Easy Science Quiz!



By: John Miller

6 Min Quiz

Image: WALTER ZERLA/Cultura/Getty Images

About This Quiz

We humans use various scientific methods to explore Earth and even the outer reaches of the solar system and beyond. And as we all know, there are still many scientific mysteries waiting to be unveiled not only in our environments, but within our own bodies and minds, too. Were you really paying attention in your slate of science classes? Take this easy science quiz and prove it!

From Earth science like geology to life sciences like botany and ecology, there is a vast treasure trove of knowledge in our shared experiences. Do remember botany terms like “xylem” and “photosynthesis,” and could you really explain them to a fifth-grader? Do you understand basic animal classifications? And do you know what advantages mammals might have over their cold-blooded cousins?

How about astronomy? Can you pinpoint various stars and constellations high above our home on Earth? And do you understand how the chemical elements up there are so very similar to the ones found in your own bones? 

Are you a scientific Renaissance man or someone who preferred to sleep in class? Take this easy science quiz now!

How many bones are there in an adult human body?

You have fewer as they meld together. Adult humans have 206 bones when it's all said and done.


When it's safely streaming in the body, human blood is always which color?

Because veins often look bluish, there's a misconception that human blood is blue until it's exposed to the environment. That's not true -- human blood is always red.


Pure gold has a lot of interesting properties. Can you name one?

The purest gold is also the softest. So soft, in fact, that you can push and pull it like clay with your bare hands.


Conifers, like pine trees, always grow in triangular shape. Why is that?

Conifers use needles (instead of bigger leaves) for photosynthesis. With their triangular shape, the trees maximize light exposure all the greatest number of needles.


It's a quirk of biology. Babies do which action a lot less than adults?

Babies aren't big blinkers -- they often only blink a couple of times per minute. And scientists aren't sure why that’s the case.


It's not a trick question. How do chemical elements vary from place to place in the universe?

The same chemical elements are found most everywhere in the universe. These elements give scientists a starting point for comparisons and type of scientific experiments.


Pineapples and tomatoes are alike in this way. They're both what?

There are many different types of berries on Earth … and only a few have "berry" in the name. Tomatoes? A berry. The same goes for pineapples, oranges and a lot more.


What do Venus and Mercury have in common?

All of our solar system's planets have at least one moon. Except for Venus and Mercury … they have no moons at all.


Human teeth are as hard as what?

Just keep in mind that you're in over your head when you're swimming. Humans and sharks have teeth that are roughly the same toughness. But we do not advise that you test this theory in the water.


Photosynthesis is a highly tuned process. Plants use it to turn light into what?

Plants use light to generate chlorophyll, a greenish pigment that makes light absorption possible in the first place. This pigment is necessary for photosynthesis.


It's faster than a Corvette. How long does it take light to travel from the sun to Earth?

The sun is about 93 million miles away from Earth. Light travels at about 186,000 mph … meaning it takes about 8 minutes to cover the distances from there to here.


In evolutionary terms, which of the following creatures has been around the longest?

Cockroaches are living example of durability under all conditions. They've been around for 280 million years … that's tens of millions of years earlier than even the earliest dinosaurs.


Sometimes, names are confusing. The killer whale is actually what sort of animal?

Killer whales aren't whales. It's the largest type of dolphin … and it can be as long as 30 feet. Expert divers can swim with killer whales and even train them to do various tricks.


Can you finish this scaly fact? The Komodo dragon is the largest ______ on Earth.

They really are like dragons. Komodo dragons are Earth's heaviest lizards. Some of them can top 130 pounds, and they sometimes have an aggressive streak.


They're common tools in news stations. What does a barometer measure?

Barometers are critical tools for measuring atmospheric pressure. As this pressure rises and falls, weather forecasters can generate accurate predictions for a variety of conditions.


It's strange but true. Compared to air, how does sound travel in water?

You think sound travels fast through air? Try underwater -- when submerged, sounds travel about four times faster than those that are above the waves.


Sunshine has to work to get to your skin. How does air affect light?

Light is an energy beam made up of particles. Those particles slow down a tiny bit when they strike air, and even more when they try to pass through water.


