Matter: Properties and Changes(8.P1.1 and 8.P1.2)
Quiz by Michael Williams
Grade 8
Science
North Carolina Standard Course of Study
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20 questions
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- Q1If an element is malleable, ductile, and conductive of heat, which of the following is it most likely to be?Carbon (C)Copper (Cu)Sulfur (S)Iodine (I)60s8.P.1.2
- Q2Which statement about the reactivity of elements in a family is true?Reactivity increases as you go to the left in a familyReactivity increases as you go to the right in a familyReactivity increases as you go down through the familyReactivity increases as you go up through the family60s8.P.1.2
- Q3Sodium reacts easily with water. Which of the following elements is likely to react with water in the same way?Neon (Ne)Oxygen (O)Lithium (Li)Phosphorus (P)60s8.P.1.2
- Q4Which best explains how elements are arranged on the modern periodic table?Elements are arranged with number of protons decreasing from the left to rightElements are arranged with the most reactive elements at the topElements are arranged with the most metallic elements on the rightElements are arranged with number of protons increasing from left to right60s8.P.1.2
- Q5What is the difference between groups and periods on the periodic table?Groups go left to right while periods go up and downGroups contain non-metallic elements while periods contain metallic elementsGroups go up and down while periods go left to rightGroups contain metallic elements while periods contain non-metallic elements60s8.P.1.2
- Q6How are valence electrons related to reactivity?The closer the number of valence electrons is to 1 or 7, the higher the reactivityThe fewer valence electrons, the higher the reactivityThe more valence electrons, the lower the reactivityThe closer the number of valence electrons is to 3 and 4, the higher the reactivity60s8.P.1.2
- Q7Saltwater is a ______________________ because its parts can be separated by physical means such as filtration and evaporation.MixtureMoleculeCompoundElement60s8.P.1.1
- Q8When a drink mix is added to water and stirred so that the powder is all evenly spread out in the solution a _____________________________ is formed.Impure substancePure substanceHomogeneous mixtureHeterogenous mixture60s8.P.1.1
- Q9When you add heat energy to a liquid, what will happen to its molecules?They will slow down as it freezesThey will speed up as it evaporatesThey will slow down as it evaporatesThey will speed up as it freezes60s8.P.1.1
- Q10_____________ is the opposite process to evaporation because instead of turning liquids to gases, it turns gases to liquids.BoilingCondensationMeltingFreezing60s8.P.1.1
- Q11Which pair of elements has the MOST SIMILAR properties?Potassium and HeliumIodine and CalciumNitrogen and PhosphorusLithium and Boron60s8.P.1.2
- Q12Elements such as Carbon and Neon are __________________________ because they are not ductile, conductive, or malleable.MetalloidsNon-metalsTransition MetalsMetals60s8.P.1.2
- Q13What name is given to elements such as Iron (Fe) in groups 3 – 12 of the periodic table?Alkaline earth metalsTransition metalsNoble gasesAlkali metals60s8.P.1.2
- Q14Compounds and mixtures are DIFFERENT because:Compounds can only be separated by chemical reactions but mixtures must be separated by physical processesMixtures can only be separated by chemical reactions and compounds cannotCompounds and mixtures are the same thingCompounds can only be separated by physical processes and mixtures cannot60s8.P.1.2
- Q15Which of the following would be an example of a PURE SUBSTANCE?MilkPeanutsGoldAir60s8.P.1.2