Guess the size of microscopic things: five free practice rounds

• Pick the biggest. Tap the biggest of three or four things. The right one scores 100 points, any other scores 0.
• Rank by size. Tap four things from biggest to smallest, then lock in your order. Every pair in the wrong order costs points.
• Resize to real scale. Make one thing its real size next to another. What counts is how many times off you are: within about 2 % scores 100, and about 3 times too big or too small scores 0.

Each round is worth up to 100 points, so five rounds make 500. The rounds are untimed, and nothing is saved or ranked.

The app scores its rounds the same way. Read how scoring works for the details.

• The Prehistoric Life size game
• The Food & Drink size game
• The Nature size game
• The Military size game

Or try five practice rounds from every topic.