jen
Posts: 1
Joined: Sat Aug 25, 2007 8:55 pm

biology

Postby jen » Sat Aug 25, 2007 9:05 pm

I need to conduct an experiment to see if the following objects are living, nonliving, or once living: a rock, a grain of rice, styrofoam, and a seed. I'm not sure how to start. :(
I need to test to see if the following objects are living or nonliving: a rock, grain of rice, a seed, and a piece of styrofoam. I'm not sure how to conduct the experiment. Thanks.

Louise
Former Expert
Posts: 921
Joined: Mon Jan 16, 2006 2:17 pm

Re: biology

Postby Louise » Sun Aug 26, 2007 7:37 am

jen wrote:I need to conduct an experiment to see if the following objects are living, nonliving, or once living: a rock, a grain of rice, styrofoam, and a seed. I'm not sure how to start. :(


I'm not sure how you can do this either. Obviously, common sense provides the answer, but to do a scientific test is different. What you need to do is define the properties something alive has, and test for them. For example, wikipedia defines these properties as:
Properties common to these organisms—plants, animals, fungi, protists, archaea and bacteria—are a carbon- and water-based cellular form with complex organization and heritable genetic information. They undergo metabolism, possess a capacity to grow, respond to stimuli, reproduce and, through natural selection, adapt to their environment in successive generations.


Obviously, these characteristics are difficult to test without a very complicated lab. Did your teacher give you some definitions you can use?


Louise


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