This Australian public holiday on 25 April commemorates those who served in war.
ANZAC Day
This iron tower in Paris was built for the 1889 World's Fair.
Eiffel Tower
This is the chemical symbol for water.
H2O
This flag has a blue cross with a yellow border on a red background, used by a Scandinavian country known for IKEA.
Sweden
This is the largest ocean on Earth.
Pacific Ocean.
This wall divided a German city from 1961 until it fell in 1989.
Berlin Wall.
This ancient defensive structure stretches thousands of kilometres across northern China.
Great Wall of China
This is the force that keeps us on the ground and makes objects fall.
Gravity
This country's flag features a green, white and orange vertical tricolour.
Ireland.
This is the longest river in the world
Nile / Amazon River
This ancient civilisation built the pyramids and mummified their dead.
Ancient Egyptians.
This sandstone monolith in the Northern Territory is sacred to the Anangu people.
Uluru
This gas do plants take in during photosynthesis.
carbon dioxide / CO2
This flag shows a Union Jack in the top left corner and four red stars on the right.
New Zealand
This is the world's largest desert.
Antarctica
This global conflict lasted from 1939 to 1945.
WW II
This ancient stone circle in southern England was built over 4,000 years ago.
Stonehenge
How many bones are there in a human body?
206
This flag has a white background with a green cedar tree in the centre, between two red bands.
Lebanon.
This is the deepest point in any ocean on Earth, located in the Pacific.
Mariana Trench / Challenger Deep
This disease killed millions across Europe in the 1300s.
Black Death / bubonic plague
This ancient Incan city sits high in the Andes mountains of Peru.
Machu Picchu
This planet is the hottest in our solar system, despite not being closest to the Sun.
Venus
This flag is black, red and gold in horizontal bands, flown by Europe's most populous country.
Germany
This mountain range separates Europe from Asia.
Ural Mountains