Exploring Diffusion and Osmosis Concepts

The video tutorial explains the concepts of diffusion and osmosis, highlighting their differences and providing examples from daily life. Diffusion is described as the movement of molecules from a high concentration region to a lower concentration region, occurring naturally without energy. Common misconceptions, such as confusing wind movement with diffusion, are addressed. Osmosis is introduced as a special type of diffusion involving water molecules moving through a semi-permeable membrane from a dilute to a concentrated solution. Examples of osmosis in nature, such as water absorption in plants and fish, are provided.

What is the process called when molecules move from a region of high concentration to a region of low concentration?

• Evaporation

• Diffusion

• Osmosis

• Condensation

In the example given, how many molecules of oxygen gas move from region X to region Y?

• 8

• 6

• 4

• 2

Does diffusion require any external energy to occur?

• Yes, it requires a lot of energy

• It depends on the type of molecules

• No, it does not require any external energy

• Yes, it requires a small amount of energy

Which of the following is NOT an example of diffusion?

• Smell of perfumes spreading

• Movement of helium balloons

• Opening a soda can

• Breathing (inhalation and exhalation)

What is osmosis?

• The movement of water molecules from high to low concentration

• The movement of gas molecules from high to low concentration

• The movement of air molecules from high to low concentration

• The movement of solid particles from high to low concentration

What type of membrane is involved in osmosis?

• Semi-permeable membrane

• Impermeable membrane

• Non-permeable membrane

• Permeable membrane

In osmosis, water molecules move from a region of ______ concentration to a region of ______ concentration.

• none, none

• equal, equal

• high, low

• low, high

Which of the following is an example of osmosis in plants?

• Plants absorbing sunlight for photosynthesis

• Plants growing towards light

• Plants absorbing water from the soil through root hairs

• Plants releasing oxygen into the air

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

How many water molecules are present in the concentrated salt solution in the second osmosis example?

• 12

• 16

• 8

• 4

Which of the following is NOT an example of osmosis?

• Fish absorbing water through skin and gills

• Helium balloons rising

• Potato placed in water absorbing water

• Digested food absorbed in the intestines