HOTS | Experihub Learning

04 July

HOTS | Pollution & Plastics | Why should we not throw plastic bottles into the river?

Water pollution (or aquatic pollution) is the contamination of water bodies, usually as a result of human activities, so that it negatively affects its uses. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and groundwater. Water pollution results when contaminants are introduced into these water bodies. Water pollution can be attributed to one of four sources: sewage discharges, industrial activities, agricultural activities, and urban runoff…

04 July

HOTS | Respiration in Organisms | Why should we not sleep under a tree at night?

Naman Chemistry, Air

During daytime, plants take in carbon dioxide and release oxygen in the process of photosynthesis in the presence of sunlight. However, they even respire simultaneously and hence also take in oxygen and release carbon dioxide. But the production of oxygen is more than the production of carbon dioxide. Hence,…

04 July

HOTS | Sound | Explosion on Moon -Will it be seen or heard on the earth instantly or after some time

Naman Physics, Sound

Will it be seen or heard on the earth instantly or after some time ? For more such videos : https://www.youtube.com/c/ExperiHub?sub_confirmation=1 For more Science related blogs and videos : https://experihub.com/did-you-know/

04 July

Summer solstice in India

Naman Climate and Weather, Environmental Studies

The summer solstice, also called the estival solstice or midsummer, occurs when one of Earth’s poles has its maximum tilt toward the Sun. It happens twice yearly, once in each hemisphere (Northern and Southern). For that hemisphere, the summer solstice is the day with the longest period of daylight and shortest night of the year, when the Sun is at its highest highest position in…

28 June

HOTS | Respiration In Organisms | Heart Beats Faster During Exercise Or while Running

Naman Biology, Human Body

Respiration In Organisms – Heart Beats Faster During Exercise Or while Running Q. WHEN YOU RUN, YOUR BREATHING BECOMES FASTER AS YOU NEED MORE OXYGEN. BUT WHY DOES YOUR RATE OF HEARTBEAT ALSO INCREASE? When you run, your oxygen intake increases because you require a constant supply of it in…

28 June

HOTS | What do burning Wool and Cotton smell like?

Naman Chemistry, Organic Chemistry

Burning Cotton smells like Burning Paper, whereas burning wool smells like burning hair. Why? Ans. Cotton and paper, both are plant products and they both contain an organic compound named ‘Cellulose’. So while burning cotton and paper, when this cellulose is burnt it gives out a similar characteristic smell. Hence…

27 June

Are Weak and Dilute Acids the Same? | HOTS

Naman Acid and Base, Chemistry

Weak and Dilute Acids – What’s the difference? People often think that weak and dilute acids are just the same. This confusion is due to their literal meaning. However, are they actually the same? Watch out our video to understand the difference and the factors that separate these two from…

27 June

Why is Time always on X-Axis in a Graph | Time & Motion | HOTS | Class 8

Naman Mathematics, Graphs

In physics, different quantities are often represented on graphs and very commonly time is represented on the horizontal x-axis. But why is Time always on X-axis in a graph? In physics, different quantities are often represented on graphs and very commonly time is represented on the horizontal x-axis. But does…

27 June

Why does your tongue burns when you eat something Hot | HOTS | The Tongue

Naman Biology, Human Body

Have you ever been so excited to drink the first bite of pizza, but your tongue burns because it’s so hot? What exactly is happening inside your mouth? Watch out this interesting video to get the answer! For more such videos : https://www.youtube.com/c/ExperiHub?sub_confirmation=1 For more Science related blogs and videos…

27 June

2 Thin Woolen Sweaters are warmer than 1 thick one |Heat| Fibre to Fabric

Naman Physics, Heat

Come winters and all of us like to wrap ourselves with colorful Woolen Sweaters…and as the temperature dips further, we realise that another layer of the sweaters is needed to beat the chill. Same is the case with blankets. As the winters reach their peak, even the warmest of blankets…

27 June

Earth vs Venus | HOTS | Class 8 | The Universe

Naman Physics, Solar System

Earth vs Venus – while they are two planets in our solar system, the former is the third planet while the latter is the fourth planet in the solar system. In addition, the mass of the former is much more than the latter. The latter is very close to the…

27 June

Why do hanging hoardings and banners have holes? | Winds, Storms & Cyclones | HOTS

Naman Physics, Pressure

You may have seen holes made in huge hoardings and banners. Why are these necessary? Let’s find it out! The holes, simply let the air pass through, without any resistance. When air hits the hoarding, the hoarding board acts as a barrier in its path, so the air will try…

27 June

Why do Electric Wires Sag in Summers?| Heat | Thermal Expansion | Class 7

Naman Physics, Heat

In the summer, because of thermal expansions, the electric wires sag, and in the winter, due to contraction, they may break. As a result, when setting up the wires between the poles, it’s important to keep them somewhat loose in the summer so that they don’t break in the winter due…

