Resource Detail: Science Object

Description

Science Objects are two hour on-line interactive inquiry-based content modules that help teachers better understand the science content they teach. This Science Object is the first of four Science Objects in the Science of Food Safety SciPack. It explores self-replicating life forms, which are all composed of cells. Living cells contain similar types of complex molecules that support the basic activities of life. These molecules interact in a soup, composed of about 2/3 water, surrounded by a membrane that controls what can enter and leave the cell. Cells have particular structures for cell functions, protection, and in some cases the ability to move. A single living cell represents the smallest individual unit of life. Single-celled organisms vary in the complexity of their structure and the amount of genetic material they contain, and populate all environments on Earth in astounding numbers and types. Those with less genetic material and simpler structures are more numerous. Bacteria are one type of single-celled organism that have an interdependent relationship with humans.

Ideas For Use

Science Objects are two hour learning experiences teachers can use to enhance their understanding of a particular scientific concept. Teachers can access any topic “on demand” from the Internet. Topics are based on the science literacy goals in the national standards (NSES, Science for All Americans, Benchmarks, and the Atlas of Scientific Literacy) and tied to state standards.

Each Science Object provides an understanding of the science content by providing a structured set of learning experiences through simulations and practice assessments. Science Objects challenge teachers to explore and explain real world phenomena and are founded on the principle that learners must be challenged with a problem, observation, data, etc., in order to develop scientific understanding. Science Objects utilize the five phases of inquiry-based learning: Engage, Explore, Explain, Elaborate, and Evaluate.

Learning Outcomes:

Science of Food Safety: Understanding the Cell's Importance

• Identify that cells are the fundamental units of life in both single-celled and multicellular organisms
• Denote the existence of a cell membrane and DNA as common characteristics shared by all cells
• Distinguish between cells that possess a cell nucleus and those that do not
• Identify that cell membranes can allow some materials to pass through while blocking others
• Identify the relative abundance (in biomass) of single-celled organisms compared to other existing life forms on Earth
• Identify examples of the many places on Earth where bacteria live
• Distinguish between viruses and cells by identifying the several unique characteristics of each

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