Tuesday, March 17, 2020

Review of Indian Self-Government and Sovereignty in Canada essays

Review of Indian Self-Government and Sovereignty in Canada essays Ovide Mercredi, a Native rights advocate and an advisor for treaty and Aboriginal rights, taught Native studies at several universities such as McMaster University and University of Lethbridge. He was also the national chief of the Assembly of First Nations from 1991 to 1997. In his speech, Indian Self-Government and Sovereignty in Canada, Mercredi indicates that Canadas aboriginal people should have their own Self-Government and Sovereignty in order to conduct their own Indian affairs. Also, he gives several examples to distinguish between moral and political issues, and legal and constitutional issues, and makes suggestions on how Indian people can co-exist with the White community in Canada. Through the speech, Mercredi tries to persuade the audience that the laws and rules made by the provincial governments and the federal governments do not work for Indians. He believes this because of the different cultural background and historical issues. As he mentions, Canadas aboriginal people have been living in Canada for thousands of years. They had their own rules before European immigrants imposed their laws and regulations on Indians as the standard for human rights in Canada. Moreover, he points out that these double standards created by the government block the process of better co-existing between Indian community and major communities in Canada. Mercredi not only blames the rules made by Canadian government, but also tries to find solutions and gives suggestions for this moral and political issue. During his speech, Mercredi asks the audience to understand the needs of aboriginal people and to give them sovereignty to manage their own community not the delegated autho rity (270). One of the strengths of Mercredis speech is that he uses many historical and current issues to support his points. For instance, he mentions the recognition and protection of individual rights that the gover...

Sunday, March 1, 2020

Examples of Physical Changes and Chemical Changes

Examples of Physical Changes and Chemical Changes Are you confused about the difference between chemical changes and physical changes and how to tell them apart? In a nutshell, a chemical change produces a new substance, while a physical change does not. A material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced. Key Takeaways: Chemical and Physical Change Examples A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.Examples of chemical changes are burning, cooking, rusting, and rotting.Examples of physical changes are boiling, melting, freezing, and shredding.Often, physical changes can be undone, if energy is input. The only way to reverse a chemical change is via another chemical reaction. Examples of Chemical Changes A new compound (product) results from a chemical change as the atoms rearrange themselves to form new chemical bonds. Burning woodSouring milkMixing acid and baseDigesting foodCooking an eggHeating sugar to form caramelBaking a cakeRusting of iron Examples of Physical Changes No new chemical species forms in a physical change. Changing the state of a pure substance between solid, liquid, and gas phases of matter are all physical changes since the identity of the matter does not change. Crumpling a sheet of aluminum foilMelting an ice cubeCasting silver in a moldBreaking a bottleBoiling waterEvaporating alcoholShredding paperSublimation of dry ice into carbon dioxide vapor How to Tell Whether Its a Physical or Chemical Change? Look for an indication that a chemical change occurred. Chemical reactions release or absorb heat or other energy or may produce a gas, odor, color or sound. If you dont see any of these indications, a physical change likely occurred. Be aware a physical change may produce a dramatic change in the appearance of a substance. This doesnt mean a chemical reaction occurred. In some cases, it may be hard to tell whether a chemical or physical change occurred. For example, when you dissolve sugar in water, a physical change occurs. The form of the sugar changes, but it remains the same chemically (sucrose molecules). However, when you dissolve the salt in water the salt dissociates into its ions (from NaCl into Na and Cl-) so a chemical change occurs. In both cases, a white solid dissolves into a clear liquid and in both cases, you can recover the starting material by removing the water, yet the processes are not the same. Learn More 10 Examples of Physical Changes10 Examples of Chemical ChangesChemical and Physical PropertiesUnderstanding Chemical and Physical Changes Source Zumdahl, Steven S. and Zumdahl, Susan A. (2000). Chemistry (5th Ed.). Houghton Mifflin. ISBN 0-395-98583-8.