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- BRIDGES
- Bridges are made of many _____1_____ materials all around the world.
- The earliest known bridges were made of _____2_____ stretched across gaps.
- Bridges were made by _____3_____ logs so longer distances could be spanned.
- After this less _____4_____ bridges were constructed with better techniques.
- One method was to_____5_____ several logs with rope, cable, or nails.
- different
- wooden
- small
- metal
- different
- string
- fiberglass
- logs
- girders
- logs
- measuring
- joining
- finding
- carving
- joining
- primitive
- modern
- covered
- difficult
- primitive
- fasten
- nail
- glue
- stretch
- fasten
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