Primary School Science

Human Body for Kids engages young, inquisitive learners, while the depth of material gets older students ready for tests. Join Kevin and his friends to explore the skeletal, nervous, muscular, circulatory, urinary, respiratory, and digestive systems along with the five senses. Clear explanations and humor make this video perfect for the classroom and home. Created along with teachers to meet state testing standards. 

After learning about how the human body works, join Marko and take a short practice test. Marko will give you tips to help learners perform well on a science test. 

Here's an exciting way to learn important facts and get ready for a life science test! Marko the Pencil and his friend Bailey take learners on a fascinating journey to Marko's Super Science Station where it's easy and fun to grasp science concepts and boost test scores. This science video for kids covers photosynthesis, plant parts, butterfly lifecycle, plant and animal cells, food chains, food webs, and more!

Physical Science for Kids is the fun way to learn important facts about physical science and get ready for tests. Take a fascinating journey to the Super Science Station to learn about lab safety, the scientific method, atoms, molecules, electricity, magnetism, motion, energy, states of matter, and more. For gifted preschool learners to kids in junior high, all ages will enjoy this learning adventure. Clear explanations and humor make this video perfect for the classroom and home. Created along with teachers to meet state test standards. 

100 easy science experiments at home with explanation in English - part 1 (1-50). They are very simple to do at home. Many people ask me about explanation for experiments, so today I did it. I am working on part 2, please support my channel when you love my videos.

Firstly, our nights would definitely be darker. Due to this, night predators like owls would find it very difficult to hunt at night. But, this would be great news for stargazers as there is no interference from moonlight. Secondly, as the moon's gravity is no longer there to hold the earth, it would rotate faster and thus, our days will be much shorter than 24 hours. Craters on moon are a proof that it has protected earth from thousands of asteroids and comets, this no longer will be the case.

With the moon missing, tides in our oceans will be much much smaller as only sun will slightly influence them. Changing tides will also influence the global weather patterns. Finally, moon's disappearance might tilt earth's axis drastically, causing extreme changes in seasons and climate.

Firstly, our nights would definitely be darker. Due to this, night predators like owls would find it very difficult to hunt at night. But, this would be great news for stargazers as there is no interference from moonlight. Secondly, as the moon's gravity is no longer there to hold the earth, it would rotate faster and thus, our days will be much shorter than 24 hours. Craters on moon are a proof that it has protected earth from thousands of asteroids and comets, this no longer will be the case.

With the moon missing, tides in our oceans will be much much smaller as only sun will slightly influence them. Changing tides will also influence the global weather patterns. Finally, moon's disappearance might tilt earth's axis drastically, causing extreme changes in seasons and climate.

The most obvious effect of 2 moons would be that our nights would be much much brighter. That would certainly be bad news for stargazers and astronomers.

Also, as you all know that tides on earth are a result of the moon. So, 2 moons would either amplify this effect or cancel out each other. If they were to amplify then we could have huge tides, effectively making living near shorelines almost impossible. But it will definitely be good news for all the surfers.

Finally, as the number of moons increases, so will the number of solar eclipses. Also, hypothetically, if they were to ever collide with each other, then the amount of debris coming out of such collision would make living on earth almost impossible.

Tides are the periodic rise and fall of sea level at a particular place. When the sea level rises to its greatest height, it is known as a high tide and when the sea level drops to its lowest height, it is known as a low tide. Tides are primarily caused due to the gravitational force of the moon.

Do you know how?

Part of the earth facing the moon experiences a stronger gravitational pull towards the moon as compared to the earth's center. So, the part facing the moon is pulled away from the center, creating a bulge and thus, increasing the sea level and causing a high tide.

Now, the earth's center experiences a stronger gravitational force towards the moon than the part facing away from the moon. Hence, this part is pulled away from the center, resulting in high tide on the opposite side as well.

In addition to this, the places in between the two high tides, where the sea level drops, experience low tides.

Our moon takes about 27 days to rotate around its own axis and 27.3 days to revolve around the earth. This means the moon rotates around its axis at almost the same rate or speed as it revolves around the earth. Hence, the same side of the moon is constantly facing the earth, making us see only one or same side of the moon.

However, if the moon did not rotate on its axis, then we could see the other side of the moon. We would also see the other side, if the moon rotated in 13.5 days, i.e., it made two rotations in one revolution. But this is not the case. However, an interesting fact is that due to the elliptical orbit of the moon, we can see almost 59% of the moon's surface.

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Moon does not have light of its own.

Why? Didn't he pay the electricity bill.

Please listen.

Sunlight or white light is a mixture of visible colors.

Now, when the sunlight falls on the moon, it reflects all these visible colors equally, making the moon to mostly appear white.

However, during a lunar eclipse when the earth is exactly between the sun and the moon, the moon appears red.

This happens because of the earth's atmosphere.

When the sunlight coming from the sun passes through the earth's atmosphere, the earth's atmosphere scatters the colors of the sunlight having shorter wavelengths. However, red color which has the longest wavelength is least scattered.

Hence, it makes its way to the moon, making it look red

Black holes are formed when stars which are about 10 times the mass of our Sun or higher use up all their fuel and explode. Eventually they collapse under the weight of their own gravity and form a black hole.

Now if our Sun became a black hole:

Firstly, it would be less than 6 kilometers across.

Secondly, no guesses here, everything will be pitch dark as there will be no more sunlight.

Thirdly, without sunlight, life as we know it will slowly but surely wither away.

Fourthly, planets in the solar system will not get sucked into the black hole though.

Why?

Firstly, Sun will not contain more matter than it has now.

Secondly, Sun's position with respect to the planets will not change.

Firstly, there would be no need of freezers or air conditioners any more. Everything on earth would completely freeze.

Secondly, assuming that earth is still orbiting at the same distance, earth will find itself out of the habitable zone of the Sun, thus slowly but surely wiping out all life on it.

Thirdly, stocks of solar energy companies would completely tank as extremely less sunlight will reach earth's surface.

Fourthly, as there would be extreme scarcity of sunlight, plants in order to perform photosynthesis would probably turn blackish or darkish green in order to absorb as much incident sunlight as possible.

Lastly, as sun's gravitational pull would greatly reduce, outer planets of the solar system, namely Uranus and Neptune may drift away into space.

The sun’s enormous mass and gravitational power locks the planets in their orbits. If the sun disappeared, the earth would fly off in a straight line into space. Earth would collapse into darkness only after 8 minutes, as sunlight takes about 8 minutes to reach earth. Moon would disappear as it doesn’t produce light of its own. Plants would die, as no sunlight means no photosynthesis.

Within a week, earth’s temperature would drop below 0 degrees Fahrenheit, dropping to negative 100 degrees Fahrenheit within a year, making it impossible for us to survive. Ocean surfaces would freeze, however, water in the interior would stay liquid, due to heat from the Earth’s core. Only microorganisms who don’t require photosynthesis, would survive by converting core’s heat into the energy they need. Thus, without the sun, humans wouldn’t exist.

As per Roman Mythology, jupiter is the god of thunder, lightning and storms. It is the largest planet in our solar system and its mass is about 2.5 times the total combined weight of all the other planets in our solar system.

Now, if jupiter would have never existed, it is safe to say that even we would not have existed. This is because some scientists believe that during the initial stages of the formation of our solar system, jupiter's inward migration towards the sun and then subsequent outward migration away from the sun and towards saturn played a vital role in the formation of mercury, venus and earth. Also, since ages jupiter has been protecting earth from collisions with large asteroids and comets. Lastly, more than 70 moons of jupiter would have wandered along the solar system as orphans.