Which sentence describes energy flow through a natural (not manufactured) system?
a. a strong wind blows across a midwestern prairie.
b. the wind forces the blades of a wind turbine to rotate.
c. as the blades spin, the turbine converts mechanical energy to electrical energy. d. the electricity generated by the wind turbine is used to power nearby homes.

Read the sentence. “yesterday we arrived late for the outdoor concert in the city gardens.” which words in the sentence are adverbs? a. late; city b. yesterday; outdoor c. yesterday; late d. outdoor; city

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

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