21. What is the day that someone is born? 

【Birthday】

22. What plan shows how much money is available and how it will be spent? 

【Budget】

23. What is the name of a system of government in which the people elect their leaders? 

【Democracy】

24. What planet do we live on? 

【Earth】

25. What is the job of someone that looks after your teeth and gums? 

【Dentist】

26. What is the time period before noon called? 

【Ante meridian (A. M. )】

27. What is the time after noon called?

【 Post meridian (P. M. )】

28. What organ cardiologists specialize in? 

【Heart】

29. Which section of a newspaper gives the editor an opinion? 

【Editorial】

30. What instrument would you use to examine very small life forms? 

【Microscope】