Which chemical element -- by mass -- makes up most of the human body?

The most common element in the human body, by mass, is oxygen. Oxygen makes up about 65% of your total mass.


When women become pregnant, they slowly build up a lot more of what vital substance?

Pregnant women must support their own needs as well as those of a tiny fetus. She'll have 50% more blood in her body by the time week 20 rolls around.


It might not be what you think. What do camels store in their humps?

In popular legend, camels store water in their humps. But the humps are actually high in fat, which the camel burns when caloric intake is too low.


It's a rarity in nature. Which chemical element is liquid at room temperature?

Mercury is one of just two elements that are liquid at room temperature, one reason it is used in thermometers. The other is bromine.


How many times per year does the human heart beat?

The human heart is an incredible bit of natural engineering. Each year, it beats about 30 million times -- more than 100,000 times every day.


Don't let words fool you. The peanut is NOT what sort of thing?

Peanuts aren't nuts. They're a type of legume … or bean. But if you call it "bean butter" people will look at you funny.


The sounds just bounce around. Which animal is renowned for its use of echolocation?

Dolphins emit a vast array of clicks, whistles and other sounds. Those sounds are often an aspect of echolocation, in which the sounds bounce off underwater objects and return to the dolphin, which uses this information to locate various prey or obstacles.


It's all around you, right now. What's the most common chemical element in the universe?

Hydrogen, sweet hydrogen, is the most common chemical element. Without it (combined with oxygen) we'd have no water to drink.


It's dark at the bottom. How many Empire State Buildings could you stack in an AVERAGE part of the ocean?

Earth's oceans are crazy deep, on average more than 12,000 feet down. That's roughly eight Empire State Buildings … but there are places more than three times deeper.


Some people can't do it if they try. What's one unique trait about hamsters?

Almost all animals blink … and most of them move both eyelids at once. But hamsters are odd, blinking just one eye at a time, giving them a cute winking look.


Lightning strikes deliver about 300 kilovolts per bolt. What percentage of lightning strikes are fatal to humans?

The human body can withstand massive blasts of voltage -- about 90% of strike victims survive. Sadly, many of them experience permanent suffering from the strike.


The platypus generates venom, which it can inject via a spur on the hind foot. What's a common reaction when the venom is used on a human?

Platypus venom is an odd phenomenon in part because so few mammals create venom of any kind. When it hits a human, the stings are very painful but not lethal.


You're going to need some jigsaw puzzles to pass the time. If astronauts travel to Mars, how long will one leg of the journey take?

Mars is a tantilizing destination for many scienists. If astronauts do get to blast off for Mars, it will take them more than half a year -- or even eight months -- to get there.


You know lightning is very powerful. How hot does a bolt get?

Lightning kills about 50 Americans each year … so you know it's deadly. It's also hot -- about 54,000 degrees Fahrenheit.


A "supercell" can be deadly. Why?

A supercell is a notorious type of thunderstorm. Supercells can pummel the Earth for hours on end, spitting hail, lightning … and tornadoes.


Start hammering away. The vast majority of known elements are what?

We humans have discovered 118 elements. Roughly three-quarters of those elements are metals, many of which we use in vital tools in our everyday lives.


Call them snakes of the sea. How often can a dolphin shed and regenerate its top layer of skin?

Dolphin skin is amazingly smooth and soft. Why? The creature quickly sloughs off old dead skin cells, regenerating them every few hours.


It's a fascinating phase. "Triple point" is a phrase used to describe what?

At just the right combination of pressure and temperature, some elements reach their "triple point," in which they exhibit traits of gas, liquid and solid … all at once. In many cases, the triple point can be created in lab environments.


Explore More Quizzes

About HowStuffWorks Play

How much do you know about dinosaurs? What is an octane rating? And how do you use a proper noun? Lucky for you, HowStuffWorks Play is here to help. Our award-winning website offers reliable, easy-to-understand explanations about how the world works. From fun quizzes that bring joy to your day, to compelling photography and fascinating lists, HowStuffWorks Play offers something for everyone. Sometimes we explain how stuff works, other times, we ask you, but we’re always exploring in the name of fun! Because learning is fun, so stick with us!