Dr Jiminez Investigated the Influence of Snacking on the Onset

question 163

Multiple Choice

Dr. Jiminez investigated the influence of snacking on the onset of sleep in preschool children. One group of preschoolers ate a candy bar prior to bedtime, and the other group ate nothing. Time until the onset of sleep was recorded for each child. In this experiment, eating or not eating the snack is the __________ variable, and the time until the onset of sleep is the __________ variable.

• A)independent; dependent
• B)dependent; independent
• C)experimental; control
• D)control; experimental

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Definitions:

Energy Flow

The movement of energy through a food chain or ecosystem, typically from the sun through producers to consumers and finally to decomposers.

Trophic Level

The position an organism occupies in a food chain, based on its feeding relationships, ranging from primary producers to apex predators.

Ecosystem

A community of interacting organisms and their physical environment.

Community

A group of interacting living organisms sharing a populated environment.