Mastermind questions (lower intermediate)

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