Across
- 2. The speed of a train is expressed in
- 3. Motion of your hands while running.
- 6. world fastest animal
- 7. Motion of a child in a merry-go-round
Down
- 1. Motion of a train on a straight bridge.
- 2. Distances between two cities are measured in
- 4. The basic unit of time is
- 5. the earliest time piece on record is the