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Diffusion and Osmosis Name

DIFFUSION Food, water, and other substances are made of different kinds of particles, such as molecules and ions. Particles are always moving, like dancers on a crowded dance floor.

You can tell how particles will tend to move if you know how crowded they are. Concentration refers to how crowded particles are. A juice concentrate is a very strong form of juice. It has many more juice particles than regular juice does.

When you mix the concentrate with water, the juice particles spread out in the water. In a concentrate, the juice particles are very crowded. They tend to move away from places where they are concentrated Thus, the particles become less concentrated.

Particles will continue to move from areas of high concentration to areas of low concentration until they reach equilibrium. This process is called diffusion.

Watch the demonstration with food coloring in water, then answer the following: Explain why the ink spreads out in the water. Use the words concentration and diffusion in your answer.

The dye is very concentrated when it enters the water The dye is very concentrated when it enters the water. The dye diffuses through the water to lower concentrated areas until equilibrium is reached.

Diffusion Through a Cell Membrane Cells also need food and water to live Substances move into and out of the cell through its cell membrane A cell membrane is like the cell’s skin.

Reviewing Vocabulary 1. 2. 3. 4. 5. 6.

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by d_____________iffusion. 2. The word c_____________refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell m______________embrane. 4. Particles tend to move toward places where they have a l_____c____________________. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a h concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

Reviewing Vocabulary 1. Some substances move into and out of cells by diffusion. 2. The word concentration refers to how crowded particles are. 3. Some particles diffuse into and out of cells through the cell membrane. 4. Particles tend to move toward places where they have a low concentration. 5. Particles tend to move away from places where they have a high concentration. 6. Give one example of diffusion in your home: tea in water, sugar in tea, ‘cut the cheese’

HALF-FILL a beaker with tap water. TAKE it to your desk. ADD a raison. WATCH while we continue our notes!

HALF-FILL a beaker with tap water. TAKE it to your desk. ADD a raison. WATCH while we continue our notes!

HALF-FILL a beaker with tap water. TAKE it to your desk. ADD a raisin. WATCH while we continue our notes!

HALF-FILL a beaker with tap water. TAKE it to your desk. ADD a raisin. WATCH while we continue our notes!

OSMOSIS Most of your body is made of water. This water can move into and out of your cells Water can enter and leave your cells by diffusion. When water DIFFUSES through a CELL MEMBRANE, the process is called OSMOSIS.

What happens to the raisin after sitting in the water for a while? It becomes larger Why does this happen?

Water molecules have a lower concentration inside the raisin. Outside the raisin, water molecules are crowded. Water molecules diffuse into the raisin by osmosis.

Cell Cell membrane Blood Cytoplasm DRAW THIS

Cell Cell membrane Blood Cytoplasm Water molecules are diffusing through the cell membrane. Why is the water moving INTO the cell in the picture?

Water moves into the cell by OSMOSIS because water has a lower concentration inside the cell than outside the cell.

Cell Cell membrane Blood Cytoplasm There are 11 water molecules in the blood and 3 molecules in the cytoplasm. How many water molecules must diffuse through the cell by osmosis. 11 + 3 = 14; The balance is 7 outside and 7 inside. Draw arrows on 4!

Cell Cell membrane Blood Cytoplasm There are 11 water molecules in the blood and 3 molecules in the cytoplasm. How many water molecules must diffuse through the cell by osmosis? 11 + 3 = 14; The balance is 7 outside and 7 inside. Draw arrows on 4!

Cell Cell membrane Blood Cytoplasm There are 11 water molecules in the blood and 3 molecules in the cytoplasm. How many water molecules must diffuse through the cell by osmosis? 11 + 3 = 14; The balance is 7 outside and 7 inside. Draw arrows on 4!

Cell Cell membrane Blood Cytoplasm There are 11 water molecules in the blood and 3 molecules in the cytoplasm. How many water molecules must diffuse through the cell by osmosis? 11 + 3 = 14; The balance is 7 outside and 7 inside. Draw arrows on 4!

Cell Cell membrane Blood Cytoplasm There are 11 water molecules in the blood and 3 molecules in the cytoplasm. How many water molecules must diffuse through the cell by osmosis? 11 + 3 = 14; The balance is 7 outside and 7 inside. Draw arrows on 4!