Radioisotope dating techniques
We don't know how long Adam worked the garden before God gave him another assignment.
The Hebrew word dasha tells us that God used processes identical to what we see on the earth today. Some Christians claim that God could have sped up the process so that it all this sprouting and growing happened within a period of 24-hours.Although many Christians claim this makes the days exactly 24-hours in length, the Hebrew word translated "day" in English actually has three literal translations; the daylight portion of a 24-hour day, a 24-hour day, and a long, unspecified period of time (as in "day of the dinosaurs").The Hebrew word translated "evening" also means "sunset," "night" or "ending of the day." The Hebrew word translated "morning" also means "sunrise," "coming of light," "beginning of the day," or "dawning," with possible metaphoric usage.More information and examples can be found in our article . The particulars are important, so let's look at what Genesis 1 says: Then God said, "Let the earth sprout vegetation, plants yielding seed, and fruit trees bearing fruit after their kind, with seed in them, on the earth"; and it was so.
Although some Christians claim the days of creation are exactly 24-hours in length, it is apparent from the literal reading of the Genesis 1 text that this is not so. And the earth brought forth vegetation, plants yielding seed after their kind, and trees bearing fruit, with seed in them, after their kind; and God saw that it was good.
In fact, the original biblical languages contained many fewer words than modern English, which means that the words in those languages had more different meanings.