1) democratic governments.
2) highly developed.
3) common currency.
4) no borders between countries.
400
Which event brought about the unification of the different kingdoms during the 15th century?
The marriage of Isabel I and Fernando II.
500
What four process are involved in the nutrition function of animals?
1) taking and digesting of food.
2) taking of oxygen for breathing.
3) the distribution of substances.
4) the excretion of residues.
500
What is the difference between the blood flowing into and out of the kidneys.
Kidneys filter the blood and extract waste products. Blood goes in dirty, comes out clean.
500
What is the difference between meteorites and a shooting star?
Meteorites are asteroids that hit a planet or a satellite and form craters. Shooting stars are small meteorites that disintegrate in our atmosphere.
500
What are the two Judicial powers in the EU?
The European Courts of Justice and the European Court of Auditors.
500
What were the main events of the first half of the 20th century and why were they important?
The First World War used new weapons like tanks, airplanes, and bombs. The Second World War used nuclear bombs for the first time and millions of people died.