Unit II Part 1 Test Study Guide
Name____________________________________ Period________
th
Test Date: Thursday Dec. 17
Study Guide Due Date: Wednesday Dec. 16th
Study materials:
 Science Journal
 www.quizlet.com search chanousek and look for unit II. Can play vocab games.
Vocabulary- Know the definition and if there is a * be able to give an example.
1. Element*-made up of only one kind of atom Ex: helium
2. Compound*-made up of two or more different atoms Ex: CO2 or H20
3. Electron-negatively charged particle, orbits the nucleus
4. Neutron-NEUTRAL charge, located in the nucleus
5. Proton-positively charged particle, located in the nucleus
6. Atomic Number- number of protons number of electrons
7. Atomic Mass- neutrons + protons (found in nucleus) Need to round these number to the nearest whole
8. Nucleus-center of the atoms, contains protons and neutrons
9. Matter*- everything, it has mass and takes up space (volume) Ex: light saber
10. Atom- smallest unit of an element, can be found on periodic table
11. Mixture*-Contains 2 types of matter, not pure Ex: salt water, sand, lemonade
13. Freezing*-process of a liquid changing to a solid (heat is removed) Ex: water freezing to make ice
14. Melting*-process of a solid changing to liquid (heat is added) Ex: solid butter to liquid butter
15. Evaporation*-process of a liquid changing to a gas (heat is added) Ex: wet swim suit to dry swim suit
16. Condensation*-process of a gas changing to a liquid (heat is removed) Ex: water vapor (gas as a
liquid) from the shower changing into liquid when it hit the mirror(cold) in the bathroom.
17. Sublimation*-process of a gas changing into a solid or a solid changing into a gas without going
through the liquid phase Ex: Snow changing into water vapor without melting
18. Physical Properties*-properties of matter than can be observed, measured without changing the
matter Ex: volume, mass, density, color, texture, odor, length
19. Chemical Properties*-Describes matter based on its ability to change into new matter with different
properties Ex: flammability, reactivity, toxicity
20. Physical Changes*-A change in physical characteristics (size, shape, form), Changes in state of matter
is a physical change, no new substance is created, reversible EX: Slicing bread, Mixtures (lemonade),
condensation (gas to liquid)
21. Chemical Change*-A change where a new substance is formed, cannot be reversed. Hints: change in
color, new odor, sound produced, heat given off, smoke, light EX: Rust, fireworks, burning log
Concepts
1. Be able to accurately calculate the
number of protons, neutrons and
electrons.
Be able to label the electrons, protons,
neutrons and their charges.
Journal
Pages
Notes
41,44,45,47
2. Know the difference between an
element and compound.
Be able to give examples for each.
p. 55, 58,59
3. Be able to describe the attraction,
movement, volume and shape.
68
4. Be able to explain how heat
(adding & removing) affects solids,
liquids and gases.
72,73,
Boron’s atomic
number is 5. This means that it has 5
protons (+) located in the nucleus and 5
electrons (-) located in the shells
surrounding the nucleus. To calculate the
neutrons (neutral) the atomic mass of 10.8
would round to 11 and 11-protons (5)= 6
neutrons. Neutrons + Protons=atomic mass
Elements are made of only one kind of
atom, but it can have more than one of that
atom. EX: H2 is an element even though
there are 2 hydrogens.
Compounds are made up two or more
different kinds of atoms. EX: water (H2),
carbon dioxide (CO2)
Solid-strong attraction, vibrating
movement, definite shape and volume
Liquid-somewhat attracted, slide past each
other in movement, definite volume, no
definite shape-takes the shape of container
Gas-weak attraction, zooms quickly in
movement, no definite shape and no
definite volume
Solids, Liquids and Gases when heat is
added the space between the molecules
expands and the molecules/ particles move
faster.
Solids, Liquids and Gasses when heat is
removed the space between the molecules
contracts and the molecules/particles slow
down a bit.
5. Be able to calculate volume using
LXWXH and water displacement
method.
Be able to label your answers with
correct units.
76
6. Be able to identify chemical and
physical changes from an image.
Be able to list 2 reasons that support
your answer.
60-66
7. Be able to identify variables
(independent, dependent, constants)
when given a scientific method
experiment.
Unit I
p. 18, 19,
25
Regular shapes V=LXWXH Answers will
have the units cm3
Irregular shapes (water displacement)Measure volume of water in graduated
cylinder, place object in cylinder and
measure new water level. Subtract new
water level from first water level to
calculate the volume of the object.
Answers will have units ml (milliliter)
Bread Toasting=chemical change, new
color, new odor
Ice melting=physical change, all changes in
states of matter (solid to liquid) are
physical changes, no new substance,
reversible
Independent variable is the thing that is
changed in the experiment (X)
Dependent variable is the thing that we
measure in the experiment (Y)
The constants are the things that are kept
the same to ensure that only the
independent variable is being tested.
Constants are need to make sure that the
experiment is “FAIR”