Experimental design: controlling variablesdamschen and her team were able to conduct a manipulative experiment to test their hypothesis: connecting patches promotes plant species richness in the patches. they cleared 30 large patches of forest at the savannah river site so that the patches all started with a plant species richness of zero. then they set up different treatments to simulate connectedness and lack of connectedness. they used strips of cleared land, called corridors, to connect patches. to control for the many variables present in a field experiment, it was critical that the experiment was designed properly. if the patches differed in more than the presence or absence of a corridor, it would not be properly controlled, and they could not be certain if their results were caused by the corridor, or some other variable. to test the hypothesis that corridors promote plant species richness, they created two types of patches, shown below. one patch, called the connected patch, was connected to a central patch by a 150-m corridor. a second patch, called the unconnected “winged” patch, was 150 m from the central patch but not connected by a corridor. this design enabled them to control for several factors. the total area of the patch plus the corridor, or the patch plus the wings was the same. the total amount of edge (perimeter of each patch) was similar between the two treatments. both patch types were the same distance from the central patch. below are 4 examples of ways damschen and her colleagues could have designed their experiment. identify what is wrong with each design.

Middle schoolhistory 5+3 pts 1. the pacific islands formed by coral reefs are called (1 point) a. volcanic. b. reefs. c. atolls. d. plates. 2. what is a reason few people have settled in the interior of australia? (1 point) a.no mineral wealth is in the area. b.land is too expensive. c.the area is too dangerous. d.the area has little water and arable land. 3. what was one effect of plate movement on the pacific region? (1 point) a.australia and new zealand became b.connected to north america. c.plate movement isolated many species. few volcanoes formed. d.the regional climate grew much colder. 4. you live on a small island in the pacific ocean. though beautiful, your island has poor soil for farming and few natural resources. you most likely live (1 point) a.on a densely populated island. b.on the south island of new zealand. c.in new guinea on a volcanic island off the coast of australia. d.on a low island. 5. which change would most likely have to take place first to encourage more human settlement in the outback? (1 point) a.the climate would need to get warmer. b.the winters would need to be milder. c.the region would need more fertile land and water d.people would need to build more cities there. 6. what would be an example of how the maori are reclaiming their culture? (1 point) a.learning english b.playing rugby and other sports c.studying maori culture in schools d.learning how to cook asian cuisine 7. what conclusion can correctly be made about british colonization of this area? (1 point) a.the british policies embraced the cultures of the original inhabitants. b.the british disregarded the cultures of the original inhabitants. c.the british had a neutral policy toward native cultures. d.none of the above plz answer these

What was one step that charlemagne took to unite his kingdom? a. he chose a single strong heir to inherit his throne. b. he drove muslim forces out of europe. c. he created and supported schools. d. he declared himself head of the catholic church.

Which fundamental freedoms do citizens of both washington and the united states have in common freedom of education freedom to assemble freedom of earnings freedom of religion freedom of speech