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8th grade Science Final Exam
Terms in this set (100)
What are the step-by-step procedures of scientific problem solving called?
What is a testable predication in an experiment called?
What is the first step taken when designing an experiment?
state the problem
What do you call an explanation of an observation?
What is changed in an experiment to try to change the dependent variable?
What is the last step in an experiment?
Why should an experiment be repeated?
To reduce chance of error
What is the SI unit for mass?
What would you use to measure the length of a table?
What is the SI unit for measuring volume?
What would you use to measure temperature?
What is anything that has mass and takes up space?
Who discovered that atoms had a nucleus?
Energy levels of atoms are occupied by _____.
In _____, the atomic number decreases by two.
Carbon has an atomic number of 6. If carbon's mass is 14, how may neutrons are there?
If an atom had 3 electrons, 3 protons, and 7 neutrons, what would be the atom's mass number?
Na+, what does this symbol tell us?
Who was the first person to create the idea of the periodic table?
The modern day periodic table is arranged according to what?
What does the atomic number of an element mean?
the number of the protons in the nucleus
Who arranged the periodic table as we know it today?
The majority of the elements on the periodic table are _____.
Luster is the ability to ______.
How many groups can be found on the modern day periodic table?
How many periods are on the periodic table?
Between the metals and the nonmetals, what can be found?
What type of element best conducts electricity?
What type of element makes the best insulator?
A semiconductor is usually made from _____.
The elements in group 1 are referred to as _____.
All the elements in group 1 are metals except for _____.
What is the name given to elements in group 2?
Alkaline earth metals
What are the elements in groups 3-12 called?
What are elements that have no metallic properties called?
What is the most common element in the universe?
What are the elements in group 17 called?
What are the elements in group 18 called?
What type of radioactive decay DOES NOT change an element into another element?
Who was NOT a developer of the atomic model? Dalton, Rutherford, Planck, or Thomson
The first periodic table was arranged according to what?
What is the element name for H?
What is the element name for He?
What is the element name for K?
What is the element name for Na?
What is the element name for Fe?
What is the element name for O?
What is the element name for Kr?
What is the element name for Zn?
What is the element name for S?
What is the element name for Hg?
What is the element name for Ne?
What is the element name for Ni?
What is the maximum number of electrons in the second energy level?
Aluminum oxide is a chemical formula with 2 AI, and 3 O. How is this formula written?
How many dots are in an electron dot diagram for carbon, in group 14?
In the compound H2O, how many atoms are there altogether?
In the compound, C13H16N2O5, which element has the greatest number electrons represented?
All the elements in group 18 are in what state of matter?
What is a charged atom that has gained one or more electrons called?
What type of bond is formed when a positive ion and a negative ion join together?
What is a substance that contains two or more elements called?
A bond in which electrons are shared is called a _____ bond.
What is the main diet of the coral?
What do corals need so that the zooxanthellae can conduct photosynthesis?
Corals use their _____ to capture food.
What types of mangroves can tolerate the seawater the best?
In a shark's anatomy, what is the largest internal organ?
What kingdom do corals belong to?
What are the two types of coral generally seen in the Florida Keys?
hard and soft
A neutral solution has a ph of _____.
Which is an example of a substance? Air, lemonade, soil, water?
Which is an example of a mixture? Air, water, gold, carbon dioxide?
Which of the following items is a base? Vinegar, soap, orange juice?
Which item is an acid? Antacid, water, lemons?
Evaporation, a physical change, could be used to separate the components of a _____.
3 examples of a heterogeneous mixture:
3 examples of a homogeneous mixture:
The more hydronium ions in a substance the more ____ the substance is
A substance with a pH of 8 or higher is considered a ___
A substance with a pH of 5 or stronger than a substance with a pH of 2? True or False
The more hydroxide ions a substance has than hydroniom ions the more ___ the substance is
Gold, silver, and iron are considered ____ or ____
Metals or elements
Water, carbon dioxide, and sodium chloride are considered ___
Substances with pH 1 can
Burn soft tissue
Substances with pH 5 can be
Substances with pH 8 can be used for
Lemonade is categorized as a _____ or ____
Homogeneous mixture or solution
List three materials that would make good insulators:
List three materials that would make good conductors
The unit of measure for pressure is _____.
Fluids from layers based on their _____.
Archimedes' principle addresses _____.
Which substance can occupy different volumes, depending on the container?
The fore that opposes the motion of an object through a fluid is called _____.
The unit of measure for force is _____.
As a diver goes deeper into the ocean, what happens to the buoyant force?
there is no change
Which principle describes: the pressure of a fluid decreases when the speed of that fluid increases?
What increases as elevation decreases on Earth's surface?
A book is dropped on a closed bottle of ketchup. What principle is being applied?
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