Vocab in Context Unit 2 (Flying w/ the Sun) PRETEST

In today's __________ society, most work is done by machines.

• mechanized

• monoplane

• accelerated

• accessible

But as more power is needed, people have ___________, or altered, their ideas about possible energy sources.

• conducted

• mechanized

• accelerated

• modified

Pul MacCready had an idea for an airplane that used the sun's energy and its own __________ energy, the energy of motion, for its power.

• lightweight

• conducted

• accelerated

• kinetic

MacCready had been working sowly on the plane for several years, but when the energy shortage began in the 1970s, he __________ his efforts.

• accelerated

• harnessed

• conducted

• mechanized

Called the Solar Challenger, this ______ had only one set of wings.

• harness

• altimeter

• monoplane

• modified

Unlike planes built of heavy materials, the Solar Challenger was made of a ________ plastic and weighed only 217 pounds.

• lightweight

• kinetic

• accessible

• monoplane

Special energy cells collected the solar energy and converted it into electricity, which was ________ to the engine.

• conducted

• mechanized

• accelerated

• accessible

The test pilot flew the plane at a height of 11,000 feet, as measured by the _________, the altitude gauge in the plane.

• altimeter

• kinetic

• harness

• monoplane

The successful flight of the Solar Challenger proved that people can ___________, or control and use, the sun's energy.

• harness

• modified

• conducted

• accelerated

But solar energy is _________ only when the sun shines!

• accessible

• mechanized

• modified

• lightweight