What are we acing today?

This quiz will test your knowledge of one of the most remarkable buildings in the world.

Can you name those paintings by Francisco Goya?

Test your networks and operating systems knowledge.

Test your knowledge about Piet Mondrian! Did you know he really loved Disney's Snow White? Check it out!

What do you know about Rococo? Test your knowledge!

Evolution knowledge and definitions quiz. Questions about evolution of living organisms.

One of largest planets of Solar System - Uranus. Take the quiz ant test your knowledge.

Test your history knowledge of medieval Europe. Questions about most important dates.

Take the quiz about China. How much do you know about Asian country of China?

Test your knowledge of meiosis: its stages, how chromosomes behave in each division, where genetic variety comes from and what happens when the process goes wrong. 16 questions, each with an explanation.

Can you recognize all 20 standard amino acids from their structural formulas? Each picture shows one amino acid, and the answer options include molecules with similar side chains, so look closely. After every answer you will learn which feature of the side chain gives it away. Great practice for biochemistry, biology and molecular biology students.

Take your knowledge of acids further: acids in food and medicine, acid rain, industrial chemistry and what makes one acid stronger than another. Apply the naming rules to new elements and discover some surprising chemistry history along the way. Every answer comes with a short explanation.

Test your knowledge of the brightest stars in the night sky: Sirius, Canopus, Vega, Betelgeuse and more. Find out which constellations they belong to, what their names mean, why some stars look brighter than others, and which star will one day replace Polaris as the North Star.

Learn to read な に ぬ ね の and は ひ ふ へ ほ, tell apart look-alike characters such as ぬ and ね or は and ほ, and read simple Japanese words like ねこ, さかな and ふね. Also covers the ‘fu’ exception and why は is sometimes read ‘wa’.

Learn to read your first 10 hiragana characters, あ い う え お and か き く け こ, and use them to read simple Japanese words.

Learn to read the S row (さ し す せ そ) and the T row (た ち つ て と) of hiragana, including the three tricky exceptions: shi, chi and tsu. Practise single characters and simple words like すし (sushi), くつ (shoes) and ちかてつ (subway).

Part 4 of the Messier objects quiz: another 10 galaxies, nebulae and star clusters to recognise. A good test before a night of stargazing with a telescope.

Part 3 of the Messier objects quiz brings fainter, trickier deep-sky targets. Pick the right Messier number for each photo and learn a fact after every answer.

Messier catalogue quiz, part 2: 10 new deep-sky photos to identify. Galaxies, nebulae, open and globular clusters. Ready for a harder round than part 1?

8th grade natural selection practice test.