Diffusion and Brownian Motion Quiz

What is diffusion?

• Diffusion is the process of separating substances based on their density.

• Diffusion is the movement of particles in a circular motion within a confined space.

• Diffusion is the movement of particles from an area of low concentration to an area of high concentration.

• Diffusion is the movement of particles from an area of high concentration to an area of low concentration.

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NGSS.MS-LS2-3

Which of the following is an example of diffusion in liquids? A) Sugar dissolving in water B) Balloon deflating C) Helium spreading in a room D) None of the above

• A) Sugar dissolving in water

• B) Balloon inflating

• D) All of the above

• C) Helium sinking in a room

What factors affect the rate of diffusion in gases?

• The phase of the gas

• The factors that affect the rate of diffusion in gases include temperature, molecular weight, and the pressure difference between the two areas of diffusion.

• Distance between the gas particles

• Color of the gas

What is Brownian motion?

• Brownian motion is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving atoms or molecules in the gas or liquid.

• Brownian motion is the movement of particles caused by the rotation of the Earth

• Brownian motion is the result of particles being attracted to each other and moving in a coordinated manner

• Brownian motion is the movement of particles in a straight line without any deviation

What causes Brownian motion?

• Brownian motion is caused by the rotation of the Earth

• Brownian motion is caused by the gravitational pull of the moon

• Brownian motion is caused by the random movement of particles in a fluid, which is due to collisions with the molecules of the fluid.

• Brownian motion is caused by electromagnetic forces between particles

Which scientist first observed Brownian motion?

• Robert Brown

• Isaac Newton

• Marie Curie

• Albert Einstein

What is the main difference between diffusion in liquids and diffusion in gases?

• Diffusion in liquids is generally faster than diffusion in gases

• Diffusion in liquids and gases occur at the same speed

• Diffusion in liquids and gases do not involve movement of particles

• The main difference is that diffusion in liquids is generally slower than diffusion in gases due to the higher density and closer proximity of particles in liquids.

How does temperature affect the rate of diffusion?

• An increase in temperature decreases the rate of diffusion, as the particles have less energy and move more slowly.

• An increase in temperature generally increases the rate of diffusion, as the particles have more energy and move more quickly.

• A decrease in temperature generally increases the rate of diffusion, as the particles have less energy and move more slowly.

• Temperature has no effect on the rate of diffusion.

What is the formula to calculate the rate of diffusion?

• The formula to calculate the rate of diffusion is (mass) / (volume)

• The formula to calculate the rate of diffusion is (temperature) * (time)

• The formula to calculate the rate of diffusion is (distance) / (time)

• The formula to calculate the rate of diffusion is (change in concentration) / (time)

What are the practical applications of diffusion and Brownian motion in everyday life?

• Se utilizan para la fabricación de teléfonos móviles

• Son útiles para la preparación de alimentos en la cocina

• Las aplicaciones prácticas de la difusión y el movimiento browniano en la vida cotidiana incluyen la dispersión de olores en una habitación, la difusión de tintes en el agua, y el movimiento aleatorio de partículas en un líquido.

• La difusión y el movimiento browniano se utilizan para predecir el clima