“Unit Assessment Saving Our Seas with STEM: Matter and Energy SC 5.6A compare and contrast matter based on measurable, testable or observable physical properties, including mass, magnetism, relative density (sinking and floating using water as a reference point), physical state (solid, liquid, gas), volume, solubility in water, and the ability to conduct or insulate thermal energy and electric energy Students tested the physical properties of different objects and recorded their data in the table below. Properties of Matter Item Material Sink or Float in Water? Magnetic? fork metal sink yes ping-pong ball plastic float no marble glass sink no cork wood float no When comparing the properties of the items in the table, which TWO statements BEST describe the density of the items? The fork is less dense than water. The cork is less dense than the marble. The marble is more dense than the ping-pong ball. The ping-pong ball is more dense than water. Students have been asked to identify a material to use for an extension cord that will both insulate the wires, but allow the extension cord to be easily stored. Students investigated the physical properties of several materials. Their observations are recorded in the table below. Physical Properties Observed Material Observations wood Does not conduct electricity or heat, floats in water, not flexible copper Conducts electricity and heat, sinks in water, flexible steel Conducts electricity and heat, sinks in water, not flexible rubber Does not conduct electricity or heat, floats in water, flexible Based on the observations, what material should the students select that will insulate the wires AND allow the wires to be rolled up for storage? Use evidence from the data table to support your answer. Possible Answer: Students should select rubber because it does not conduct electricity. Students should select rubber because it is flexible. Students should select rubber because it does not conduct electricity and it is also flexible. Must answer rubber (Part 1) in order to get the 2nd point for Part 2 (correct evidence from data table.) If a different material is chosen, the student automatically gets a score of 0. Click on the rubric to access a printable page of multiple rubrics. Students observed the physical properties of the following substances. Sand Salt Iron Filings Joseph classified sand, salt, and iron filings together in the same group. Which two physical properties do these substances have in common that allow them to be classified together? Solubility Size Physical State Size Magnetism Physical State Solubility Magnetism 4. A science class was conducting an investigation about the properties of matter. They had seven different samples and had to identify the properties for the samples. The results of the investigation are shown in the table below. Properties of Matter Substance Physical State Mass (g) Mixed with Water Magnet Conducts Electricity 1 solid 78 sank to bottom attracted yes 2 solid 28 sank to bottom not attracted yes 3 solid 21 sank to bottom & no longer visible not attracted yes 4 solid 28 sank to bottom not attracted no 5 solid 19 floated on top not attracted no 6 liquid 39 floated on top not attracted no 7 liquid 58 no longer visible not attracted no Which of the tested substances is soluble in water? Substances 1, 2, and 4 Substances 3 and 7 Substances 5 and 6 Substance 7 only 5. A group of students designed an investigation to determine which material is the best insulator of thermal energy. They tested four different materials wrapped around the beaker of liquid and took the temperature of the liquid every 6 minutes. The results are shown in the table below. Material Starting Temperature (℃) 6 minutes (℃) 12 minutes (℃) 18 minutes (℃) A 38 34 31.5 27 B 38 36 34.0 32 C 38 37 33.5 30 D 38 35 32.5 29 Based on the data collected, which material is the best insulator over the 18 minutes? Material A Material B Material C Material D SC 5.6D illustrate how matter is made up of particles that are too small to be seen such as air in a balloon 6. Julie is exploring the physical properties of matter and recording her findings in the table below. Substance Color Physical State Texture Honey Golden, tan/brown Liquid Thick, sticky Based on Julie’s observations, how can she best illustrate the particles that make up her substance? Draw small particles spread out away from each other Draw small particles close to each other Draw small particles tightly packed against each other All of the above SC 5.6B demonstrate and explain that some mixtures maintain physical properties of their substances such as iron filings and sand or sand and water 7. Michael is working on a project. He collects 200 grams of sand and 20 milliliters of water. What will Michael observe when he mixes the sand and the water together? The physical properties of the sand and water do not change. The physical properties of the sand changes when mixed in water. The sand and water will form a clear solution. The sand will dissolve in the water forming a solution. 8. The pictures show tools that can be used for separating mixtures. magnet sieve hot plate coffee filter Drag and drop the best tool with the mixture that it can easily separate. iron filings and rice rocks and sand sugar and water pepper and water SC 5.6C compare the properties of substances before and after they are combined into a solution and demonstrate that matter is conserved in solutions 9. A student heats 250 milliliters of water in a cup to approximately 50°C and adds 6 grams of salt. The mixture of salt and water is then stirred for 15 seconds. Which results will the student most likely observe after the mixture has been stirred for 15 seconds? Select TWO correct answers. The salt will dissolve. The salt will sink to the bottom of the cup. The water will remain clear. The salt will float on top of the water. This question has two parts: Part A and Part B Reminder: Students must get Part A correct in order to receive credit for a correct answer in Part B. 10. Javier fills a container with 100 ml of water. He uses a digital scale to measure the mass of the beaker and the water. The mass of the beaker and water is 220 grams. He then adds 30 grams of sugar to the water, and mixes it together to form a solution. Part A Using the same digital scale, what would be the mass of the beaker with the solution he made? 120 g 190 g 250 g 350 g Part B Which statement provides the best evidence to support your answer in Part A? The sugar dissolves in the water so no longer has a mass. Matter is conserved in solutions. The mass of the beaker never changes. Water always maintains the same mass. come up with a study guide that focuses on answering thes questions”