples are: apple juice, salt water, lemonade
26. Cake rises (density changes); changes color; changes from liquid to solid
No these changes can not be reversed. They are evidence that a chemical change occurred.
27. An increase in temperature occurred, This is because when the temperature increases the energy of the particles increases thereby expanding the balloon
28. Protons-positive subatomic particle in nucleus of atom
Neutrons- neutral subatomic particle in nucleus of atom
29. Electrons are negative subatomic particles that are found in the electron cloud
30.Chemical change=new substance formed; change in identity
Physical change=no new substance; no change in identity
31. Period-horizontal row on periodic table, arranged in increasing order as you move to the right on the Table
Group-Vertical column on the periodic table; elements in each group have shared chem. and phys. properties.