101 True or False Science Quiz for Kids — free printable by Hey Smart Girl

The science quiz that guarantees at least one “no way!” moment — for every age

You know those afternoons when the boredom is almost visible? Or that long car journey where everyone runs out of things to say? Or the dinner table that needs something to liven it up?

This is for all of those moments. 101 true or false science questions covering physics, chemistry, biology and earth science — printed out, passed around, and argued over. Guaranteed to spark at least one “wait, WHAT?” per round. Guaranteed to get the whole family talking. And guaranteed that nobody — not even the adults — will get them all right.

Download the sheets, print for individuals, or split into teams for a fun STEM party activity. Perfect for the classroom, the dinner table, a science-themed birthday party, or just a slow Tuesday afternoon that needed something to happen.

Ready to download? Jump straight to the form →

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Long car journeys

Read them out loud and let everyone shout their answers. Time flies.

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Dinner table

One question per course. Prepare for debates that outlast dessert.

🎉

STEM party activity

Split into teams, keep score, crown the Smart Girl champion.

Get the free quiz →
101 True or False Science Quiz printable sheet preview — Hey Smart Girl free download

What’s inside the download?

A beautifully designed, print-ready quiz sheet — four pages of questions plus a full answer sheet to keep separate.

  • 25 Physics questions
  • 25 Chemistry questions
  • 25 Biology questions
  • 26 Earth Science questions
  • Score tracker per section
  • Full answer sheet with explanations
  • Name field and score boxes on the cover
  • Free for personal, classroom and party use

Think you know your science?

Here are six to get you started — no peeking at the answers.

🌈

Rainbows are full circles.

TRUE
💎

Diamonds and pencil lead are made of the same element.

TRUE
🩸

Blood is blue inside your body.

FALSE
🌋

The Earth’s core is hotter than the surface of the Sun.

TRUE
🥛

You can make plastic from milk.

TRUE
🧠

Humans use only 10% of their brain.

FALSE
Get all 101 questions free →

How it works

1

Enter your email

Sign up below and the quiz lands straight in your inbox.

2

Print it out

One copy each, or one between two for a team game.

3

Start the chaos

Read the questions, argue about the answers, learn something surprising.

Free download — sent to your inbox

Get your free science quiz

101 true or false questions covering physics, chemistry, biology and earth science. Print it off and see how many your family can get right.