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