Science for Children Trivia

1. Who was the famous Greek mathematician and inventor who, legend has it, ran naked through the streets shouting "Eureka!" after making an important discovery in the bath?

From Quiz Famous Scientists for Kids

Answer: Archimedes

Archimedes, who lived in the third century BCE, was one of the greatest scientists of the ancient world. A popular story about him is that a king asked him to find out if a crown that had been made for him was pure gold or had been dishonestly mixed with silver. Archimedes understood that because gold is denser than silver it takes up less space, so if he could measure the volume of the crown, he could determine its purity, but he did not know how to do this. While getting into a bath, he noticed that the water level rose as he sank in. He realized that if he placed the crown in water, he could measure the amount of water displaced and compare this to the amount displaced by a block of pure gold of the same weight. If the crown was impure, then it would displace more water. Archimedes is said to have invented many useful devices such as a screw that could pump water out of the hold of a ship, and a giant claw attached to a crane that could lift an enemy ship out of the sea to stop it from attacking his city.

From Quiz Perfect, Prefect

Answer: Mars

Mars is the fourth planet from the sun. Mars is called as 'the red planet' due to the reddish appearance of iron oxide on its surface. Mars is the second smallest planet after Mercury.

From Quiz Basic Science for Kids

Answer: Hydrogen

Water covers 70% of the earth including oceans, rivers, lakes, ponds, and brooks. Of that only about 1% is potable or drinkable.

From Quiz Science for Kids

Answer: Oxygen

Oxygen is a chemical element. Its symbol is O and it comes in at number 8 on the periodic table. Although it comprises only one percent of the sun's mass, it's the most abundant element in the crust of our earth. We win! The sun itself is comprised of mostly hydrogen and helium, with much smaller amounts of other elements including oxygen, carbon, iron and neon.

From Quiz Science for Kids 2

Answer: 7

Acids have a pH value always less than 7. pH value stands for potential hydrogen. It tells us about the concentration of hydrogen ions in a solution. A pH less than 7 means a solution is acidic. A pH of exactly 7 indicates that a solution is neutral, like pure water. A pH value of more than 7 indicates the compound is basic.

From Quiz Science in the Stream

Answer: Hydrogen and Oxygen

Each little unit (molecule) of water contains two atoms of hydrogen, each attached to a single, central oxygen atom. Water comes in three forms depending on the temperature: as solid ice (very cold), as liquid water (cool to very warm temperatures) and as steam, a gas (very hot).

From Quiz Metric System Basics

Answer: Meters

An adult human usually has a height between 1.5 and 2 meters. A few people are taller than 2 meters, and some are shorter than 1.5 meters.

From Quiz All-in-One

Answer: Gold

The element symbol for gold is Au from its Latin name of aurum. The atomic number of gold is 79. Gold is the most malleable metal and because of this quality, Rutherford used gold foil for the experiments in which he discovered the nucleus of the atom.

From Quiz General Science for a Young Einstein

Answer: The Sun's energy is concentrated over a smaller area

Because the earth is a round object called a sphere, the light from the Sun doesn't fall evenly on its surface. If you imagine a beam of light falling at the equator and the same beam falling at the poles, because of the planet's shape the beam will be less concentrated nearer the poles (it's spread out over a larger area) and so the average temperature will be lower.

From Quiz I Know This Answer

Answer: Evaporation, condensation and precipitation (rainfall)

The rain cycle starts with evaporation of water from water bodies; it is followed by ascent of the warm air, leading to cooling and condensation of the water vapour. Finally, when the water molecules become large in size, they fall down as rainfall. And the cycle goes on and on.

From Quiz The wonderful world around us!

Answer: Burning wood releases energy

Burning requires a fuel (wood), oxygen from the air and a source of ignition (a match!). Burning, called combustion, is a chemical reaction that releases energy from the chemical bonds that make up the wood and this energy is released as heat.

