1. Chess is a game that two people play with black and white pieces.
2. The time when you don't work or go to school on Saturday and Sunday is called weekend.
3. A drum is a musical instrument. You hit it to make sounds.
4. Someone who writes books is an author.
5. Something great is very big or very good.
6. Musicians record songs in a studio.
7. When you have a picnic you eat some food in a park or in the countryside.
9. When it's midnight it's twelve o'clock at night.
(8 и 10 не знаю)