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Praxis Science 5905 Study Guide Questions and Answers Latest Version Rated A+
Describe the difference between acids and bases.✔✔ Acids release hydrogen ions (H+) in solution, while bases release hydroxide ions (OH-).
What role do decomposers play in the environment?✔✔ They break down dead organisms, returning nutrients to the soil.
What is biodiversity, and why is it important?✔✔ Biodiversity refers to the variety of life in an ecosystem, which supports resilience and stability.
How does natural selection drive evolution?✔✔ Organisms with traits better suited to their environment are more likely to survive and reproduce.
What is kinetic energy? 1 / 4
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✔✔ The energy an object has due to its motion.
Explain how weathering differs from erosion.✔✔ Weathering breaks down rocks in place, while erosion transports the broken-down material.
What is the greenhouse effect?✔✔ The trapping of heat by gases in Earth’s atmosphere, keeping the planet warm.
Define gravity.✔✔ Gravity is the force that attracts objects toward each other, especially toward Earth's center.
What is the primary function of the cell membrane?✔✔ The cell membrane controls what enters and exits the cell, maintaining the internal environment.
Explain the difference between mitosis and meiosis.✔✔ Mitosis produces two identical daughter cells for growth and repair, while meiosis produces four genetically different gametes for reproduction. 2 / 4
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How does photosynthesis benefit both plants and animals?✔✔ Plants produce oxygen and glucose through photosynthesis, providing oxygen for animals to breathe and food for energy.
What are the basic building blocks of proteins?✔✔ Amino acids are the building blocks of proteins.
Describe the role of enzymes in chemical reactions.✔✔ Enzymes act as catalysts, speeding up chemical reactions without being consumed.
What causes seasons on Earth?✔✔ The tilt of Earth's axis causes different hemispheres to receive varying amounts of sunlight throughout the year, creating seasons.
Define the law of conservation of energy.✔✔ Energy cannot be created or destroyed; it can only change from one form to another.
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What is the difference between a hypothesis and a theory?✔✔ A hypothesis is a testable prediction, while a theory is a well-supported explanation based on evidence.
How does an ecosystem maintain balance?✔✔ Through interactions among producers, consumers, and decomposers that recycle nutrients and energy.
What is the function of DNA in cells?✔✔ DNA contains genetic instructions used for growth, development, and functioning of organisms.
Explain the water cycle and its stages.✔✔ The water cycle includes evaporation, condensation, precipitation, and collection, continuously recycling water on Earth.
What is an atom?✔✔ The smallest unit of matter that retains the properties of an element.
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