National Science Education Standards: Living In An Alkaline Environment WebQuest
National Science Education Standards, Grades 5-8
Grades 5-8: Physical Science-Content Standard B, Properties and Changes of Properties in Matter
- A substance has characteristic properties, such as density, a boiling point, and solubility. One can separate a mixture into the original substances using one or more of these properties.
- Substances react chemically in characteristic ways with other substances to form new substances (compounds) that have different characteristic properties.
- All organisms are composed of cells, and most organisms are single celled. Cells carry on the functions needed to sustain life, including making the materials it needs.
- All organisms must be able to obtain and use resources, grow, reproduce, and maintain stable internal conditions while living in a constantly changing external environment.
- Regulation of an organism's internal environment involves sensing the internal environment and changing physiological activities to keep conditions within the range required to survive.
- Species acquire many of their unique characteristics through biological adaptation, which includes changes that enhance survival and reproductive success in a particular environment.
- Water is a solvent, dissolving minerals and gases, which it carries to lakes and oceans.
- Internal and external processes of the earth system cause natural hazards, including the toxic build-up of naturally-occurring substances, such as minerals, salts, acids, and bases.
National Science Education Standards, Grades 9-12
Grades 9-12: Physical Science-Content Standard B, Chemical Reactions
- In acid/base reactions, hydrogen ions transfer between reacting ions, molecules, or atoms.
- A membrane surrounds each cell, separating it from the outside world. Cells carry out such functions as homeostasis, transport of molecules, and synthesis of new molecules.
- Most cell functions involve chemical reactions.
- Cell functions are regulated. This regulation allows cells to respond to their environment.
- Evolution is the consequence of the interactions of a finite supply of resources required for life and the ensuing selection of those offspring better able to survive and leave offspring.
- More than 3.5 billion years of evolution has filled every available niche with life forms.
- The distribution and abundance of organisms and populations in ecosystems are limited by the availability of matter and energy and the ability of the ecosystem to recycle materials.