Stone Age

5. something important that happens
7. a person who studies past human life, by looking at objects and other evidence
9. what something is made of
12. a roof covering of straw or reeds
13. a way of showing events in order of when they happened, along a line
15. using science to invent new things or to solve problems
16. a layer of grass and soil held together by grass and plant roots
17. a time in the past before people could write
18. pieces of wood floating on the sea or carried by waves onto the shore

1. a tool with a blade for cutting down trees or chopping wood
2. something that people can use
3. objects made from clay and baked to become hard
4. a black material used for drawing and as fuel for fires
6. a barrier built across a river to hold back water
8. a person who studies the natural world by making observations and doing experiments
10. a place where people live and make a community
11. people who get their food by hunting animals and gathering plants
14. to teach to live and work with human beings
17. a large farming tool used to cut through soil