Super Science Quiz for Kids: Fun Facts & Cool Questions!

Bright, bite-size science quiz for curious kids (6+). Explore animals, space, plants, and simple experiments—learn while having fun!

  1. What gas do we breathe in to live?
    1. Nitrogen
    2. Carbon dioxide
    3. Oxygen
    4. Helium
  2. Which of the following is a solid at room temp: water, ice, or steam?
    1. Vapor
    2. Water
    3. Steam
    4. Ice
  3. Why do we see rainbows after rain?
    1. Air pollution
    2. Wind currents
    3. Light refraction
    4. Temperature change
  4. Who first said Earth moves around the Sun?
    1. Nicolaus Copernicus
    2. Ptolemy
    3. Galileo Galilei
    4. Isaac Newton
  5. What planet is known as the Red Planet?
    1. Venus
    2. Mars
    3. Jupiter
    4. Mercury
  6. What tiny thing builds up to make bones and shells?
    1. Calcium
    2. Collagen
    3. Keratin
    4. Silica
  7. Which force pulls apples down from trees?
    1. Inertia
    2. Wind
    3. Gravity
    4. Magnetism
  8. What tool do scientists use to see tiny cells?
    1. Microscope
    2. Telescope
    3. Stethoscope
    4. Thermometer

Answers and explanations

  1. Question: What gas do we breathe in to live?
    Answer: Oxygen
    Explanation: Oxygen is the gas humans inhale to fuel cells and make energy; about 21% of Earth's air is oxygen, which is vital for metabolism and life. Fun fact: oxygen was discovered independently in the 1770s and made modern chemistry possible.
  2. Question: Which of the following is a solid at room temp: water, ice, or steam?
    Answer: Ice
    Explanation: Ice is the solid form of water that occurs at or below 0°C (32°F); it's important because it changes shape and properties when water freezes, affecting climate, ecosystems, and everyday life. An interesting fact: pure water expands when it freezes, so ice is less dense than liquid water and floats.
  3. Question: Why do we see rainbows after rain?
    Answer: Light refraction
    Explanation: Rainbows appear when sunlight bends and splits into colors as it passes through raindrops; this refraction and internal reflection separate white light into a spectrum. Fun fact: each raindrop disperses light at a specific angle, so the rainbow you see depends on the angle between you, the sun, and,
  4. Question: Who first said Earth moves around the Sun?
    Answer: Nicolaus Copernicus
    Explanation: Copernicus proposed the heliocentric model in the 16th century, replacing the long-held Earth-centered view; his idea sparked the Scientific Revolution and changed how we understand the cosmos.
  5. Question: What planet is known as the Red Planet?
    Answer: Mars
    Explanation: Mars is called the Red Planet because its surface is covered with iron-rich dust that looks red. It’s important because its past may hold clues about water and possible ancient life beyond Earth.
  6. Question: What tiny thing builds up to make bones and shells?
    Answer: Calcium
    Explanation: Calcium is a mineral that tiny particles of which build up in the body and in animals to make strong bones and shells. Fun fact: calcium is also essential for nerve signals and muscle function in animals and humans.
  7. Question: Which force pulls apples down from trees?
    Answer: Gravity
    Explanation: Gravity is the natural force that pulls objects toward Earth, causing apples to fall from trees; it shapes planetary motion and governs everyday events like drops and tides.
  8. Question: What tool do scientists use to see tiny cells?
    Answer: Microscope
    Explanation: A microscope magnifies tiny objects like cells so scientists can study their shape and parts; interestingly, modern microscopes can reveal structures as small as individual molecules.