Tuesday, October 28, 2008

Is scotch tape also an x-ray?

Scientists have discovered that scotch tape can make x-rays. Fifty years ago Russian scientists found that you can get evidence of x-rays from peeling tape off of glass. Now scientists have found that you can get a lot of x-rays if you peel scotch tape in a vacuum; in fact some researchers even made an x-ray of their fingers using that method. The tape did not make any x-rays where there was air though. In a new study the scotch tape was peeled off the roll at about one point two inches per second and pulses of x-rays, that were about one billionth of a second long each, came from very close to where the tape was being peeled. Then the electrons jumped from the top of the tape to the sticky part which was about two thousandths of an inch apart and slowed down. When they slowed down it caused x-rays to come off the tape. People are thinking about how this new discovery could be used to make an inexpensive x-ray machine for where electricity is to expensive or to hard to get. Jamies Hevezi says that this new discovery is "a very interesting idea, and I think it should be carried further in research."

Thursday, October 16, 2008

Class Response Blog- Ecology

In science class we are learning about ecology. Here are a couple of important terms we are learning about:
environment- all of the living and nonliving things that an organism may interact with
ecology- the study of the relationships of living things with one another and of living things with their environment
ecosystem- a unit that consists of all the living and nonliving that interact with one another in a given area
community- the part of an ecosystem that is living
population- a group of organisms that are in the same species and that live in the same area
habitat- the place where an organism lives and gets the resources it needs to survive
producer- an organism that can make its own food by using a source of energy to turn raw materials into food
consumer- an organism that is not able to make its own food
decomposer- an an organism that breaks down dead organisms bodies into simpler substances
food chain- a representation of a series of events when food energy and matter are transferred from one organism to another
food web- a diagram that has many overlapping food cahins in it