28
Lesson 28 of 84 · Timelines
Holidays and Traditions
Inventors have changed history. The light bulb, the telephone, and the computer were all inventions that changed how people live.
Key Facts
1
A timeline shows events in order.
2
Old photographs teach us about long ago.
3
Artifacts are objects from the past.
Check Your Understanding
Question 1
1 of 2What is an artifact?