Matter and Mixtures

SEE IMAGE

• solid, liquid, gas
• solid, gas, liquid
• gas, solid, liquid
• liquid, gas, solid

A student measured the volume of a substance by measuring the length, width, and height. He then placed the substance in a larger container. The volume and the shape of the substance remained the same. What type of substance was he most likely obser 

• solid
• liquid
• gas
• vapor

A student filled the container shown with different beads to create a mixture. The beads are of various sizes and each one is made of either a light-weight plastic, glass, or iron. Which of the following best supports his claim that he created a mixture?

• The beads can be separated based on their properties
• The properties of the beads changed when they were mixed
• Once the beads were placed in the container they remained solid
• The beads were mixed so completely they became a solution

A student made a solution of salt, sugar, and water. When she stirred the mixture and the salt and the sugar seemed to disappear. The clear liquid remained. She measured the masses and included them in the chart, What is the most likely mass of the resulting solution?

• 5 grams
• 10 grams
• 50 grams
• 65 grams

A student performed the investigation below in which he dropped 2 alka-seltzer tablets into a glass of water. He weighed the tablets into a glass of water. He weighed the tablets and water before the investigation and the solution after the investigation. He found that the solution weighed less after the investigation than the tablets plus the water did before the investigation. What is the best explanation for his results?

• The solution weighed less because he did not weigh the gas that escaped
• The solution weighed less because some of the matter was destroyed
• The solution weighed less because some of the tablets dissolved
• The solution weighed less because some of the mass turned into energy

A student was asked to design a model for a mixture. Which of the following diagrams would make the best model of a mixture?

• a
• b
• c
• none of the above

The image attached are models that show the particles in 4 different materials. Which one of these diagrams is the best model for a solution?

• Model A because the particles are large enough to be seen
• Model B because the particles are small enough to go through filter paper
• Model C because the particles can separate easily
• Model B because the particles are all the same kind. 

A student made a solution by adding powdered drink mix to water. She tasted it and decided the solution was too concentrated. How could she make it less concentrated?

• add more drink mix
• add more water
• boil the solution
• freeze thee solution

The diagram shown is a model of 2 different sugar and water solutions. The small circles represent particles of sugar. What is the best claim that can be made from the evidence in the models.

• Solution A is more concentrated because it contains more solute
• Solution A is more concentrated because it contains more solvent
• Solution B is more concentrated because it contains more solute
• Solution B is more concentrated because it contains more solvent

A student designed an investigation to test how stirring would affect how sugar dissolves. Her experimental design is shown in image. What is manipulated (or independent) variable in this investigation?

• amount of water
• stirred or not stirred
• time
• temperature