ATLANTA, Jan. 29 — A proposed set of guidelines for middle and high school science classes in Georgia has caused a furor after state education officials removed the word "evolution" and scaled back ideas about the age of Earth and the natural selection of species.

Educators across the state said that the document, which was released on the Internet this month, was a veiled effort to bolster creationism and that it would leave the state's public school graduates at a disadvantage.

"They've taken away a major component of biology and acted as if it doesn't exist," said David Bechler, who heads the biology department at Valdosta State University. "By doing this, we're leaving the public shortchanged of the knowledge they should have."

Although education officials said the final version would not be binding on teachers, its contents will ultimately help shape achievement exams. And in a state where religion-based concepts of creation are widely held, many teachers said a curriculum without mentioning "evolution" would make it harder to broach the subject in the classroom.

Georgia's schools superintendent, Kathy Cox, held a news conference near the Capitol on Thursday, a day after The Atlanta Journal-Constitution published an article about the proposed changes.

A handful of states already omit the word "evolution" from their teaching guidelines, and Ms. Cox called it "a buzz word that causes a lot of negative reaction." She added that people often associate it with "that monkeys-to-man sort of thing."

Still, Ms. Cox, who was elected to the post in 2002, said the concept would be taught, as well as "emerging models of change" that challenge Darwin's theories. "Galileo was not considered reputable when he came out with his theory," she said.

Much of the state's 800-page curriculum was adopted verbatim from the "Standards for Excellence in Education," an academic framework produced by the Council for Basic Education, a nonprofit group. But when it came to science, the Georgia Education Department omitted large chunks of material, including references to Earth's age and the concept that all organisms on Earth are related through common ancestry. "Evolution" was replaced with "changes over time," and in another phrase that referred to the "long history of the Earth," the authors removed the word "long." Many proponents of creationism say Earth is at most several thousand years old, based on a literal reading of the Bible.

Sarah L. Pallas, an associate professor of biology at Georgia State University, said, "The point of these benchmarks is to prepare the American work force to be scientifically competitive." She said, "By removing the benchmarks that deal with evolutionary life, we don't have a chance of catching up to the rest of the world."

The guidelines, which were adopted by a panel of 25 educators, will be officially adopted in 90 days, and Ms. Cox said the public could still influence the final document. "If the teachers and parents across the state say this isn't what we want," she said, "then we'll change it."

In the past, Ms. Cox, has not masked her feelings on the matter of creationism versus evolution. During her run for office, Ms. Cox congratulated parents who wanted Christian notions of Earth and human creation to be taught in schools.

"I'd leave the state out of it and would make sure teachers were well prepared to deal with competing theories," she said at a public debate.

Educators say the current curriculum is weak in biology, leading to a high failure rate in the sciences among high school students across the state. Even those who do well in high school science are not necessarily proficient in the fundamentals of biology, astronomy and geology, say some educators.

David Jackson, an associate professor at the University of Georgia who trains middle school science teachers, said about half the students entering his class each year had little knowledge of evolutionary theory.