Class 4 Exam > Class 4 Videos > Science Olympiad Class 4 > Quick Revision: How do plants make their food?
Quick Revision: How do plants make their food? Video Lecture | Science Olympiad Class 4
FAQs on Quick Revision: How do plants make their food? Video Lecture - Science Olympiad Class 4
| 1. How do plants make their food? |  |
Ans. Plants make their food through a process called photosynthesis. They use sunlight, water, and carbon dioxide to produce glucose and oxygen.
| 2. What is the role of chlorophyll in the process of making plant food? | |
Ans. Chlorophyll is a green pigment in plant cells that absorbs sunlight. It is essential for photosynthesis as it helps plants convert light energy into chemical energy to make food.
| 3. Can plants make food without sunlight? | |
Ans. No, plants require sunlight for photosynthesis to occur. Without sunlight, they are unable to produce food and may not survive.
| 4. Why is water important for plants to make food? | |
Ans. Water is a crucial component in photosynthesis as it provides the hydrogen atoms needed to combine with carbon dioxide to produce glucose. It also helps transport nutrients within the plant.
| 5. What happens to the oxygen produced during photosynthesis? | |
Ans. The oxygen produced during photosynthesis is released into the atmosphere as a byproduct. It is essential for the survival of living organisms that depend on oxygen for respiration.
Text Transcript from Video
0:0:0: hey there young
0:0:1: explorers today we're going on an
0:0:4: adventure into the world of food but not
0:0:7: just any food we are talking about the
0:0:9: food that keeps us moving growing and
0:0:12: being our awesome s food is something
0:0:15: that provides
0:0:17: nutrients nutrients are substances that
0:0:20: provide energy for activity growth and
0:0:23: all functions of the body so let's dive
0:0:26: in and discover more about this amazing
0:0:28: journey now let's turn our gaze towards
0:0:32: those quiet green friends of ours
0:0:35: plants have you ever wondered how plants
0:0:38: made their food well they have a secret
0:0:41: kitchen called
0:0:43: photosynthesis this is where all the
0:0:45: magic happens are you ready for the
0:0:48: secret
0:0:49: recipe here it goes plants take water
0:0:52: and minerals from the soil and carbon
0:0:54: dioxide from the air then With a Little
0:0:58: Help from sunlight and a special
0:1:0: ingredient called chlorophyll they whip
0:1:2: up their food and guess what this
0:1:6: process doesn't just make food for the
0:1:8: plant it also creates oxygen which is a
0:1:11: big win for us so next time you're out
0:1:14: in the sun remember to thank the plants
0:1:17: for their hard work let us see what this
0:1:20: process is called The process by which
0:1:23: leaves prepare food using water and
0:1:25: minerals from the soil and carbon
0:1:27: dioxide from the air in the presence of
0:1:29: sun sunlight and chlorophyll is called
0:1:32: photosynthesis moving on let's zoom in
0:1:35: on a
0:1:36: leaf yes a leaf is not just a leaf it's
0:1:40: a food factory and every part of it
0:1:43: plays a role in making food for the
0:1:46: plant imagine a leaf as a busy kitchen
0:1:49: with different
0:1:51: sections let's take a closer look here
0:1:55: we are inside the Leaf's kitchen each
0:1:58: part has a name and a JW there's the
0:2:2: leaf base axle stem mid rib margin and
0:2:6: more these parts work together to make
0:2:9: sure the plant stays healthy and grows
0:2:12: they're like a team in a kitchen where
0:2:14: everyone knows their job from the head
0:2:16: chef to the
0:2:18: dishwasher its team workor at its best
0:2:21: now plants are quite smart they know
0:2:24: it's important to save some food for
0:2:26: later just like we might save some
0:2:29: cookies in a jar they store extra food
0:2:32: as starch in different parts like fruits
0:2:35: stems Roots leaves flowers and seeds and
0:2:40: guess what we often eat these parts
0:2:43: because they are packed with good stuff
0:2:44: thanks to the plants hard work our story
0:2:48: wouldn't be complete without talking
0:2:50: about the friendship between plants and
0:2:52: animals yes they depend on each other in
0:2:56: many ways animals including us depend
0:2:59: depend on plants for food and oxygen and
0:3:3: plants they rely on animals too let's
0:3:7: find out how animals have a special
0:3:10: relationship with plants animals depend
0:3:14: on plants for food herbivorous animals
0:3:17: such as goats cows and deer directly
0:3:20: depend on plants for food carnivorous
0:3:23: animals get their food by eating other
0:3:26: animals therefore they also indirectly
0:3:29: depend depend on plants for food animals
0:3:32: depend on plants for oxygen given out
0:3:35: during
0:3:36: photosynthesis and it's not a one-way
0:3:39: Street plants need animals too plants
