Understanding Viscosity

Hey Choen and Sam, can you guess? A fluid with a high viscosity will have ______ internal friction. Let's see who gets it right!

Answer explanation

A fluid with high viscosity has more internal friction, meaning it resists flow. Therefore, the correct answer is 'more', as high viscosity indicates greater internal resistance.

Hey Isabella, can you dive into the world of gases and explain how pressure plays a role in changing their viscosity? Pressure (a)   the viscosity of gases by reducing the distance between molecules, leading to more collisions.

• Pressure decreases the viscosity of
• Pressure increases the viscosity of
• Viscosity of gases is unaffected by
• Higher pressure leads to gases beco

Answer explanation

Pressure increases the viscosity of gases because it reduces the distance between molecules. This leads to more frequent collisions, which increases resistance to flow, making the gas more viscous.

Match the following factors with their effects on viscosity:

• Effect of lower pressure on viscosity.

• Lower pressure decreases viscosity

• Effect of higher temperature on viscosity.

• Higher temperature increases viscosity

• Effect of temperature and pressure on viscosity.

• Adding salt decreases viscosity

• Effect of adding salt on viscosity.

• Temperature decreases viscosity, pressure increases viscosity.

Answer explanation

Temperature decreases viscosity because higher temperatures allow molecules to move more freely, reducing resistance. Conversely, pressure increases viscosity by forcing molecules closer together, making it harder for them to flow.

Hey Zada, can you fill in the blank? The volumetric flow rate is the volume of a fluid passing a point in a system per ______. Let's see if you can get it right!

Answer explanation

The volumetric flow rate measures the volume of fluid passing a point in a system per unit time. This means it quantifies how much fluid flows through a specific point over a defined time period.

Hey Tatum and Isabella, can you dive into the world of science and explain how viscosity is measured? Viscosity is measured using (a)   , such as capillary and rotational viscometers.

• Viscosity is determined by temperat
• Viscosity can be calculated using a
• Viscosity is measured using viscome
• Viscosity is measured in liters per

Answer explanation

Viscosity is measured using viscometers, which are specialized instruments like capillary and rotational viscometers. These devices help quantify a fluid's resistance to flow, making them essential for accurate viscosity measurement.

Hey Madison, can you guess this? Spoiled milk has a ______ viscosity than fresh milk because of all those tiny suspended particles. What do you think?

Answer explanation

Spoiled milk has a higher viscosity than fresh milk due to the presence of tiny suspended particles, which increase resistance to flow. Therefore, the correct choice is 'higher'.

Hey Emile, Taylor, and Landon! Can you dive into the sticky world of honey and explain why it flows more slowly than water? 🐝

• Honey is a solid at room temperature.

• Honey flows more slowly than water because it has a higher viscosity.

• Honey is made from sugar and water.

• Honey is less dense than water.

Answer explanation

Honey flows more slowly than water because it has a higher viscosity. Viscosity measures a fluid's resistance to flow; honey's thicker consistency makes it flow slower compared to the more fluid nature of water.

Hey science explorers! Keland and Zada are curious about a fluid's secret superpower. Viscosity is (a)   .

• A measure of a fluid's temperature.

• A measure of a fluid's resistance t

• A measure of a fluid's colour.

• A measure of a fluid's density.

Answer explanation

Viscosity measures a fluid's resistance to flow. It indicates how thick or sticky a fluid is, which affects how easily it moves. The correct choice highlights this property, distinguishing it from temperature, color, or density.

Dheniel and Tatum are having a debate: (a)   is more viscous than water. Can you help them figure it out?

• Air

• Gasoline

• Honey

• Milk

Answer explanation

Honey is more viscous than water due to its higher density and thicker consistency. In contrast, air, gasoline, and milk have lower viscosities compared to water, making honey the correct choice.

Emile and Grayson are in a science lab, experimenting with different liquids. They wonder, the relationship between molecule size and viscosity is (a)  

• Larger molecules increase viscosity

• Smaller molecules increase viscosit

• Molecule size has no effect on visc

• Larger molecules decrease viscosity

Answer explanation

Larger molecules tend to entangle more and resist flow, leading to increased viscosity. Therefore, the correct relationship is that larger molecules increase viscosity.