Conservation of Matter - Student Edition PDF

Title: Conservation of [Student Edition] Name: Matter Directions: Read the passage below and answer the question(s) that follow Passage Water Formation Water Formation Water (H2O) is a compound required for survival by living organisms. The diagram below shows t...

Title: Conservation of [Student Edition] Name: Matter Directions: Read the passage below and answer the question(s) that follow Passage Water Formation Water Formation Water (H2O) is a compound required for survival by living organisms. The diagram below shows the chemical reaction of hydrogen gas (H2) with oxygen gas (O2) to form water (H2O). Illuminate Itembank™. Stop: You have finished the assessment. Question: 1 Question: 2 A student wants to draw a model of the chemical Choose the statement that BEST compares the reaction that forms water using circles to represent mass of the products to the mass of the reactants. the atoms. Which drawing shows the model that the student should make to represent this chemical The number of hydrogen atoms and reaction? oxygen atoms changes during the A. reaction, so the mass changes during the reaction. A. The number of hydrogen atoms and oxygen atoms changes during the B. reaction, but the mass does not change during the reaction. The number of hydrogen atoms and B. oxygen atoms is the same before and C. after the reaction, but the mass changes during the reaction. The number of hydrogen atoms and oxygen atoms is the same before and C. D. after the reaction, so the mass does not change during the reaction. D. Illuminate Itembank™. Stop: You have finished the assessment. Question: 3 Question: 4 Consider the chemical equation shown in the Item is not printable. passage. Which table correctly identifies the reactant(s) and the product(s)? Reactants Products A. H2 O2 H2O Reactants Products B. H2O O2 H2 Reactant(s) Product(s) C. H2 H 2O O2 Reactants Products D. H2 H2O O2 Illuminate Itembank™. Stop: You have finished the assessment. Question: 5 Question: 6 Like hydrogen, iron will also chemically react with Choose the correct statement that describes the oxygen to produce a new compound. The diagram chemical reaction that forms water. below shows the solid iron (Fe) and oxygen gas (O2) that react to create iron oxide (Fe2O3). Four molecules of hydrogen gas combine with two molecules of A. oxygen gas to form two molecules of water. Which model shows how these atoms rearrange to Two molecules of hydrogen gas create the product iron oxide (Fe2O3)? combine with two molecules of B. oxygen gas to form two molecules of water. A. Two molecules of hydrogen gas C. combine with one molecule of oxygen gas to form two molecules of water. B. Four molecules of hydrogen gas D. combine with one molecule of oxygen C. gas to form two molecules of water. D. Question: 7 Item is not printable. Illuminate Itembank™. Stop: You have finishedEnd the of Passage assessment. Directions: Read the passage below and answer the question(s) that follow Passage Kevin's Experiment Kevin's Experiment Kevin sets up a simple science experiment. He fills a test tube with sodium hydroxide solution. Then, he ties a string around the test tube and pulls it tight under the stopper of a flask containing a copper sulfate solution. When Kevin releases the string, the test tube falls into the copper sulfate solution and the two solutions combine. A diagram of the setup is shown. Illuminate Itembank™. Stop: You have finished the assessment. Question: 8 Question: 9 Kevin makes a chart in his lab notebook to record Which statement BEST explains the mathematical some information about the experiment. Which symbol you chose to complete the comparison in chart BEST provides information about the the previous question? reactants and products for this reaction? Some atoms are lost during a chemical reaction, which causes the A. A. mass of the flask after the reaction to decrease. B. The number and type of atoms in a chemical reaction are conserved, which causes the mass of C. B. the flask before the reaction and the mass of the flask after the reaction to be the same. D. The reactants and products are made of the same compounds, which C. causes the mass of the flask before the reaction and the mass of the flask after the reaction to be the same. Some atoms are gained during a chemical reaction, which causes the D. mass of the flask after the reaction to increase. Illuminate Itembank™. Stop: You have finished the assessment. Question: 10 Select the two statements that BEST describe Kevin's science experiment. The experiment shows an example of A. a chemical change. B. The mass of the products is 67.25 g. C. The mass of the products is 134.5 g. All of the products and reactants in D. the experiment are in the solid state. The experiment shows an example of E. a physical change. All of the products and reactants in F. the experiment are in the liquid state. End of Passage Directions: Read the passage below and answer the question(s) that follow Passage Burning Steel Wool Investigation Burning Steel Wool Investigation Jamie and Alexa are investigating physical and chemical reactions in a science class. They perform the experiment described in the steps below as part of their investigation. Burning Steel Wool Investigation Materials: Illuminate Itembank™. Stop: You have finished the – Fine steel wool assessment.  – 9-volt battery – Aluminum pan Procedure Steps: 1. Take a small piece of steel wool and form it into a loose ball. 2. Place the steel wool in the aluminum pan. 3. Lightly touch the positive and negative terminals on the battery to the steel wool. 4. Gently blow on the steel wool to get the reaction to occur more quickly. The battery in the investigation provides an electrical current that heats up the steel wool, allowing it to burn. The equation for the reaction of steel wool burning is: 4Fe(s) + 3O2(g) → 2Fe2O3(s) The table shown below provides information about the steel wool and the iron oxide formed from burning the steel wool. Substance Melting Point Boiling Point Steel Wool Fe(s) 2,795°C 4,982°C Iron Oxide (Fe2O3) 1,460°C 1,565°C Question: 11 Question: 12 Item is not printable. Item is not printable. End of Passage Directions: Read the passage below and answer the question(s) that follow Passage Gumdrop Models Illuminate Gumdrop Models Itembank™. Stop: You have finished the assessment. Gumdrop candies and toothpicks are used to model atoms and molecules. Three different colored gumdrops are used to represent atoms of oxygen, hydrogen, and carbon. The toothpicks represent the bonds between the atoms. The picture shows the supplies and how they can be used to create models. Illuminate Itembank™. Stop: You have finished the assessment. Question: 13 Question: 14 The following question has two parts. First, Item is not printable. answer Part A. Then, answer Part B. Part A: Models of molecules are shown. Which two models show the same molecules? Model A and Model C Model B and Model F Model B and Model D Model C and Model E Part B: Which statement BEST explains why the two models in Part A show the same molecule? The models have the same types of Illuminate Itembank™. Stop: You have finished the atoms but in different proportions. assessment.  The models have the same types of atoms that are in the same proportions. The models have the same total number of atoms but different types of atoms The models have the same total number of atoms and the same number of bonds. Question: 15 Question: 16 Which THREE models show a molecule? A model is shown. A. Which statement BEST describes the model? B. The model shows a single atom that A. is made of two molecules. C. The model shows a single molecule B. that is made of two atoms. D. The model shows a single atom that C. is made of three molecules. E. The model shows a single molecule D. that is made of three atoms. F. Illuminate Itembank™. Stop: You have finishedEnd of Passage the Directions: Read the passage below and answer the question(s) that follow assessment. Passage Reacting Zinc and Hydrochloric Acid Reacting Zinc and Hydrochloric Acid A science teacher demonstrates what happens when zinc is added to hydrochloric acid (hydrogen chloride dissolved in water). To set up the demonstration, she first attaches a test tube to a stand and fills the test tube with hydrochloric acid. Next, she places a soap solution in a dish nearby. She places a stopper on top of the test tube. The stopper contains a glass tube that leads from the test tube to the soap solution. The picture shows the setup. Next, the teacher adds zinc granules to the test tube and places the stopper back on top. First, bubbles are seen forming in the liquid in the test tube. Next, bubbles form in the soap solution. The teacher notes that the previously room-temperature test tube has become very warm to the touch. As the bubbles leave the soap solution, the teacher holds a candle nearby. When the bubbles filled with hydrogen are near the flame, the heat initiates a reaction between the hydrogen in the bubbles and the oxygen in the surrounding air. The bubbles immediately catch fire and release a loud popping sound. The picture shows the bubbles. Illuminate Itembank™. Stop: You have finished the assessment. The teacher provides her class with the two chemical reactions that took place and a table that shows various properties of the substances involved in the reactions. The two equations and the table are shown. Zn + 2HCl → ZnCl2 + H2 2H2 + O2 → 2H2O State at Room Appearance at Soluble Substance Flammable? Temperature Room Temperature in Water? Hydrogen Gas Colorless Yes Very little Colorless, but will Hydrogen Gas turn dense white if No Yes Chloride exposed to air Oxygen Gas Colorless No Very little Water Liquid Clear No ----- Silvery-white metal Zinc Solid Yes No with blue tinge Zinc Solid White crystalline No Yes Chloride Illuminate Itembank™. Stop: You have finished the assessment. Question: 17 Question: 18 The students are creating models of the Item is not printable. substances involved in the reaction. Which model correctly represents ZnCl2? A. B. C. D. Illuminate Itembank™. Stop: You have finished the assessment. Question: 19 Question: 20 The students are creating models of the A table is being created to represent the atoms in substances involved in the reaction. Which model the reaction between zinc and hydrogen chloride. correctly represents 2HCl? Type the numbers to complete the table. Reactants P A. C at B. Chlorine atom(s) H Hydrogen atom(s) at C. 1 Zinc atom(s) Z at D. End of Passage Directions: Read the passage below and answer the question(s) that follow Passage Molecular and Atomic Models The periodic table is shown. Illuminate Itembank™. Stop: You have finished the assessment. The image shows how balls and sticks can be used to model elements and molecules. Question: 21 Question: 22 Item is not printable. Item is not printable. Illuminate Itembank™. Stop: You have finished the assessment. Question: 23 Question: 24 Using the balls and sticks in the passage, identify Item is not printable. the model that shows water, H2O. A. B. C. D. Illuminate Itembank™. Stop: You have finished the assessment. Question: 25 The model shows a molecule of ethane. Ethane is made up of two different types of atoms. Select the TWO models that correctly illustrate the atomic structure of the atoms that make up ethane. A. B. C. D. Illuminate Itembank™. Stop: You have finished the assessment. E. F. End of Passage Illuminate Itembank™. 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