Chapter 2

What is diffusion?

• When molecules move from a low concentration to a high concentration

• When molecules move from a high concentration to a low concentration.

• When there is no movement of molecules

• When molecules move everywhere regardless of concentration

Osmosis is specifically.....

• diffusion of water molecules through a semi-permeable mebrane from an area of low concentration to an area of high concentration

• the diffusion of particles from an area of high concentration to an area of low concentration

• diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration

• the diffusion of particles from an area of low concentration to an area of high concentration

Where is there a low concentration of perfume?

• in the bottle
• on the hand
• in the room
• in the top

Diffusion stops when

• The concentration of molecules is spread evenly

• The molecules are all in one location

• The molecules get really cold

• The molecules get really warm

Where is the high concentration of tea molecules?

• Water

• Tea Bag

• Air

Tags

NGSS.MS-PS1-2

Why does the tea move out of the tea bag and into the water?

• The warm water forces it out of the tea bag

• The water attracts the tea like a magnet

• There is a higher concentration (amount) of tea in the bag and less in the water

• Tea wants to go swimming

Tags

NGSS.MS-PS1-2

Passive Transport is the movement of particles across the membrane from an area of [ ___ ] to an area of [ ___ ]

• high to low

• low to high

• low to low

• high to high

Passive Transport uses ____ energy

• no

• a lot of

• a little bit of

• some

What organelle controls how materials go into and out of the cell?

• Cell wall

• Nucleus

• Cell Membrane

• Mitochondria

Tags

NGSS.MS-LS1-2

An example of diffusion is

• Gas exchange in the lungs

• Glucose transport

• A gummy worm dropped into water

• Exocytosis