Science Common Assessment Unit #3

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What are microorganisms?

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Microorganisms are tiny living organisms that can only be seen under a microscope. They can be single-celled or multi-celled.

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Are all microorganisms harmful?

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No, not all microorganisms are harmful. Some are helpful and play important roles in processes like digestion and decomposition.

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What is the main function of plant cells in leaves?

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Plant cells in leaves primarily make sugar through photosynthesis, using sunlight, carbon dioxide, and water.

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What do mitochondria do in a cell?

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Mitochondria are known as the powerhouse of the cell; they produce energy through cellular respiration.

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Why are algae important for the environment?

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Algae are important because they produce a significant amount of Earth's oxygen through photosynthesis.

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What is photosynthesis?

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Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose.

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What is the role of chlorophyll in plants?

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Chlorophyll is the green pigment in plants that absorbs sunlight for photosynthesis.

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What is a cell?

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A cell is the basic unit of life, which can perform all life processes.

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What is the difference between single-celled and multi-celled organisms?

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Single-celled organisms consist of only one cell, while multi-celled organisms are made up of many cells that work together.

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What is the function of the nucleus in a cell?

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The nucleus is the control center of the cell, containing the cell's genetic material (DNA) and regulating its activities.

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