27 June

Why are electric wires made of Copper & not Silver | Electricity | HOTS

Naman Physics, Heat

Silver is a precious metal and it is the only metal with a higher electrical conductivity than copper. But, it is an expensive material when compared to copper. This is why electric wires usually made of copper, but not silver. For more such videos : https://www.youtube.com/c/ExperiHub?sub_confirmation=1 For more Science related…

25 April

Heat – Understanding Conduction

Naman Physics, Heat

Thermal conduction is the transfer of internal energy by microscopic collisions of particles and movement of electrons within a body. The colliding particles, which include molecules, atoms, and electrons, transfer disorganized microscopic kinetic and potential energy when joined, known as internal energy. Conduction takes place in most phases: solid, liquid,…

25 April

Convection Experiment | Heat

Naman Physics, Heat

Heat transfer is the transfer of heat or thermal energy between physical systems. So when there is a temperature difference between two bodies, heat is transferred from the hot body to the colder body. There are three common modes of heat transfer – conduction, convection, and radiation. In this article,…

25 April

How Does Exterior Wall Colors Affect The Temperature Inside A Building? | Radiation Experiment

Naman Physics, Heat

Radiation heat transfer experiment – The aim of the experiment is to investigate whether the amount of infrared radiation absorbed by a surface increases the temperature and depends on the physical characteristics of that surface . Thermal energy transfer from the sun to the earth in the form of ultraviolet…

25 April

What is Osmosis? |Potato Experiment

Naman Biology, Osmosis

Osmosis is a vital process in biological systems, as biological membranes are semipermeable. In general, these membranes are impermeable to large and polar molecules, such as ions, proteins, and polysaccharides, while being permeable to non-polar or hydrophobic molecules like lipids as well as to small molecules like oxygen, carbon dioxide,…

25 April

Egg in Vinegar Experiment | What Happens If You Put A Raw Egg in Vinegar?

Naman Chemistry, Chemical reactions

A well-known chemistry experiment is done by placing an egg (raw or boiled) into a container filled with Vinegar. After a few days, something exciting is observed: the egg becomes rubbery and bouncy. The eggshell is formed by calcium carbonate (CaCO3), a salt in limestone, plaster, marble, chalk, corals, shells…

25 April

Why Are Heaters Placed Near The Floor & Air Conditioners Near The Ceiling?

Naman Physics, Heat

The heater is placed near the floor because the air currents move upwards so the hot air fills up the whole room. Whereas, an air conditioner is placed near the ceiling because the cold breeze tends to settle down. If it is placed near the floor then it will fill just…

25 April

How Does A Thermos Flask Work?

Naman Physics, Heat

The vacuum flask consists of two vessels, one placed within the other and joined at the neck. The gap between the two vessels is partially evacuated of air, creating a partial-vacuum which reduces heat conduction or convection. Heat transfer by thermal radiation may be minimized by silvering flask surfaces facing…

25 April

Why Is The Back Of A Refrigerator Painted Black?

Naman Physics, Heat

It could simply be that black paint is cheaper… But I believe that the external coils on the back of refrigerator are painted black for the following reason: There is a rule in nature that says “a color that is better at absorbing heat is also better at radiating heat.” …

25 April

How Can We Use A Lever To Move An Object Without Picking It Up?

Naman Physics, Simple Machines

We encounter various types of lever in our everyday lives: opening a drink with a bottle opener, cutting paper with scissors, taking the lid off a paint pot using a screwdriver, and – the simplest of all – playing on a seesaw in the park. Yet, the principle of levers…

25 April

What Are The Different Kinds of Levers?

Naman Physics, Simple Machines

Levers are a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is divided into three…

25 April

Heat

Naman Physics, Heat

According to heat definition, it is one of the essential forms of energy for the survival of life on earth. Transfer of heat takes place from one body to another due to difference in temperature as per thermodynamics. We use heat energy for various activities like cooking, ironing, transportation, recreation,…

25 April

Light

Naman Physics, Light

No single answer to the question “What is light?” satisfies the many contexts in which light is experienced, explored, and exploited. The physicist is interested in the physical properties of light, the artist in an aesthetic appreciation of the visual world.

25 April

Electric current

Naman Physics, Electricity

Current Current is the flow of particles in a particular direction. E.g air currents that cause winds or water currents. When particles flow in an electric circuit to produce electricity, it is called an electric current. Electric current The flow of electric charges in a circuit is called an…

25 April

Statistics | The science of collecting, describing, and interpreting data

Naman Statistics, Mathematics

Statistics is simply defined as the study and manipulation of data. As we have already discussed in the introduction that statistics deals with the analysis and computation of numerical data. Let us see more definitions of statistics given by different authors here. According to Merriam-Webster dictionary, statistics is defined as “classified…

25 April

Astronomy and Space

Naman STEM in Real Life, Astronomy 101

Astronomy is one of the oldest natural sciences. The early civilizations in recorded history made methodical observations of the night sky. These include the Babylonians, Greeks, Indians, Egyptians, Chinese, Maya, and many ancient indigenous peoples of the Americas. In the past, astronomy included disciplines as diverse as astrometry, celestial…

22 April

Transpiration in Plants

Naman Biology, Plants

Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. Mass flow of liquid water…