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Interesting Questions, Facts and Information
- There are a total of 150 general entries. We are selecting 30 for display.
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 Interesting Questions, Facts, and Information
 Science for Kids
astronomer. A chemist is a scientist who studies molecules and the way they behave. A biologist is a scientist who studies living things. A geologist is a scientist who studies the earth.
it eats plants. Herbivores are animals that only eat plants. A cow is an example of a herbivore.
gravity. Gravity is what holds us to the earth so we don't all float off into space! The moon has a lower gravity than earth. If you were to stand on the moon, you'd be able to jump into the air much more easily since there would be less force holding you to the ground.
frog. A tadpole is one of the stages in the life cycle of a frog. Frogs belong to a class of animals called amphibians. This means that they can live in the water or on land.
it eats meat. Carnivores are animals that eat meat. A tiger is an example of a carnivore.
7. There are seven colours in a rainbow: red, orange, yellow, green, blue, indigo and violet. It's easy to remember the right order by taking the first letter of each colour and using them to spell ROY G. BIV.
water. Clouds are made of water. When a cloud gets too full of water, it rains. If it's really cold, the rainwater freezes and this is when we get snow.
butterfly. A caterpillar is one of the stages in the life cycle of a butterfly. The caterpillar eats lots of food then makes a case for itself called a chrysalis and comes out as a beautiful butterfly.
H2O. H2O is the formula for water. This means that it contains 2 hydrogen (H) atoms joined to one oxygen (O) atom. When atoms are joined together they make a molecule.
Electricity. Lightning is made of electricity. It is thought that 100 lightning hits happen all over earth every single second!
A solution. When you dissolve something in something else, it is called making a solution. A cup of tea is a solution too, but I need some tea-leaves to make that as well as sugar!
Circle. When the moon is full, it looks like a circle in the sky. The moon shines and looks bright at night because light from the sun is bouncing off its surface.
It changes from a solid to a liquid. When you melt something, it changes from a solid into a liquid. You can look at this by watching an ice cube melt. If you put an ice cube on the sink, it will slowly change from a solid little block of ice into a puddle of water as it melts.
Oxygen. The oxygen in air is absorbed in our lungs and keeps us alive. The air we breathe contains lots of different gases such as nitrogen. Less than a quarter of the air around us is oxygen, but that's all we need!
Heart. The heart pumps blood around our bodies for us. If you put your hand to your chest, you can feel your heart going "thud-thud" - the "thud-thud" sound is your heart pumping blood.
| What is the name of the invisible line that runs right around the Earth's middle, dividing it into two halves? | More Fun Science for Kids
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The Equator. The Equator divides the Earth exactly in half! The top half is called the Northern Hemisphere and the bottom half is called the Southern Hemisphere.
Watts. The unit of power known as the watt is named after the Scottish engineer and inventor James Watt.
*The watt, an International System unit of power, is equal to one joule per second.
Amps. Fuses blow when too much current is drawn through them. This breaks the electrical circuit.
It is important to replace a blown fuse with one of the correct rating, as advised by the manufacturer of the appliance.
Using the wrong fuse rating could damage the appliance, or worse cause a fire!
| We can produce electricity from many sources, the burning of fossil fuels (coal or oil) for example.
What source supplies the energy to produce solar power? | Electricity - A Quiz for Bright Sparks
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Sun. Solar energy from the sun can be collected by photoelectric cells; these convert the sun's light into direct current (DC) electricity.
Archimedes. Yes, Archimedes pops his head up once again! The same guy who worked with levers also discovered that, if you fill a bathtub to the top and get in it, the weight of the water spilled on to the floor is equal to the weight of the body getting in to the bath. Don't try it at home, your parents will NOT be pleased, unless you have magical powers like Harry Potter?
| When you go ice-skating, you find that your most-embarrassing-aunt-of-all-time keeps falling over! What quantity has been reduced to cause her to fall? | Glorious Physics for Kids!