From Quiz For Young Scientists

Answer: alloy

When you mix two or more metals (elements) together, no matter what the metals are, the finished product is called an "alloy". The very first alloy that human beings ever used is called 'meteoric iron'. It's a naturally occurring alloy of nickel and iron that was first discovered in meteors which had hit the earth many years ago.

From Quiz Here, There, Everywhere

Answer: Gravity

Gravity is the force that keeps us all anchored to the earth. Every time you jump and come back down, or drop a book, or throw a ball into the air and catch it as it comes back that is gravity at work. Without it everyone and everything on Earth would just float off into space.

From Quiz Extending the Science Branch

Answer: Reptiles

Oceanography is the study of oceans. The Pacific Ocean is the deepest ocean in the word at 13,740 feet deep. The deepest point in the Pacific Ocean is the Mariana Trench going even deeper at 36,200 feet. Herpetology is the study of reptiles and amphibians. The Greek word 'herpetos' means creeping.

From Quiz Fun Bag of Science!

Answer: Friction

Friction always acts on the opposite direction of the applied force. If there was no friction life on earth would be miserable! If it was not for friction things would have trouble stopping moving.

From Quiz A Science Quiz for Kids

Answer: Nucleus

The atom is a basic unit of matter. It consists of neutrons, protons and electrons.

From Quiz What Type of Program Do I Use?

Answer: A word processor

A word processor lets you check that you have spelt everything correctly and will enable you to undertake formatting of text and adding in images. It is designed to allow the entry of text in a straightforward fashion.

From Quiz A Physical With a Nurse

Answer: my weight on a scale

In order to determine your weight, the scale has two bars at the top that slide across the numbers. When the scale balances, the two numbers that the bars point to (when added together) is your weight. You may also have a scale at your house. Household scales are usually different from the ones you use at the doctor.

From Quiz Simply Science

Answer: spark

When you rub certain materials together, it can cause a buildup of electrical charges on their surfaces. Opposite charges attract and similar charges repel. Either of these charges can move to something with a neutral charge. Sparks occur in the extreme case of electrons being attracted to an object with a positive charge.

From Quiz Life on Earth

Answer: Conditions weren't good enough

Nothing lived on Earth for the first billion years of the planet's existence. The conditions were not right for life. There were no plants or animals of any kind. At the time, Earth was a dangerous place where life could not survive.

From Quiz General Science For Kids

Answer: Jupiter

According to the latest figures (January 2006), Jupiter has an amazing 63 moons! Saturn is second with 47, and Uranus is third with 27. Mars has two moons - Phobos and Demos.

From Quiz Superhero Science

Answer: Gravity

Gravity is a force that pulls objects together. It's what makes the Earth orbit the Sun and the Moon orbit the Earth -- it even pulls you a little closer to your computer, but so weakly that you can't feel it! The gravitational force between us and the Earth is what keeps us on the ground.

From Quiz 5th Grade Science

Answer: bacteria in the soil

Lightning fixes a small amount of nitrogen, but bacteria is the main source. The nitrogen comes from the ammonia and nitrates from animals' wastes.

From Quiz Science

Answer: Sodium and Chlorine

Table salt (sodium chloride) is made out of the elements sodium and chlorine. It is made up of one atom of each. Its chemical formula is NaCl. A little salt is needed for all human beings, but too much salt can lead to problems, like high-blood pressure.

From Quiz Measuring

Answer: millimetres

Ten millimetres make up one centimetre. Ants are usually very tiny, just a few millimetres long. The largest ants in the world are about three centimetres long.

From Quiz Can You Name The Season?

Answer: summer

The first day of summer, in the northern hemisphere, is known as "summer solstice".

From Quiz Science Mania

Answer: Oxygen and Hydrogen

Water is a highly useful liquid that affects our life in every possible way.

From Quiz More Fun Science for Kids

Answer: 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.

From Quiz Fun Science for Kids

Answer: 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.

From Quiz For All We Know

Answer: Due to gravity

Gravity is the force that pulls everything towards the Earth. So if you throw anything upward, it will be pulled back downward due to gravity. The faster you throw something upward, the higher it will go before it comes back down.

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