Lesson 19: ACT Science Mastery

Lesson 19: ACT Science Mastery

Passage

In his science fair experiment, a student focused on student health at his high school. He collected urine samples from 4 student volunteers both in the morning and in the evening. The samples were then analyzed. Table 1 and Table 2 show the volume, coloration, specific gravity, and the concentration of suspended of solid of the morning and evening urine samples respectively.

Passage cont.'d

The formula used for specific gravity was as follows:

Specific gravity = density of sample/ density of water.

The normal range for the specific gravity of urine is 1.001 -1.035

Multiple Choice

What statement is false about the urine samples in Table 1?

• The volumes range from 125 mL to 420 mL.

• The specific gravities range from 1.005 to 1.029.

• As the volume increases, the specific gravity uniformly decreases

• Only one sample had a specific gravity less than 1.01.

Multiple Choice

What statement is false about the urine samples in Table 2?

• The volumes range from 140 mL to 450 mL.

• The colors range from 0 to 4.

• The specific gravities range from 1.001 to 1.025

• The largest sample was taken from Student C.

Multiple Choice

Based on the results provided, as the concentration of suspended solids increases, the specific gravity of the urine generally:

• increases

• decreases

• stays the same

• none of the above

Multiple Choice

Based on the results provided, as the volume of the urine increases, the specific gravity of the urine:

• increases

• decreases

• stays the same

• none of the above

Multiple Choice

Based on the evidence compiled in Tables 1 and 2, which statement is most likely to be correct?

• People urinating in volumes greater than 400 mL typically have a higher concentration of suspended solids in their urine.

• Urine with a higher specific gravity tends to darker than urine with a lower specific gravity

• Urine with a lower specific gravity tends to be darker than urine with a higher specific gravity

• People urinating in volumes smaller than 200 ml typically have a lower concentration of suspended solids in their urine.

Multiple Choice

Which statement is false concerning the difference between the morning and evening urine samples?

• The students' urine samples each had a darker color in the evening than in the morning.

• The students' urine samples each had a lower sus pended solids concentration in the evening than in morning.

• The students' urine samples each had a lower specific gravity in the evening than in the morning

• The students each provided larger urine samples in the evening than in the morning,

Multiple Choice

A urine sample from Student E is taken and is found to have 85.42 g/L of suspended solids. What is the most likely specific gravity of this sample?

• 1.025

• 1.014

• 1.032

• 1.001

Multiple Choice

Define Deposition:

• a substance that is naturally deposited somewhere.

• something which can be dissolved into another liquid or aqueous solution.

• a state where one liquid is suspended in another but the two liquids would not dissolve in one another.

• to find the exact cause and explanation of an event, phenomena, result (in an experiment), etc.

Multiple Choice

Define Determine:

• the amount of time it takes for molecules or atoms of a material to spread from an area of high concentration to an area of lower concentration

• something which can be dissolved into another liquid or aqueous solution.

• a state where one liquid is suspended in another but the two liquids would not dissolve in one another.

• to find the exact cause and explanation of an event, phenomena, result (in an experiment), etc.

Multiple Choice

Define Diffusion time:

• the amount of time it takes for molecules or atoms of a material to spread from an area of high concentration to an area of lower concentration

• something which can be dissolved into another liquid or aqueous solution.

• a state where one liquid is suspended in another but the two liquids would not dissolve in one another.

• to find the exact cause and explanation of an event, phenomena, result (in an experiment), etc.

Multiple Choice

Define Distinguish:

• the amount of time it takes for molecules or atoms of a material to spread from an area of high concentration to an area of lower concentration

• something which can be dissolved into another liquid or aqueous solution.

• a state where one liquid is suspended in another but the two liquids would not dissolve in one another.

• to treat something or recognize it as different.

Multiple Choice

Define Dissoluble:

• the amount of time it takes for molecules or atoms of a material to spread from an area of high concentration to an area of lower concentration

• something which can be dissolved into another liquid or aqueous solution.

• a state where one liquid is suspended in another but the two liquids would not dissolve in one another.

• to treat something or recognize it as different.