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4. a person who studies or works in science, especially to discover new facts
5. an idea or plan suggested for others to consider
8. a difficult task or situation that tests someone’s ability
10. situated in or relating to the north; belonging to the north part of a region
11. a sign or object that stands for something else
13. a building where goods are stored before distribution or sale
14. the measure of how hot or cold something is
15. a person who performs labor or a job
16. the state of being friends; a close relationship between people
19. to join or link together
21. able to cause harm or injury
22. a substance used to treat illness or injury

1. a system of government in which people choose their leaders by voting
2. an object used to hold or carry things, often for storage or transport
3. the power to affect how someone thinks or acts or how something develops
6. a group of animals or plants that are similar and can reproduce among themselves
7. a very powerful and influential country in world politics
8. the typical weather conditions over a long period in a region
9. the surrounding conditions or natural world in which people, animals, and plants live
11. to continue living or existing despite hardship
12. the beliefs, customs, arts, and behaviors of a group or society
17. to find or learn something for the first time
18. the ability to produce new and original ideas or things
20. the buying and selling of goods and services