Do all plants live on the land? Some plants do live in the water. To do this, they have evolved special traits. Plants that live in water are called aquatic plants. Living in water has certain benefits. There is certainly plenty of water! The plant does not need special traits to absorb, transport, or conserve water. They do not need a large root system. They do not need a strong stem to hold up the plant. The plant uses the water for support. Dont think water plants have it easy, though. They also face challenges. Living in water isnt that easy. They do need some special traits to survive. It is tough for the plant to reproduce. Pollination by wind or animals cant happen under water. Sunlight cannot reach very far beneath the waters surface. Some aquatic plants have floating flowers and leaves.

Question: "Is a large root system necessary for plants that live in water?"

Answer: "No"

Response: yes

Moscow (CNN) -- Divers have completed their search of a Russian cruise ship that sank last weekend with the loss of many lives, the Emergency Situations Ministry told CNN Friday. The official death toll has reached 114 -- including 66 women, 28 children and 20 men, the ministry said. The bodies of 15 people are still missing. There were 208 people on the "Bulgaria" at the time of the accident Sunday, of whom 79 were rescued. Divers have checked all the boat's compartments, the ministry said, and are now looking for more bodies around the boat as well downstream on the Volga River, where they could have been carried by the current. The area where search efforts continue has been enlarged to 200 kilometers (125 miles) from the scene, Russian Transport Minister Igor Levitin said at a briefing Friday. Preparations are under way for the cruise ship to be raised from the river bottom in the coming days. Two large boat cranes, one from Moscow and another one from Volgograd, which will be used for the lifting, are on the way to the accident site. "We have asked the Emergency Situations Ministry to keep 23 divers at the scene to continue the search for bodies even during the lifting operation," Levitin said. Specialist military divers were brought in mid-week to aid in the search efforts. Four people face criminal charges over the sinking of the ship, which Russian media have called the most devastating river accident in the country's history.

Question: "Who was brought in to aid the search"

Answer: "Specialist military divers were brought"

Response: yes

At the conference room table was White House Deputy Chief of Staff Joshua Bolten. Bolten watched the exchanges and, after what he called "a quiet moment,"suggested that the Vice President get in touch with the President and confirm the engage order. Bolten told us he wanted to make sure the President was told that the Vice President had executed the order. He said he had not heard any prior discussion on the subject with the President. The Vice President was logged calling the President at 10:18 for a twominute conversation that obtained the confirmation. On Air Force One, the President's press secretary was taking notes; Ari Fleischer recorded that at 10:20, the President told him that he had authorized a shootdown of aircraft if necessary. Minutes went by and word arrived of an aircraft down in Pennsylvania. Those in the shelter wondered if the aircraft had been shot down pursuant to this authorization. At approximately 10:30, the shelter started receiving reports of another hijacked plane, this time only 5 to 10 miles out. Believing they had only a minute or two, the Vice President again communicated the authorization to "engage or "take out" the aircraft. At 10:33, Hadley told the air threat conference call: "I need to get word to Dick Myers that our reports are there's an inbound aircraft flying low 5 miles out. The Vice President's guidance was we need to take them out." Once again, there was no immediate information about the fate of the inbound aircraft. In the apt description of one witness, "It drops below the radar screen and it's just continually hovering in your imagination; you don't know where it is or what happens to it." Eventually, the shelter received word that the alleged hijacker 5 miles away had been a medevac helicopter. Transmission of the Authorization from the White House to the Pilots The NMCC learned of United 93's hijacking at about 10:03. At this time the FAA had no contact with the military at the level of national command. The NMCC learned about United 93 from the White House.

Question: "Had there been previous intel regarding the low flying aircraft and what did it turn out to be?"

Answer: "Yes - a medevac helicopter"

Response: yes

If you build a campfire, you start with a large stack of sticks and logs. As the fire burns, the stack slowly shrinks. By the end of the evening, all that is left is a small pile of ashes. What happened to the matter that you started with? Was it destroyed by the flames? It may seem that way. What do you think happened? The truth is that the same amount of matter still exists. The wood changed not only to ashes, but also to carbon dioxide, water vapor, and other gases. The gases floated off into the air, leaving behind just the ashes. Although matter was changed, it was not created or destroyed. Because the same amount of matter still exists, we can say that matter is conserved. You may wonder how it can be conserved if something is now missing? Assume you had measured the mass of the wood before you burned it. Assume you had also trapped the gases released by the burning wood and measured their mass and the mass of the ashes. What would you find? The ashes and gases combined have the same mass as the wood you started with. This example illustrates the law of conservation of mass.

Question: "What happened to the matter changed to when burning a fire?"

Answer: "It changed to other gases"

Response:
yes