BECE Science Online Mock Quiz 3

This question assesses the understanding of nutrition and the importance of a balanced diet for overall health.

This question tests the concept of recycling and its role in sustainability by reducing the need for virgin materials.

This question assesses the understanding of the ecological impact of deforestation, specifically the loss of habitat for wildlife.

This question tests the knowledge of the environmental impact of industrial activities, particularly the generation of waste and emissions.

This question assesses the understanding of how technology has impacted agriculture, leading to greater efficiency and output.

This question tests the identification and use of traditional farming implements like the sickle.

This question tests the definition of weeding as a crucial agricultural practice.

This question tests the practical knowledge of common farming tools and their specific uses in agriculture.

This question tests the fundamental concept in physics that light is a form of energy.

This question assesses knowledge of the chloroplast's role as the site of photosynthesis.

This question tests the understanding of the cell membrane's function as a selectively permeable barrier.

This question tests knowledge of the nitrogen cycle, specifically the process of nitrification carried out by bacteria.

This question tests the property of bases (alkalis) to change the color of red litmus paper to blue.

This question assesses knowledge of the mitochondrion's primary role in cellular respiration and energy production.

This question tests the function of the pH scale in measuring the acidity or alkalinity of a solution.

This question requires the ability to distinguish a chemical compound from mixtures or elements.

This question tests the function of nitrogen-fixing bacteria in converting atmospheric nitrogen into forms that plants can absorb and use.

This question assesses the understanding of how decomposing plant matter adds organic material (humus) to the soil.

This question tests knowledge of soil profiles, specifically identifying the O horizon as the top organic layer.

This question tests the understanding of the role of humus (decomposed organic matter) in providing essential nutrients for plant growth.

This question tests knowledge of soil types, specifically the properties of clayey soil which has fine particles and high water retention.

This question requires identifying a biological process that occurs within the soil ecosystem, such as decomposition.

This question tests the biological term for cell division.

This question assesses the understanding of the cell wall's main role in providing structural support and protection to plant cells.

This question tests the knowledge that photosynthesis, the process of converting light energy into chemical energy, takes place in the chloroplasts of plant cells.

This question tests the fundamental biological concept that the cell is the basic structural and functional unit of all living organisms.

This question requires identifying which organelle is typically found in animal cells but not plant cells.

This question assesses understanding of the cell membrane's role in controlling the passage of substances into and out of the cell.

This question tests the function of the mitochondrion as the site of cellular respiration and energy (ATP) production.

This question tests knowledge of the nitrogen cycle, specifically the process of nitrogen fixation.

This question tests the function of the pH scale in measuring the acidity or alkalinity of a substance.

This question tests the property of acids to change the color of blue litmus paper to red.

This question tests the definition of a covalent bond, which involves the sharing of electron pairs between atoms.

This question tests the knowledge of common chemical formulas.

This question requires identifying a physical property (observable without changing the substance's identity) versus chemical properties.

This question tests the definition of an atom as the smallest particle of an element that still has the chemical properties of that element.

This question tests the knowledge of the key differences between compounds (fixed composition, not physically separable) and mixtures. The correct option is a distractor, as the actual difference is that mixtures have variable compositions, not compounds. However, based on the provided answer key, D is the intended correct answer.

This question tests the understanding of chemical changes, which are characterized by the creation of new substances.

This question assesses the ability to classify matter, identifying elements and compounds as pure substances.

This question tests the fundamental definition of an atom as the smallest unit of matter.