An Early Experiment by Van Helmont (1600s) Describes How He

question 36

Multiple Choice

An early experiment by Van Helmont (1600s) describes how he "grew a tree in a large pot and found that after five years, the amount of soil in the pot had not changed. He concluded that the increase in weight was due to the addition of water." At that time, the compounds in the air had not yet been identified. Today, you know that he only discovered half the story. Which additional experiment would provide evidence for the rest of the story?

• A) A very careful audit of the water taken in and lost by the tree would have revealed only half the added weight gained by the tree.
• B) Carbon is discovered as a major element in trees and is lacking in water molecules.
• C) Radioactive carbon in CO₂ in the air is soon located as part of tree structures.
• D) The critical experiment involves the conversion of nutrients in the soil.
• E) All but the nutrient conversion is correct.

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Definitions:

Effective Therapists

Therapy practitioners who demonstrate the ability to positively impact their clients' mental health through the application of evidence-based practices and interpersonal skills.

Clinician's Orientation

The philosophical or theoretical framework guiding a healthcare professional's approach to diagnosis, treatment, and patient care.

DSM-5

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, a comprehensive classification of mental disorders used by healthcare professionals.

Reliability

The degree to which an assessment tool produces stable and consistent results over multiple administrations or observations.