Grade 5-8
Characteristics of Organisms
Identify the cell as the basic unit of life and the smallest unit that can reproduce itself. Give examples of single and multi-cellular organisms.
Explore and describe an understanding that plants, animals, fungi, and various types of microorganisms are major categories of living organisms. Each category includes many different species. Note that these categories are subject to change. Life does not always fit into neat categories (e.g., are viruses alive?)
NatureWorks Episodes
13. Species Diversity
Observe and explain that in single cells there are common features that all cells have as well as differences that determine their function. Compare the features of plant and animal cells noting similarities and differences.
Investigate and illustrate evidence that cell replication results not only in the multiplication of individual cells, but also in the growth and repair of multi-cellular organisms.
Present data to illustrate that all organisms, whether single or multi-cellular, exhibit the same life processes, including growth, reproduction and the exchange of materials and energy with their environments.
Describe ways that cells can differ in multi-cellular organisms, assuming different appearances and carrying out specialized functions.
Investigate and explain that complex multi-cellular organisms are interacting systems of cells, tissues, and organs that fulfill life processes through mechanical, electrical, and chemical means, including procuring or manufacturing food, and breathing and respiration.
Diversity and Adaptation of Organisms
Explain situations in which short-term changes in available food, moisture, or temperature of an ecosystem may result in a change in the number of organisms in a population or in the average size of individual organisms or in the behavior of individuals in a population. Explore through models and evidence ways in which long term changes may result in the elimination of a population or the introduction of new populations.
NatureWorks Episodes
12. Population Dynamics
15. Invasive Species
16. Life at Risk
Explore and illustrate that in both the short and long term (millions of years), changes in the environment have resulted in qualitative and quantitative changes in the species of plants and animals that inhabit the Earth.
NatureWorks Episodes
1. Adaptation
16. Life at Risk
Heredity, Reproduction and Development
Explain the importance of reproduction to the survival of the species. Students compare and contrast sexual and asexual (e.g., yeast) reproduction.
Investigate and describe processes by which organisms that have two parents receive a full set of genetic instructions by way of the parents' reproduction cells specifying individual traits from each parent. Offspring exhibit traits from each parent.
Illustrate an understanding that sorting and recombining of the genetic material of parents during reproduction produce the potential for variation among offspring.
Examine evidence and describe that there are minor differences among individuals from the same population or among individuals of the same species. Explore ways in which some differences are acquired by the individual and affect only that individual, while other differences can be passed on to the individual's offspring.
NatureWorks Episodes
13. Species Diversity
Ecosystems and Organisms
Present evidence that species depend on one another. Describe ways in which interactions of organisms with each other and non-living parts of their environments result in the flow of energy and matter throughout the system.
NatureWorks Episodes
9. The Wildlife Web I
10. The Wildlife Web II
11. Decomposers/Scavengers
Explore and illustrate how energy is supplied to an ecosystem primarily in the form of sunlight. Examine evidence that plants convert light energy into stored energy which the plant, in turn, uses to carry out its life processes. Describe how this serves as the beginning of the food chain for all animals.
NatureWorks Episodes
9. The Wildlife Web I
Observe and illustrate the variety of ways in which plants, animals, fungi, and microorganisms interact. Represent how matter is cycled and recycled through these interactions, and energy flows through ecosystems.
NatureWorks Episodes
9. The Wildlife Web I
10. The Wildlife Web II
11. Decomposers/Scavengers
Classify organisms according to the function they serve in a food chain (any single organism can serve each of these functions): production of food, consumption of food, or decomposition of organic matter.
NatureWorks Episodes
9. The Wildlife Web I
10. The Wildlife Web II
11. Decomposers/Scavengers