Study Guide for 2nd Nine Weeks Exam
Unit 1 Vocabulary: observations, qualitative observations, quantitative observations, inference, classify,
estimate, measurement (length, mass, temperature, volume, time), experiment, predict, hypothesis,
independent variable, dependent variable
Science notebook pages 0 – 17
0-1 LAB SAFETY
Why is it important to be safe in the Science Lab? Why do we need to follow safety procedures?
2-3 OBSERVATIONS
What kinds of observations do scientists make? Why do scientists need to make observations? Can you
explain the similarities and differences between the two types of observations? Are you able to make
qualitative and quantitative observations?
4-5 INFERENCES
How do scientists make inferences? What is the difference between an observation and an inference? How
can you use observations to make inferences? How did you make inferences during the Mystery Footprints
activity? Do you make inferences in your everyday life?
6-7 CLASSIFYING
What do scientists do when they classify? Why might scientists need to classify information? How can
you classify objects in the classroom? How is the periodic table classified?
8-13 MEASUREMENT
What is length, mass, volume, and temperature? How do scientists measure each type of measurement?
What unit is used for length, mass, volume, and temperature? Why do scientists need to make
measurements? Before measuring, do you estimate?
14-17 PENDULUM INVESTIGATION – HYPOTHISIS, INDEPENDENT AND DEPENDENT
VARIABLE
Why do scientists conduct experiments? What were we trying to discover during our experiment with the
pendulum? Were you able to discover if the length of string affects the number of times the pendulum
swings in 30 seconds (time)? Using the data collected from your observations, were you able to form a
hypothesis? Does the hypothesis answer the question posed at the beginning of the investigation? What
was the independent variable in the investigation? What was the dependent variable? Can you predict
what might happen to the frequency of the pendulum if the length of the string were 200cm?
Unit 2 Vocabulary: matter, atom, physical property, mass, weight, volume, density, fluid, buoyancy,
Archimedes’ principle, solid, liquid, gas, temperature, melting point, freezing point, boiling point,
condensing point, chemical property, reactivity, acid, base, neutralization, physical change, chemical
change, precipitate, chemical bonds, chemical reaction, reactants, products, chemical equation, law of
conservation of mass
Textbook pages 48 - 85
Science notebook pages 20 - 51
20-21 THE ATOMS FAMILY
Who are the members of the Atoms Family? Who likes to hang out in the nucleus? Who races around the
nucleus because he can’t get in?
22-27 PHYSICAL PROPERTIES
Know the Physical Properties Study Guide. How do you measure volume (liquids and solids), mass, and
weight? What is conductivity, malleability, ductility, hardness, and attracted to magnets?
28-31 DENSITY AND BUOYANCY
What is density and buoyancy? Does the amount of water affect the density of the water? How do you
calculate density? Why do objects sink or float?
34-39 SOLIDS, LIQUIDS, AND GASES
Know the Lesson Outline. Can you identify the properties of solids, liquids, and gases? What happens to
the states of matter when energy is added and removed? Can you identify the line graphs that represent
boiling, condensing, melting, and freezing?
40-45 CHEMICAL PROPERTIES
Know Study Guide Questions and Lesson Outline; How can you identify an unknown substance? What
does a pH scale measure?
46-47 PHYSICAL AND CHEMICAL CHANGES
What are physical changes? What are chemical changes? What are signs of chemical changes? How are
physical and chemical changes alike and different?
48-51 CHEMICAL REACTIONS
Know the Lesson Outline. What are products and reactants? Can you explain the law of conservation of
mass? How did you prove the law of conservation of mass to be true during the investigation?
Unit 3 Vocabulary: electron, nucleus, proton, neutron, electron cloud, element, atomic number, isotope,
atomic mass, periodic table, compound, exothermic reaction, endothermic reaction
*atomic mass = the mass of the proton and neutron added together
Textbook pages
Textbook pages 128-133, 138-145, 150-151, 154-155
Science Notebook pages 52 - 66
52 – 53 ATOMIC STRUCTURE AND THE PERIODIC TABLE
Know how the atom is arranged. Know the notes from the video.
54 – 55 ATOMS
Study lesson outline. How did technology help with what we know about the atom today? What did Niels
Bohr do?
56 – 59 THE ELEMENTS
Study the lesson outline. What elements make up the human body? Know how to find the symbol, atomic
number, atomic mass, number of protons, number of neutrons, and number of electrons using the periodic
table. Know how to draw the atomic structure of an element. Know the difference between metals, nonmetals, and metalloids. How is the periodic table similar to a map?
60 – 63 COMPOUNDS
What is a compound? What does a chemical formula show? What are some common compounds you use
everyday? What is an organic compound? You do not need to know ionic and covalent bonds.
64 – 65 CHEMICAL REACTIONS AND ENERGY
What is an endothermic reaction? What is an exothermic reaction? What happens to the energy in each
type of reaction?