Mastermind questions (lower intermediate)

SCIENCE
1. What does your heart pump?	_______________
2. Which is the nearest star?	_______________
3. Which is heavier, gold or silver?	_______________
4. How many sides does a triangle have?	_______________
5. What is H20?	_______________
6. How many legs does a butterfly have?	_______________
GEOGRAPHY
1. Which is bigger, a lake or an ocean?	_______________
2. Which country has the most people?	_______________
3. What is the capital city of Norway?	_______________
4. What is the biggest state in the U.S.A.?	_______________
5. Which country has the biggest land area?	_______________
6. In which ocean is Hawaii?	_______________
SPORTS
1. What sport is played at Wimbledon?	_______________
2. In which country will the 2008 Olympic Games be held?	_______________
3. What country does the football player Rivaldo come from?	_______________
4. What is the most popular indoor sport in the U.S.A.?	_______________
5. In which sport was Muhammad Ali the world champion?	_______________
6. Which famous golf player's mother comes from Thailand?	_______________
MUSIC
1. How many strings does a violin have?	_______________
2. Where was Ricky Martin born?	_______________
3. What pop group is Howie D. in?	_______________
4. Which singer usually sings rap music, Mariah Carey or Eminem?	_______________
5. Which instrument is often used in jazz music, a saxophone or a tuba?	_______________
6. What nationality is Robbie Williams?	_______________