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WorksheetsIAPS End of Unit B Review
Total questions: 15
Worksheet time: 17mins
Ms. Langsdale masses a sample of playdough on a balance. She successfully creates it into the shape of a sphere, a cube, and a flat circle massing the playdough after each creation. Which playdough creation will have the greatest mass?
sphere
cube
Flat circle
The mass will be the same for all
In the chemical reaction below, how many different elements are used on the product side the equation?
1 element
2 elements
3 elements
4 elements
In the chemical reaction below, what is the total number of atoms on the product side the equation?
7 atoms
24 atoms
36 atoms
42 atoms
Copper is a reddish-brown metal that is an excellent conductor. Copper tarnishes and becomes black when exposed to air and light. The density of copper is 8.96 g/cm3 . The melting point is 1,085oC and the boiling point is 2562oC. Check all of the physical properties of copper.
tarnishing
melting point
boiling point
density
A chemical reaction occurs in a closed system. What conclusion can you make about the mass of the substances involved before and after the reaction?
The mass will not change
The mass will go down because some gas will escape
The mass will go up because some gas will escape
The mass will go up because new substances will be made
Check all statements below that describe chemical reactions.
Solid Zinc is dropped into hydrochloric acid and a gas is produced
Liquid sodium hydroxide and liquid copper chloride are mixed together and a solid forms at the bottom of the container
A sample of solid elemental sodium is dropped into water and an explosion occurs
A puddle evaporates on a hot Florida day
Sam wants to test the effect that different concentrations of acid will have on the dissolution of a particular kind of candy. As she sets up and completes her experiment, which of the following experimental designs would be most likely to help her answer her question?
Allow several pieces of candy to soak in different amounts of acid of a single concentration and then measure the amount of dissolution on each.
Prepare solutions of different acid concentrations, measure 50 milliliters of each into different beakers, and place the same number and type of candy into each of the beakers.
After allowing a piece of candy to be exposed to one acid concentration, place it in different acid concentrations, and then measure the surface area that is dissolved.
Prepare solutions of different acid concentrations, measure 50 milliliters of each into different beakers, and place different types and amounts of candies into the beakers.
Barry is convinced that he discovered a new element after only one experiment, but he is frustrated that the Science Journal would not publish his work. What advice could you provide Barry to get his work published in the future?
Conduct multiple trials to verify his findings (repetition)
Add more data tables and graphs to his report
Scrap the whole idea and start over
Send an email to a well respected scientist asking if they will publish the findings under their name
Lucas used a computer simulation to build different types of molecules. He used a computer simulation because real molecules are too small to see and the simulation is a simple representation for a complex concept. The computer simulation was used as
scientific models
experimentation
claim, evidence, and reasoning statements
Manipulatives to help develop motor skills
How do science and society interact? Check all that apply.
Science and society do not interact.
Society can drive scientific research by providing support and funding opportunities for projects that are considered important by decision makers.
Science can affect society by providing new technologies and advancements to meet the needs of society.
What is an atom?
The biggest particle in an element
The smallest particle in a molecule
The smallest particle in an element
The smallest particle in a mixture
Iron combines with oxygen in the air to form reddish-brown iron oxide, also known as rust (FeO2). How would you classify this oxide?
element
compound
mixture
all of the above
Alkali metals are in column 1 of the periodic table. What property do they share? Check all that apply.
Each element has 1 proton
Each element has 1 electron
Each element has 1 valence electron
Each element has an atomic mass of 1
Fluorine (Fl), Chlorine (Cl), Bromine (Br), and Iodine (I) are all in the same column of the periodic table. Why are these elements in the same column of the periodic table? Check all that apply.
They are the same size
They react with each other
They have similar properties
They have the same number of protons
Which statement correctly describes an element based on its position in the periodic table?
Element Y is a Noble Gas that will lose electrons to form compounds
Element Z is a halogen with 7 valence electrons
Element W is a reactive alkaline earth metal
Element X will lose electrons and form a negative ion