0:3:43: depend on animals for carbon dioxide
0:3:45: that they give out during breathing
0:3:48: plants depend on animals for nutrients
0:3:50: in the soil animal wastes as well as
0:3:53: their dead bodies provide nutrients to
0:3:55: the soil plants depend on animals to
0:3:59: disperse seed s to distant places so
0:4:1: that new plants can grow at far off
0:4:3: places without overcrowding at one place
0:4:7: now let's spice things up with some
0:4:9: unusual plants ever heard of mushrooms
0:4:13: cacti or
0:4:14: crotin they're not your typical green
0:4:16: leafy plants but they sure are
0:4:19: interesting each has its unique way of
0:4:22: living and adds a bit of mystery to a
0:4:24: plant exploration mushrooms and malls do
0:4:27: not contain chlorophyll and are non
0:4:29: green
0:4:30: these plants lack the ability to make
0:4:32: their food and therefore obtain it from
0:4:35: dead and decaying plants and animals the
0:4:38: leaves of cactus plant are reduced to
0:4:40: spines and cannot perform
0:4:43: photosynthesis the food is prepared by
0:4:45: the green stem the leaves of croin may
0:4:48: appear red yellow purple in addition to
0:4:51: Green however it does contain
0:4:54: chlorophyll the chlorophyll in its
0:4:56: leaves is masked by the other color
0:4:59: pigments like red yellow purple
0:5:2: Etc thus photosynthesis occurs in croin
0:5:7: also speaking of unusual some plants
0:5:10: have quite the
0:5:11: appetite parasitic plants depend on
0:5:14: others for food while insectivorous
0:5:16: plants like the pitcher plant and Venus
0:5:19: fly trap catch insects for extra
0:5:22: nutrients it's a wild world out there in
0:5:25: the plant kingdom let's see how they
0:5:28: differ parasitic
0:5:30: plants plants that obtain nutrition from
0:5:33: other plants are called parasitic plants
0:5:36: the plants that provide nutrition are
0:5:38: called host plants most of the parasitic
0:5:41: plants do not undergo photosynthesis and
0:5:44: are dependent totally on their host for
0:5:47: nutrition these are total
0:5:49: parasites Rafia is an example
0:5:53: insectivorous plants insectivorous
0:5:56: plants are green plants that are able to
0:5:58: make their own food food but they grow
0:6:0: in Sal that lacks nutrients
0:6:3: minerals these plants trap insects kill
0:6:6: them digest and absorb nutrition
0:6:8: minerals from their body some
0:6:11: interesting examples of insectivorous
0:6:14: plants are piter plant sunu Venus flly
0:6:17: trap and bladder
0:6:19: V and that's it friends our journey
0:6:23: through the world of plants and their
0:6:25: food
0:6:26: Secrets we've learned a lot today from
0:6:29: photos synthesis to the teamw work in a
0:6:31: leaf and the special bond between plants
0:6:33: and
0:6:34: animals we hope that you have understood
0:6:37: the topic you can now study chapter
0:6:40: notes watch video lectures and solve McQ
0:6:43: tests of this chapter on uff to ensure
0:6:46: you score well in your school
0:6:48: exams and that's not all you also get
0:6:51: amazing courses for maths science
0:6:53: English Hindi and much more for class 4
0:6:57: thank you
0:0:1: explorers today we're going on an
0:0:4: adventure into the world of food but not
0:0:7: just any food we are talking about the
0:0:9: food that keeps us moving growing and
0:0:12: being our awesome s food is something
0:0:15: that provides
0:0:17: nutrients nutrients are substances that
0:0:20: provide energy for activity growth and
0:0:23: all functions of the body so let's dive
0:0:26: in and discover more about this amazing
0:0:28: journey now let's turn our gaze towards
0:0:32: those quiet green friends of ours
0:0:35: plants have you ever wondered how plants
0:0:38: made their food well they have a secret
0:0:41: kitchen called
0:0:43: photosynthesis this is where all the
0:0:45: magic happens are you ready for the
0:0:48: secret
0:0:49: recipe here it goes plants take water
0:0:52: and minerals from the soil and carbon
0:0:54: dioxide from the air then With a Little
0:0:58: Help from sunlight and a special
0:1:0: ingredient called chlorophyll they whip
0:1:2: up their food and guess what this
0:1:6: process doesn't just make food for the
0:1:8: plant it also creates oxygen which is a
0:1:11: big win for us so next time you're out
0:1:14: in the sun remember to thank the plants
0:1:17: for their hard work let us see what this
0:1:20: process is called The process by which
0:1:23: leaves prepare food using water and
0:1:25: minerals from the soil and carbon
0:1:27: dioxide from the air in the presence of
0:1:29: sun sunlight and chlorophyll is called
0:1:32: photosynthesis moving on let's zoom in
0:1:35: on a
0:1:36: leaf yes a leaf is not just a leaf it's
0:1:40: a food factory and every part of it
0:1:43: plays a role in making food for the
0:1:46: plant imagine a leaf as a busy kitchen
0:1:49: with different
0:1:51: sections let's take a closer look here
