1) A student wants to know how well four different kinds of cups can keep water hot. He labels four different cups P, Q, R, and S. The student then pours 10 mL of 45°C water into each cup and records the temperature of the water in each cup every 5 minutes for 20 minutes. What can be concluded from the investigation?   a) ACup S is a better insulator of heat than Cup P. b) BCup R is a better insulator of heat than Cup S. c) CCup Q is a better insulator of heat than Cup R. d) DCup P is a better insulator of heat than Cup R. 2) Rochelle wants to identify materials that are conductors or insulators of heat. She selects two identically sized cups made of two different materials and labels them Cup A and Cup B. Rochelle fills each cup with 100 mL of 60°C water. She records the temperature of the water in both cups every 5 minutes for 20 minutes. Based on Rochelle’s data, which statement is the best conclusion about the two cups?   a) ACups A and B are good insulators of heat. b) BCups A and B are good conductors of heat. c) CCup A is a better insulator of heat than Cup B. d) DCup A is a better conductor of heat than Cup B. 3) The diagram shows the parts of a thermometer. Which statement best explains how a thermometer works? a) AThe liquid in the thermometer expands when cooled. b) BThe liquid in the thermometer expands when heated. c) CThe glass cylinder expands when cooled. d) DThe glass cylinder expands when heated. 4) A student makes four packets of trail mix by mixing different ingredients in different amounts measured in grams.  Which packet of trail mix has the greatest mass? a) APacket 1 b) BPacket 2 c) CPacket 3 d) DPacket 4 5) A student adds an amount of water to a graduated cylinder. He adds a specific amount of liquid A and a specific amount of liquid B into the same graduated cylinder one after the other. The diagram shows the initial volume of water and the volumes of the mixtures that are formed. What volumes of liquid A and liquid B were added to the water in the graduated cylinder?. a) Aliquid A: 25 mL; liquid B: 35 mL b) Bliquid A: 5 mL; liquid B: 15 mL c) Cliquid A: 5 mL; liquid B: 10 mL d) Dliquid A: 25 mL; liquid B: 10 mL 6) The table lists the amounts of ingredients used to make four mixtures.  How should the mixtures be sequenced to show increasing order of mass? a) Amixture 4, mixture 1, mixture 3, mixture 2 b) Bmixture 1, mixture 3, mixture 2, mixture 4 c) Cmixture 3, mixture 1, mixture 4, mixture 2 d) Dmixture 3, mixture 4, mixture 1, mixture 2 7) A student labels three cups A, B, and C. He fills cup A with 50 g of iron filings and cup B with 50 g of sand. The student forms a mixture in cup C by adding 50 g of iron filings and 50 g of sand. Which statement is a correct comparison of the contents in the three cups?  a) AThe volumes of sand in cup B and cup C are different. b) BThe mass of the iron filings in cup C is more than the mass in cup A. c) CIron filings can be attracted by a magnet from cup A and from cup C. d) DIron filings can be attracted by a magnet from cup A but not from cup C. 8) Which statement is correct about mixtures? a) AMixtures formed with water can always be separated by condensation. b) BThe properties of the components of a mixture change after mixing. c) CWhen substances are mixed, the mixture forms a new substance. d) DThe properties of the components of a mixture remain the same. 9) Which question will lead to the formation of a hypothesis? a) AAre solutions a type of mixture? b) BWhat is the role of a solvent in a solution? c) CWhat methods are used to separate a solid that is dissolved in a liquid solution? d) DDoes the temperature of a solution affect the time it takes to dissolve more solute? 10) Which will not make a large block of sugar dissolve quicker in water? a) Astirring the sugar and water b) Bheating the water before adding the sugar c) Cbreaking the sugar into smaller pieces d) Dcooling the water before adding the sugar 11) A hiker prepares trail mix for a hiking trip by mixing ingredients in different amounts, as shown. The hiker weighs the trail mix on a balance. What would be the likely reading on the balance, and why? a) The reading will be greater than 840 g because when the ingredients are mixed, new ingredients Awith different masses are formed. b) The reading will be less than 840 g because when the ingredients are mixed, the particles come Bcloser together, and they occupy less space. c) The reading will be equal to 840 g because when the ingredients are mixed, the particles are Crearranged, but their masses remain the same. d) The reading will be equal to 840 g because when the ingredients are mixed, the particles join Dtogether to form a new substance with the same properties 12) A student performed an experiment to determine how water temperature impacts the time taken for an antacid tablet to dissolve. The student created the graph shown. Which variable should be placed on the x-axis, and why?  a) AWater temperature; it is the dependent variable. b) BWater temperature; it is the independent variable. c) CTime; it is the dependent variable. d) DTime; it is the independent variable 13) A closed jar contains 150 grams of ice in 300 grams of liquid water. After sitting for a while, half of the ice has melted. Which description of the mass is now correct? a) The mass of the ice is 0 grams, and the mass of the liquid water is 375 grams. b) The mass of the ice is 75 grams, and the mass of the liquid water is 375 grams. c) The mass of the ice is 75 grams, and the mass of the liquid water is 300 grams. d) The mass of the ice is 150 grams, and the mass of the liquid water is 300 grams. 14) What is the phase change from a solid directly to a gas called? a) Freezing b) Melting c) Sublimation d) Boiling 15) During a chemical reaction where baking soda and vinegar mix, what happens to the matter? a) It is conserved and just changes form b) New matter is created c) Some of it is destroyed d) It vanishes 16) What variable, temperature, stirring, or particle size, affects the dissolving rate most? a) All have significant effects b) Only stirring c) Only particle size d) Only temperature 17) In an experiment, sugar was added to tea. Did its physical properties change? a) Yes, the tea became sweet b) Yes, it became sour c) No, the tea remained the same d) No, properties don't change when sugar is added

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