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Friction. Your embarrassing aunt (yes, you love her really) has suffered a blow to the ego due to friction taking a day off. Friction is when the movement of an object is slowed down by another surface. Friction is the force that allows a car to stop, and, if it wasn't present, a car would go on travelling forever!
| Take this scenario: (The two people will be the same distance from the middle) A small boy is sitting on one end of a seesaw (teeter-totter). If a really fat man jumps on the other side, what would happen to the child? | Glorious Physics for Kids!
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He would move upwards.. Basically, this is what everybody learns when they start going to the playground, but the physicists have to complicate everything - as usual! A man named Archimedes studied levers, which is what a seesaw is a type of.
Pluto. Pluto was discovered in 1930. Those mean astrophysicists and astronomers (space scientists) decided it was no longer worthy! Now, if any of you guys said Pacman, you really need to get off the computer! (After you have finished my quiz of course!)
| Gravity is the force which pulls things down to Earth. What is true about the force of gravity on the moon compared to Earth? | Glorious Physics for Kids!
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It is weaker.. The discovery of the force of gravity is often depicted as an apple falling on the head of the famous scientist, Isaac Newton. Gravity is present on the moon, though it is much weaker, which is why you see astronauts floating about!
| OK, you walk into a chemistry lab and your teacher says,'sorry about the smell of hydrogen sulphide'. What would the smell be similar to? | Glorious Chemistry for Kids!
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Rotten eggs. The chemical formula for hydrogen sulphide is H2S. This substance is responsible for a lot of the foul smells that come out of the chemistry lab. Though, sometimes you can have the most wonderful of smells. Esters smell like perfume and are also used in yummy pear drops!
I hope you enjoyed this chemistry quiz!
| You are doing an experiment with a substance called hydrochloric acid (HCl) when you accidentally spill some of it on to your hand. What should you do? | Glorious Chemistry for Kids!
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Tell a teacher and wash your hands immediately.. If you spill some acid on your hand, don't just wipe it off with your sleeve because that could damage your clothing and if you do nothing it could cause you harm (acids cause burns!). Now, technically throwing alkali on it will neutralise the substance but alkali can also be dangerous to have on your skin, since they can burn your skin too. You MUST tell your teacher and rinse your hand straight away under running water. Generally, for younger people the concentrations of the chemicals are very weak and won't be too dangerous, but be prepared just to be on the safe side.
| What is the name given to the chemical process in which a substance goes from being in a solid state straight to being a gas? | Glorious Chemistry for Kids!
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Sublimation. Sublimation is where the liquid phase is skipped and a solid substance can be changed straight into a gas. It can also work in the reverse direction - from a gas straight into a solid. A common example of sublimation in action is when dry ice "melts" - it goes straight from being in a solid state to being vaporous.
Alkali. This is one of the first general chemical equations you will learn as a chemistry student! Acid + Alkali (or base) --> Salt + Water. For all you eager young scientists, an acid has a pH of less than 7 (7 is the pH of neutral compounds) whilst an alkali has a pH greater than 7.
| One of the most recognisable parts of chemistry is the very helpful periodic table. This table helps to group certain elements together. One way they do this is by putting things into periods, but what is the other classification? | Glorious Chemistry for Kids!
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Groups. When the periodic table was set up, it was organised so that a period of elements moved across the table from left to right and a group moved from top to bottom. If you study chemistry to a moderately advanced level, you will be taught the reasons for this. A Russian man named Mendeleev devised the table.
| At around what age do our bones actually stop "growing", and therefore at what age do we start to degenerate into old age? | General Science For Kids
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28. Our skeletal bones are not totally "set" or ossified until we reach the age of around 28, so until that time we are actually still growing. Scientists are able to tell the age of a skeleton from the amount of ossification in the bones. Most of the cells in our body are replaced when old ones die, so in one sense we never stop growing. Metabolic changes start to occur though at around age 28, and our bodies actually start to "slow down", so unfortunately we start to "grow old".
A space containing absolutely nothing. A perfect vacuum exists ONLY when a space contains absolutely nothing at all. If a space contains so much as ONE atom, it is NOT a perfect vacuum. Even in outer space where there is no air, a total vacuum is not as common as you may think, because even outer space contains dust.
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