Diffusion and Osmosis

Diffusion and Osmosis

Grade 9

Multiple Choice

Which of the statements below is the incorrect about matter

• matters are made of particles

• the particles are static

• the particles are constantly moving

Name the four states of matter

Solid , liquid, gas and plasma. Matter is made up of tiny particles called atoms. These particles are in constant motion.

Kinetic theory of Matter

• All matters are made up of particles

• Particles attracts each other

• Particles are in constantly moving

• The higher the temperature the faster they move

Multiple Choice

which statement best describe diffusion

• the spreading of particle until there is equilibrium

• the confinement of particle in a tiny space

• the movement of water molecule from one place to another

• none of the above

Diffusion

Diffusion is the movement of particles from an area of higher concentration to lower concentration.

Multiple Choice

The movement of water into or out of a cell through a selective permeable membrane is . .

• exocytosis

• solubility

• osmosis

• active transport

Multiple Choice

your pour some food coloring in a glass of water and later found the the color of the water change which cause the this

• osmosis

• diffusion

• active transport

• absorption

Osmosis

Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. 

Multiple Choice

the carbon dioxide in the blood move into the lungs

• because there is a higher concentration of carbon dioxide in the lungs than in the blood

• because there is a higher concentration of carbon dioxide in the blood than in the lungs.

• because there is a lower concentration of carbon dioxide in the blood than in the lungs.

• that is just how it works

Concentration

concentration pertains to the amount of a sub-component of a solution, e.g. the amount of solutes in a solution. Gradient, in turn, is a term that in general refers to the progressive increase or decrease of a variable with respect to distance. In this regard, a concentration gradient would be the outcome when the amounts of solutes between two solutions are different.

Multiple Choice

Two pieces potatoes were placed in a beaker. One in salt water the other in tap water. From your knowledge of osmosis which potato will remain fresh

• none of them

• both of them

• the one in salt water

• the one in tap water

Multiple Choice

is the quality of a membrane to allow some substances to pass through while leaving others.

• solvent

• Osmosis

• composite membrane

• selective permeable

Multiple Choice

Mark put a crystal in hot water and one in cold water. Which is a logical outcome

• the one in cold water will diffuse the faster

• the one in hot water will diffuse faster

• the both diffuse at the same time

Multiple Choice

All the following speed up the rate of diffusion except

• higher temperature

• thin surface area

• higher the concentration gradient

• large particles