Sciencie stuff Dion Brinson

Life Sciences Explain that cells are the basic unit of structures and function of living organisms, that once life originated all cells come from pre- existing cells, and that there are a variety of cell types. Basic units of life We have evolved from single-celled organisms Different cells have different jobs.

The discovery of fossils of the same organisms exposed along the coasts of both Africa and South America supports the hypothesis that both landmasses were once joined together (first speculated on because of the remarkable fit between the two coastlines) and have since separated Radiation is the transfer of energy by electromagnetic waves, in this case sunlight. The sunlight shining on the student’s face will transfer thermal energy to her face. Conduction is the transfer of thermal energy through direct contact. The student’s feet are in direct contact with the warm sand. The warm sand transfers thermal energy to the student’s feet.

Life Science Eukaryotic Cell Has cell membrane  Allows material to enter and leave the cell. Nucleus-contains DNA Mitochondria-energy is stored and used, contains DNA ER- transportation system within the cell Ribosomes- protein is made Vacuoles- closets, store stuff

Life Science Cell Wall Function is protection, support, structure. Chloroplasts Contain chlorophyll Make the plant green Function is to produce food

Life Cells RBC Form is round Function is fit through our circulatory system Hair Form is wide on bottom and thin at top Function is for root stability hair formation Sperm Form head and tail Function is to swim by using the flagellum

Life Sciences Explain the characteristics of life as indicated by cellular processes and describe the process of cell division and development. Cells must divide to reproduce. Cells produce an exact copy of the cells they replace. Cells go through phases of change.  Prophase, metaphase, anaphase, telephase

Life Science meiosis

Life Sciences Explain the genetic mechanisms and molecular basis of inheritance. Form and function of Deoxyribose Nucleic Acid (DNA) Genes- traits Alleles- one part of two that make up a gene Mutations- is the only source of new genetic material Sex-linked traits- traits carried by either a male or female

Life Sciences Explain the genetic mechanisms and molecular basis of inheritance. Genotype  What you are, in your genes Bb- heterozygous dominant brown-eyes Phenotype  What you look like, photograph Brown-eyes

Life Sciences Explain the flow of energy and the cycling of matter through biological and ecological systems (cellular, organismal, and ecological). Starts with the Sun to primary producers to primary consumers to secondary and tertiary consumers

Life Sciences Explain how evolutionary relationships contribute to an understanding or the unity and diversity of life. Taxonomy Kingdom (5) Phyllum Class Order Family Genus Species  Sub-species Homo sapien sapien Canis lupus bailieyi Felis domesticus

Life Sciences Explain the structure and function of ecosystems and relate how ecosystems change over time. Biotic- living components of an ecosystem Abiotic-nonliving components of an ecosystem

Life Sciences Describe how human activities can impact the status of natural systems. GMOs- Genetically Modified Organisms  Scientist change the organism DNA to improve its ability to live  BT- Bacilis thuringensis has been added to cotton plants to produce a poison to protect it from bugs. Killing bugs, cotton is poisonous, cotton grows faster and bigger, grow more cotton, need more land, eliminates ecosystems, food chain is disrupted, poison goes through food chain.

Life Sciences Describe a foundation of biological evolution as the change in gene frequency of a population over time. Natural Selection- Charles Darwin “Origin of Species”- survival of fittest  Offspring are more likely to survive due to Genetic, traits, genes, alleles, mutations  Ability to reproduce  Ability to move  Ability to attract a mate  Ability to support family  Ability to get food  Genetics that allow you to grow

Life Sciences Explain how natural selection and other evolutionary mechanisms account for the unity and diversity of past and present life forms. Natural selection determines the survival of the fittest  Separates organisms to create diversity in our world.

Life Sciences Summarize the historical development of scientific theories and ideas, and describe emerging ideas.

Atomic Number Top number 79 The number of protons Symbol Latin, Name, Place, People. Atomic Weight Big number at bottom. Average of all the isotopes. Atomic Mass Isotopes Same element, different number of neutrons