
6th Grade Science 1st Semester
Quiz by Rosanne Volpert
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46 questions
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- Q1Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is –useful to human beings.a gas at room temperature.made of two different elements.given off by green plants.30s
- Q2Which of the following is the most abundant element in Earth’s crust?OxygenIronCalciumPotassium30s
- Q3A section of the Periodic Table of Elements is provided. What is the chemical symbol for magnesium?12MgMagnesium24.3130s
- Q4Compounds are different than elements because compounds are -a pure substance; elements are notmade from the same type of atomsnot able to be broken down into partscombinations of two or more elements30s
- Q5Which of the following three elements are most abundant in the plants and animals that make up the biosphere?Nitrogen, silicon, and oxygenOxygen, carbon, and hydrogenPhosphorous, oxygen, and ironSulfur, oxygen, and hydrogen30s
- Q6The oceans are primarily composed of which two elements?Calcium and siliconCarbon and hydrogenHydrogen and oxygenNitrogen and phosphorus30s
- Q7All of the following elements are major components of living things on Earth EXCEPT -sulfurnitrogenoxygencarbon30s
- Q8The atmosphere of Earth is comprised mostly of oxygen and -siliconcarbonnitrogenhydrogen30s
- Q9Bubbles and fizzing can be seen instantly when baking soda is mixed with vinegar. The bubbles are evidence of which of the following?A precipitate is formed when baking soda and vinegar are mixed.Baking soda dissolves in vinegar when they are mixed.A gas is formed when baking soda and vinegar are mixed.Vinegar turns into alcohol when it is mixed with baking soda.30s
- Q10When two substances are mixed, they might form a new substance. Which of the following would indicate that a new substance has been formed?The temperature of the mixture decreasesThe mass of the mixture increasesThe volume of the mixture increasesOne of the substances dissolves30s
- Q11A student mixes two clear liquids together. After a few minutes, a white powder can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids –have been stored too long and are no longer good.have combined to produce a new substance.are toxic and should be handled with extreme caution.were pure substances before they were mixed.30s
- Q12Which of the following characteristics is shared by all chemical reactions?Show a color changeRelease heat energyForm new substancesProduce a precipitate30s
- Q13All of the following are evidence of a chemical change EXCEPT –precipitate forms.change in state of matter.formation of a gas.color change.30s
- Q14The table shows the physical properties of four elements. Which element is classified as a metalloid?PoloniumTitaniumSeleniumPotassium30s
- Q15The table shows the classification and physical state of four elements. Which element most likely has a shiny luster?HydrogenCobaltArsenicCarbon30s