Abiology teacher takes fish, algae, pond weed, invertebrates, and bottom muck from a local pond and establishes them in an aquarium. when the system is stable, the teacher seals it into a large, airtight glass box and leaves the box in a sunny location. after three months, the organisms in the aquarium appear alive and healthy. which of the following statements about the experiment is true? a. no energy has entered or left the glass box during the three months. b. during the three months, the biomass of animal life was greater than the biomass of plant life. c. some of the energy in the system has moved from one organism to another during the three months. d. the air in the glass box contains no carbon dioxide. e. some oxygen from water molecules has become part of organic molecules.

Schools are being forced to embrace computers. unlike their "digital immigrant" teachers, these students are "digital natives", born into a world where technology is an integral part of everyday life. almost every student has access to a multitude of computers, laptops and tablet devices. it would be crazy to assume an assignment would  notbe written on computer in this day and age.many schools now have a 1-to-1 computer policy, and many districts and states in the united states have mandated computers or ipads across the state for every student,  including los angeles, the second largest school district in the country.but the thing is, when they tried it in la, it wasn't the success they hoped for. that's because the tablets weren't used as much as they expected. rather, it appeared there was a gap between the digital native's love of technology and their use of it in the classroom.this conflicted relationship with computers is also underscored by much of the literature on education. it is also highlighted in professional development and conferences such as  edutech.

They are k strategist i think