Diffusion
Muhtasari
Open a bottle of perfume in one corner of a room and soon you can smell it everywhere. The scent particles have spread out by diffusion, moving from where they were crowded to where they were sparse, with no pump or effort. Your cells use this same free process every second to take in oxygen and get rid of carbon dioxide.
In this lesson you will learn exactly what diffusion is, where its energy comes from, why it is vital to living organisms, and how surface area, temperature, concentration gradient and distance change its rate.
Malengo
- Describe diffusion as the net movement of particles from a region of their higher concentration to a region of their lower concentration (i.e. down a concentration gradient), as a result of their random movement
- State that the energy for diffusion comes from the kinetic energy of random movement of molecules and ions
- State that some substances move into and out of cells by diffusion through the cell membrane
- Describe the importance of diffusion of gases and solutes in living organisms
- Investigate the factors that influence diffusion, limited to: surface area, temperature, concentration gradient and distance
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Diffusion. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Diffusion is the net movement of particles: A. from low to high concentration B. from high to low concentration C. only of water D. using energy from respiration Answer: B
- The energy for diffusion comes from: A. respiration in the cell B. active transport C. the kinetic energy of the particles D. sunlight Answer: C
- Which change would speed up diffusion? A. lower temperature B. smaller surface area C. steeper concentration gradient D. greater distance Answer: C
- A larger surface area increases the rate of diffusion because: A. particles move slower B. more particles can cross at once C. the gradient disappears D. energy is added Answer: B
- Which substance does NOT normally cross the cell membrane by diffusion? A. oxygen B. carbon dioxide C. large protein molecules D. water Answer: C
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Diffusion? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
