| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | gravity | Space exploration | Understanding of gravity is crucial for successful space missions | 1 |
| 2 | gravity | Space exploration in the US | Gravity keeps objects on the ground and is a fundamental force in everyday life. | 1 |
| 3 | gravity | Space exploration in the US | Gravity is a force that must be overcome to achieve escape velocity and leave Earth's atmosphere during space exploration. | 1 |
| 4 | gravity | Space exploration in the United States | Considered a force to be overcome when launching spacecraft | 1 |