I believe carbon dating does work to determine the age of the earth but, the answer might be <u>D</u>. Let me know if it was right.
Answer:
a. food pellet
Explanation:
In classical conditioning, an unconditioned stimulus is the stimulus that naturally elicits an unconditioned response. The unconditioned stimulus is usually paired with a neutral stimulus, and after pairing with a neutral stimulus, the neutral stimulus becomes a conditioned stimulus that elicits a conditioned response alone.
In the experiment described above in the question, <em>the unconditioned stimulus is the food pellet,</em> which naturally elicits the response of the rat to wait at the far left corner of the cage. The neutral stimulus which is paired with the food pellet is the vanilla scent, which now becomes the conditioned response, when paired alone.
The answer to this is mechanic energy.
Answer:
La Tierra primitiva no tenía una atmósfera o agua libre. El planeta estaba demasiado caliente para que los gases y el agua se acumularan.
Explanation:
