In combination reactions two or more substances react to form one product
In a decomposition reaction one substance undergoes a reaction to produce two or more other
Combustion reactions are rapid reactions that produce a flame
Macroscopic realm of ordinary sized objects
Submicroscopic realms of atoms and molecules
Law of constant composition law of definite proportions Joseph Proust the elemental
composition of a compound is always the same
Intensive properties do
Name _ Pd _
cell respiration open response question
A student poured a solution of bromthymol blue indicator into three test tubes. Then, he placed an aquatic
plant in two of the test tubes, as shown below. He placed a stopper on each test tube and
Chapter 18 Section 3 Assessment
List and explain three things that can happen to a light wave when it enters a new medium.
Three things that can happen to a light wave when it enters a new medium are:
Reflection When light reflects from a surface, it m
Chapter 18 Section 1 Assessment
What produces electromagnetic waves?
Electromagnetic waves are produced by constantly changing electric and magnetic fields
when an electric charge vibrates or accelerates.
How fast does light travel in a vacuum?
Chapter 18 Assessment
can travel through empty space
17. How do polarized sunglasses work?
Polarized sunglasses work to reduce glare by having vertically polarized filters, which block
Chapter 17 Vocabulary Review
Mechanical wave a disturbance in matter that carries energy from one place to another.
Transverse wave a wave that causes a medium to vibrate at right angles to the direction in which the
Chapter 17 Section 4 Assessment
List five properties used to explain the behavior of sound waves.
Five properties used to explain the behavior of sound waves are:
2) Intensity the rate at which a wave's energy flows through a given unit of are
Chapter 17 Section 3 Vocabulary
Obstacle an obstruction that stands in the way. (p. 510)
Elastic returning to or capable of returning to an initial form or state after deformation. (p. 512)
Stationary not moving. (p. 512)
Reflection the inter
Chapter 17 Section 2 Vocabulary
Time interval a definite length of time marked off by two instants. (p. 504)
Cycle a complete motion that returns to its starting point. (p. 504)
Displacement the distance of an oscillating body from its centra
Chapter 17 Secion 1 Vocabulary
Energy the ability to do work. (p.500)
Vibration a repeating back-and-forth motion. (p. 500)
Motion movement. (p. 500)
Friction a force on objects or substances in contact with each other that resists motion of
Chapter 9 Section 4 Assessment
What happens to sunlight during photosynthesis?
During photosynthesis, energy from sunlight is converted into chemical energy.
Describe the relationship between photosynthesis and cellular respiration.
Chapter 9 Section 1 Assessment
Name the three main fossil fuels.
The three main fossil fuels are:
2) Natural gas
What are the two primary products of the complete combustion of fossil fuels?
The two primary products of the compl
Chapter 8 Standardized Test Prep
3. Which pH indicates a solution of an acid?
5. What reaction occurs when a solution of hydrochloric acid, HCl, is mixed with a solution of
calcium hydroxide, Ca(OH)2?
(C) 2HCl + Ca(OH) 2 > 2H2O + CaCl2
Chapter 8 Section 4 Assessment
How is pH related to the concentration of hydronium ions in solution?
pH is related to the concentration of hydronium ions (H3O+) in solution in that the lower the
pH value, the greater the H3O+ ion concentration in solut
Chapter 8 Section 3 Assessment
List three general properties of acids.
Three general properties of acids are sour taste, reactivity with metals, and ability to produce
color changes in indicators (turn blue litmus paper red).
List three general prop
Chapter 8 Assessment
3. Sugar dissolves in water through
4. Ionic compounds produce ions in solution by
5. The process by which some molecular compounds dissolve in water to form ions is
7. Which or the fo
Chapter 6 Section 4 Assessment
1. What holds metal ions together in a metal lattice?
The metal ions are held together in a metal lattice by strong metallic bonds between the
cations and the surrounding valence electrons.
2. What characteristic of a metall
Chapter 6 Section 3 Assessment
1. What does the formula of an ionic compound describe?
The formula of an ionic compound describes the ratio of the ions in the compound.
2. What do the name and formula of a molecular compound describe?
The name and formula
Chapter 6 Section 2 Assessment
1. What attractions hold atoms together in a covalent bond?
The attractions between the shared electrons and the protons in each nucleus hold the atoms
together in a covalent bond.
5. What is a molecule?
A molecule is a neut
Chapter 6 Assessment
When an atom loses an electron, it forms a(n)
The charge on a chloride ion in AlCl3 is
Which pair has the same electron configuration?
(a) Cl and Ar
A chemical bond that forms when atoms share electrons
Chapter 5 Section 3: Representative Groups
List 2 key properties for each group
The Alkali Metals
have 1 valence electron
extremely reactive; never found uncombined in nature
The Alkali Earth Metals
have 2 valence electrons
Slightly less reactive and hard
Fill in the blanks below to label the major groups and divisions of the periodic table.
The vertical columns on the periodic table are called _.
The horizontal rows on the periodic table are called _.
Most of the elements in the perio
Chapter 5 Multiple Choice Questions
1. Who created the first periodic table?
2. Elements are arranged in the periodic table by
increasing atomic mass
increasing atomic num
Chapter 4 Section 3 Assessment
What model do scientists use to describe how electrons move around the nucleus?
Scientists use the electron cloud model to describe the possible locations of electrons around
the nucleus. An electron cloud is a visual mod
Chapter 1 Section 3 Assessment
Why do scientists use scientific notation?
Scientists use scientific notation because it makes very large or very small numbers easier to work
with by expressing a value as the product of a number between 1 and 10 and a p
Chapter 1 Section 4 Assessment
How do scientists organize data?
Scientists organize data by using data tables and graphs.
How can scientists communicate experimental results?
Scientists can communicate experimental results by writing in scientific j
Chapter 1 Assessment
(d) social science
(b) to test a hypothesis
(b) a model
(c) 10,000,000 watts
(b) conversion factor
(c) directly proportional
(c) circle graph
14. Suppose you perform an experimen