0:1:55: we are inside the Leaf's kitchen each
0:1:58: part has a name and a JW there's the
0:2:2: leaf base axle stem mid rib margin and
0:2:6: more these parts work together to make
0:2:9: sure the plant stays healthy and grows
0:2:12: they're like a team in a kitchen where
0:2:14: everyone knows their job from the head
0:2:16: chef to the
0:2:18: dishwasher its team workor at its best
0:2:21: now plants are quite smart they know
0:2:24: it's important to save some food for
0:2:26: later just like we might save some
0:2:29: cookies in a jar they store extra food
0:2:32: as starch in different parts like fruits
0:2:35: stems Roots leaves flowers and seeds and
0:2:40: guess what we often eat these parts
0:2:43: because they are packed with good stuff
0:2:44: thanks to the plants hard work our story
0:2:48: wouldn't be complete without talking
0:2:50: about the friendship between plants and
0:2:52: animals yes they depend on each other in
0:2:56: many ways animals including us depend
0:2:59: depend on plants for food and oxygen and
0:3:3: plants they rely on animals too let's
0:3:7: find out how animals have a special
0:3:10: relationship with plants animals depend
0:3:14: on plants for food herbivorous animals
0:3:17: such as goats cows and deer directly
0:3:20: depend on plants for food carnivorous
0:3:23: animals get their food by eating other
0:3:26: animals therefore they also indirectly
0:3:29: depend depend on plants for food animals
0:3:32: depend on plants for oxygen given out
0:3:35: during
0:3:36: photosynthesis and it's not a one-way
0:3:39: Street plants need animals too plants
0:3:43: depend on animals for carbon dioxide
0:3:45: that they give out during breathing
0:3:48: plants depend on animals for nutrients
0:3:50: in the soil animal wastes as well as
0:3:53: their dead bodies provide nutrients to
0:3:55: the soil plants depend on animals to
0:3:59: disperse seed s to distant places so
0:4:1: that new plants can grow at far off
0:4:3: places without overcrowding at one place
0:4:7: now let's spice things up with some
0:4:9: unusual plants ever heard of mushrooms
0:4:13: cacti or
0:4:14: crotin they're not your typical green
0:4:16: leafy plants but they sure are
0:4:19: interesting each has its unique way of
0:4:22: living and adds a bit of mystery to a
0:4:24: plant exploration mushrooms and malls do
0:4:27: not contain chlorophyll and are non
0:4:29: green
0:4:30: these plants lack the ability to make
0:4:32: their food and therefore obtain it from
0:4:35: dead and decaying plants and animals the
0:4:38: leaves of cactus plant are reduced to
0:4:40: spines and cannot perform
0:4:43: photosynthesis the food is prepared by
0:4:45: the green stem the leaves of croin may
0:4:48: appear red yellow purple in addition to
0:4:51: Green however it does contain
0:4:54: chlorophyll the chlorophyll in its
0:4:56: leaves is masked by the other color
0:4:59: pigments like red yellow purple
0:5:2: Etc thus photosynthesis occurs in croin
0:5:7: also speaking of unusual some plants
0:5:10: have quite the
0:5:11: appetite parasitic plants depend on
0:5:14: others for food while insectivorous
0:5:16: plants like the pitcher plant and Venus
0:5:19: fly trap catch insects for extra
0:5:22: nutrients it's a wild world out there in
0:5:25: the plant kingdom let's see how they
0:5:28: differ parasitic
0:5:30: plants plants that obtain nutrition from
0:5:33: other plants are called parasitic plants
0:5:36: the plants that provide nutrition are
0:5:38: called host plants most of the parasitic
0:5:41: plants do not undergo photosynthesis and
0:5:44: are dependent totally on their host for
0:5:47: nutrition these are total
0:5:49: parasites Rafia is an example
0:5:53: insectivorous plants insectivorous
0:5:56: plants are green plants that are able to
0:5:58: make their own food food but they grow
0:6:0: in Sal that lacks nutrients
0:6:3: minerals these plants trap insects kill
0:6:6: them digest and absorb nutrition
0:6:8: minerals from their body some
0:6:11: interesting examples of insectivorous
0:6:14: plants are piter plant sunu Venus flly
0:6:17: trap and bladder
0:6:19: V and that's it friends our journey
0:6:23: through the world of plants and their
0:6:25: food
0:6:26: Secrets we've learned a lot today from
0:6:29: photos synthesis to the teamw work in a
0:6:31: leaf and the special bond between plants
0:6:33: and
0:6:34: animals we hope that you have understood
0:6:37: the topic you can now study chapter
0:6:40: notes watch video lectures and solve McQ
0:6:43: tests of this chapter on uff to ensure
0:6:46: you score well in your school
0:6:48: exams and that's not all you also get
0:6:51: amazing courses for maths science
0:6:53: English Hindi and much more for class 4
0:6:57: thank you
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Oct 17, 2025
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