A 1-kg mass at the surface of Earth weighs 9.8 N, but the same 1-kg mass at the surface of the Moon weighs only
1.6 N. What property of Earth and the Moon is most responsible for this difference in weight?

The Moon has less mass than Earth.

The Moon is rounder than Earth.

The Moon is larger than Earth.

The Moon is 385,000 km from Earth.

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla