A student wants to make sure a sugar solution becomes saturated. Which procedure would be most appropriate?add sugar until no mre sugar can dissolve, add sugar until no more sugar can dissolve, add only a very small amount of sugar, remove all sugar from the water, filter the sugar before adding it to water., What is the term for a substance that can dissolve in a given solvent?, Insoluble, Soluble, Residue, Filtrate, A saltwater solution is left undisturbed overnight, but no salt settles at the bottom. What property of a solution does this demonstrate?, Solutions are unstable, Solute particles settle quickly., Solutions are stable and remain evenly mixed., Solutions can always be separated by filtration., Which of the following best describes a solution?, a heterogeneous mixture, a homogeneous mixture, a mixture with visible particles, a mixture that always settles, A student wants to prove that a solution is unsaturated. What should the student do?, Remove the solvent, Filter the solution using filter paper., Add more solute and observe if it dissolves, Leave the solution undisturbed and wait for it to settle., Two students added salt to separate cups containing the same amount of water. In cup A, all the salt dissolved. In Cup B, some salt remained at the bottom. Which conclusion is best?, Both solutions are unsaturated., Both cups contain heterogeneous mixture., Cup A is saturated while Cup B is unsaturated., Cup A can still possible dissolve more solute, while Cup B has reached its maximum capacity., Why are solute particles not visible to the naked eye in a solution?, they are too tiny, they float on top, they change into water, they disappear completely, A beaker containing a clear solution has a single seed crystal of solute added to it. Instantly, rapid crystallization occurs throughout the beaker. What was the initial state of the solution?, saturated, heterogeneous, unsaturated, supersaturated, In a solid- liquid solution made by dissolving table salt in water, what role does water play?, Solute, Solvent, Colloid, Suspension, All of the following describes a solution EXCEPT:, Clear, Homogeneous, Cannot pass through filter paper, Can be separated by physical means, Which situation shows the best evidence that a solution has formed?, The solute mixes evenly and cannot be seen., The liquid becomes cloudy with particles., The solid settles in the bottom, The mixture separates into layers., A student mixed salt with cooking oil. The salt settled at the bottom. What is the best explanation?, Salt is soluble in oil., Oil is the best solvent., Salt is insoluble in oil., The oil became the solute., Anna mixed sugar with water until the sugar disappeared. Which statement is correct?, Sugar is the solvent., Water is the solute., Sugar dissolved in water., Water became a solid, A student measured the length of a pencil using kilograms. What was the mistake?, wrong tool, wrong unit, wrong object, wrong color, Why is water often called the 'universal solvent'?, Because it has no taste or smell, Because it can dissolve many different substances, Because it is a liquid at room temperature, Because it is abundant on Earth, In a solution, what do we call the substance that is present in the smaller amount and gets dissolved?, Mixture, Solute, Solvent, Suspension, If a pharmacist mixes a small amount of powdered medicine (Ingredient X) into a large volume of sterile water, which component is acting as the solute?, The container used for mixing, The powdered medicine (Ingredient X), The resulting liquid medication, The sterile water, In a solution, what is the component that is typically present in the larger amount and responsible for dissolving other substances?, mixture, precipitate, solute, solvent, Which statement BEST describes why scientists use models?, To replace all experiments and observations., To prove that every explanation in science is final and cannot change., To make scientific ideas look attractive even if they are not based on evidence., To explain or represent phenomena that are too small, too big, too fast, or difficult to observe directly., A class cannot see air particles moving inside a balloon. The teacher uses small moving dots in a box to represent them. What is reason for using this model?, It shows the exact color and shape of real air particles., It removes the need to compare the model with evidence., It proves that air particles stop moving inside the balloon., It lets students infer what happens to particles that cannot be directly seen., A learner says, “A model is useful only if it looks exactly like the real object.” Which response is MOST scientifically accurate?, Incorrect, because models should never be revised., Correct, because a model must copy all features of reality., Correct, because models are not useful unless they are the same size as the real object., Incorrect, because a model is useful when it represents important features and helps explain evidence, even if it is not exact., Which idea is part of the Particle Model of Matter?, Only solids have particles., Matter is made of tiny particles., Particles exist only when matter is heated., Pure substances contain many unrelated kinds of particles., Which of the following is an element?, oxygen, salt, sugar, water, What generally happens to particle motion when temperature increases?, Particles move faster., Particles stop moving., Particles change into a new pure substance immediately, Particles lose all spaces between them., Which state of matter has particles that are usually closely packed in a fixed arrangement?, Gas, Liquid, Solid, Plasma, What happens to the particles of a substance during melting?, Gain energy and move faster, Lose energy and move slower, Don’t change their energy or arrangement, Change their arrangement but not their speed, What is the change of state from liquid to solid called?, melting, freezing, evaporation, condensation, What happens to the particles as a gas cool down and condenses?, Gain energy and move faster., Gain energy and move slower., Lose energy and move closer together., Lose energy but maintain the same spacing., What is the initial and crucial step when starting a scientific investigation?, Listing all possible results, Analyzing previous research, Identifying the specific problem or question, Forming a preliminary conclusion, In a scientific investigation, what term refers to the objective observations and numerical measurements recorded during the experiment?, Data, guesses, opinions, theories

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