Wilbur Wright shares many ideas on pages 29-43. Review the key ideas of this section and sort them into the
correct order.

Wind resistance is a concern that
needs to be solved.

Wilbur and Orville confirm the
existence of tangential force.
The twentieth century will solve the problem of flight.

Wilbur estimates they will need atleast an engine weighing one hundred pounds.
He estimates the first flying machine will only reach low speeds.

Travel by land and water were
solved in the nineteenth century.

1. Key Idea 1
2. Key Idea 3
3. Key Idea 2
4. Key Idea 4
5. Key Idea 6
6. Key Idea 5