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It's AumSum Time.
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Can you guess the title of my next video?
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Hurry up.
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Write your guess in the comments section below.
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Why do snakes shed their skin?
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Wait.
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I'll explain.
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When a snake grows, its outer skin layer called epidermis does not grow or get bigger with it.
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Hence, the snake sheds its epidermis periodically to allow further growth of its body.
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In addition to this, shedding also helps remove parasites present on the epidermis.
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So, does the snake buy a new skin?
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No.
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First listen.
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Before shedding, the snake grows a new epidermis beneath the old one.
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Secretes a fluid between the old and new epidermis.
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This fluid helps separate the old epidermis from the new one.
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Once this is done, the process of shedding begins.
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To remove the old epidermis, the snake rubs its head against any hard surface.
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Creating a tear either near mouth or near nose area.
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Then, it drags and wriggles it body against any hard surface and slowly slithers out of the old epidermis.
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How do bees make honey?
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No idea.
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To make honey, the worker honeybee sucks nectar from flowers and stores it in its honey stomach.
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Once the worker bee returns to the hive, it vomits the nectar into a processor honeybee's mouth.
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Ewww.
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In the processor bee's mouth and stomach, an enzyme called invertase is added to the nectar.
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Invertase breaks some nectar into simple sugars like glucose and fructose.
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Then it vomits the partially converted nectar into another processor bee's mouth.
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Who also adds more invertase helping breakdown more nectar.
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This process goes on until most of the nectar is converted into simple sugars.
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Then the mixture of simple sugars is stored in the honeycomb.
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At this point, the mixture is still watery.
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Hence, the bees flap their wings which evaporates water and thickens the mixture to eventually form honey.
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Why is salt added to icy roads?
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To make ice tasty.
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No.
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Salt helps melt the ice and thus, clear the roads.
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What?
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But how dude?
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The freezing or melting point of water is about 0 degrees Celsius or 32 degrees Fahrenheit.
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When temperature drops below the melting point, water molecules bond together to form solid ice.
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However, when temperature rises above the melting point.
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The bonds break and the ice melts forming liquid water.
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Now, when we add salt or sodium chloride to ice, it lowers the melting point causing solid ice to melt.
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Form liquid even at temperatures below 0 degrees Celsius.
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Then, the salt dissociates in the liquid water forming sodium and chloride ions.
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These ions make it harder for liquid water molecules to again bond together and form ice.
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Hence, the melting ice does not refreeze and thus, helps clear the roads.
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Why do we have seasons?
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Because of season fairies.
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No.
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It is mainly because of our earth's axis.
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Our earth's axis is tilted at an angle of about 23.5 degrees.
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Hence, as the earth revolves around the sun, sometimes the northern hemisphere points towards the sun.
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While sometimes the southern hemisphere.
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This causes seasons.
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Oh man.
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It is too complicated.
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Alright!!
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Let us observe the northern hemisphere to learn more about seasons.
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When the northern hemisphere points towards the sun.
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The sunrays directly strike the northern hemisphere.
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Thus, the temperatures are high, resulting in summer season in that region.
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However, when the northern hemisphere points away from the sun, the sun rays fall slanting on it.
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Thus, the temperatures are low, resulting in winter season.
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But when the northern hemisphere is neither tilted towards nor away from the sun.
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The temperatures are moderate, resulting in spring and autumn seasons.
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Topic: Transpiration
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Why do cacti have spines?
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Maybe they want to look like porcupines.
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Very funny.
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Spines help cacti to reduce transpiration.
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Well.
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I know all about vibration, but what's this new thing called transpiration?
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Transpiration is the loss of water from aerial parts, like stems and leaves, in the form of water vapor.
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These aerial parts contain stomata which allow water vapor to escape into the atmosphere.
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So, shall we tape the ariel parts so that the vapor won't escape?
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Pay attention.
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In deserts, where cactus usually grows, there is scarcity of water.
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Also, due to high temperatures, the rate of transpiration is very high.
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Thus, the leaves of a cactus have modified into spines.
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Spines don't have stomata.
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Thus, the rate of transpiration is reduced, helping the cactus to save water.
