Extra Credit Quiz: Unit 2.2/2.3 Exam Review

Which layer has the greatest density in the density tower?

• Alcohol

• Vegetable Oil

• Water

• Corn Syrup

Answer explanation

Corn syrup has the greatest density among the options listed. In a density tower, denser liquids sink below less dense ones, placing corn syrup at the bottom due to its higher density compared to alcohol, vegetable oil, and water.

All samples of a given element have the same ______.

• Size

• Color

• Properties

• Weight

Answer explanation

All samples of a given element have the same properties because they consist of identical atoms, which exhibit consistent chemical and physical characteristics. Size, color, and weight can vary based on sample conditions.

Which substance has the lowest density in the density tower?

• Alcohol

• Vegetable Oil

• Water

• Corn Syrup

Answer explanation

Alcohol has the lowest density among the given substances, making it less dense than vegetable oil, water, and corn syrup. This is why it floats on top in a density tower.

Tags

NGSS.MS-PS1-2

If a substance has a density of 0.7 g/ml, it will float on top of the ______ layer.

• Alcohol

• Vegetable Oil

• Water

• Corn Syrup

Answer explanation

A substance with a density of 0.7 g/ml will float on liquids with a higher density. Since alcohol has a density lower than 0.7 g/ml, it will float on top of alcohol, making it the correct choice.

Tags

NGSS.MS-PS1-2

The layer with the lowest density is on the ______.

• Top

• Middle

• Bottom

• Side

Answer explanation

The layer with the lowest density is typically found at the top, as less dense materials rise above denser ones. Therefore, the correct answer is 'Top'.

Which of the following is a property of density?

• It changes with color

• It changes with size

• It remains constant regardless of sample size

• It changes with shape.

Answer explanation

Density is an intensive property, meaning it does not change with the amount of substance present. Therefore, it remains constant regardless of sample size, making this the correct choice.

What is the density of acrylic if its mass is 17.3 g and volume is 15.6 ml?

• 1.1 g/ml

• 1.2 g/ml

• 1.3 g/ml

• 1.4 g/ml

Answer explanation

To find the density, use the formula: density = mass/volume. Here, density = 17.3 g / 15.6 ml = 1.107 g/ml, which rounds to 1.1 g/ml. Thus, the correct answer is 1.1 g/ml.

What is the unit of measurement for the volume of a solid?

• mL

• cm³

• L

Answer explanation

The volume of a solid is commonly measured in cubic centimeters (cm³). While milliliters (mL) and liters (L) are also units of volume, cm³ is specifically used for solids. Therefore, cm³ is the correct choice.

In a sugar-water solution, sugar is the:

• A) Solvent

• B) Solute

• C) Compound

• D) Mixture

Answer explanation

In a sugar-water solution, sugar is the solute because it is the substance that is dissolved in the solvent (water). Therefore, the correct answer is B) Solute.

The substance that dissolves in a solvent is called the:

• Solvent

• Solute

• Mixture

• Compound

Answer explanation

The substance that dissolves in a solvent is called the solute. In a solution, the solute is the component that is dissolved, while the solvent is the substance that does the dissolving.