| A | B |
|---|
| Year of the Challenger accident. | 1986 |
| Point in the orbit in a planet or comet at which it is closest to the sun. | Perihelion |
| The unit of volume. | Liter |
| He discovered the theory of plate techtonics. | Wegener |
| Measures earthquakes. | Seismograph |
| The opposite flight force of thrust. | Drag |
| What does submarine mean? | Underwater boat. |
| The basic unit of life. | Cell |
| The measure ofpressure. | Pascal |
| The third system of the rainforest. | Floor |
| The highest system of the rainforest. | Canopy |
| The unit of weight. | Gram |
| Negative acceleration. | Deceleration |
| The causes an aircraft to rise. | Lift |
| the scientific study of the universe beyond the earth. | Astronomy |
| One theory of the origin of the solar system. | Big Bang |
| The unit of length. | Meter |
