Uestion 17 chapter 3.4.1. true/false: over r 70% of the earth's rocky surface is covered by basalt lavas that have erupted within the last 200 million years. true o false question 18 chapter 3.4.2. true/false: though it is covered with lava flows in many areas, no obvious volcanoes have been identified on the moon. true o false question 19 chapter 3.4.4. what infuence does the crushing pressure of venus' atmosphere (90 times that of earth) have on its volcanic eruptions? it causes the development of the tallest volcanoes in the solar system. o b. it causes most volcanic flows to be explosive. o c. it limits explosive eruptions and the height of any eruptive columns. o d. it causes lava to not flow far along the surface. question 20 chapter 3.4.6. which statement about jupiter's moon lo's volcanic activity is not true? o a it has the most active volcanoes in the solar system. o b. it has the tallest volcano in the solar system. o they are a result of tidal heating. o d. the lava flows tend to reach great distances (as far as s 700 km).