Science Standards Flashcards
6 cards from real DCAS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Science Standards flashcards as text
In Delaware Comprehensive Assessment System, what is the purpose of the scientific method in science standards?
Answer: To provide a systematic approach for investigating questions and testing hypotheses
The scientific method provides a structured, systematic approach for asking questions, forming hypotheses, designing experiments, collecting data, and drawing evidence-based conclusions.
What is a controlled variable in an experiment related to Delaware Comprehensive Assessment System?
Answer: A factor that is kept constant throughout the experiment
Controlled variables (constants) are factors that are deliberately kept the same throughout an experiment to ensure that any observed changes are due to the independent variable being tested.
Which level of biological organization represents the most complex in Delaware Comprehensive Assessment System science standards?
Answer: Ecosystem
The hierarchy from simplest to most complex goes: atom → molecule → cell → tissue → organ → organ system → organism → population → community → ecosystem → biosphere.
In Delaware Comprehensive Assessment System, what is homeostasis?
Answer: The body's ability to maintain a stable internal environment despite external changes
Homeostasis is the process by which biological systems maintain internal stability and balance (temperature, pH, glucose levels, etc.) while adjusting to changing external conditions.
What is the primary function of the mitochondria in cells relevant to Delaware Comprehensive Assessment System?
Answer: To produce energy (ATP) through cellular respiration
Mitochondria are the "powerhouses" of the cell, converting nutrients into ATP (adenosine triphosphate) through cellular respiration, providing the energy needed for cellular functions.
In Delaware Comprehensive Assessment System, what does pH measure?
Answer: The acidity or alkalinity of a solution on a scale of 0 to 14
pH measures the hydrogen ion concentration in a solution, indicating its acidity (pH 7) on a scale from 0 to 14.
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