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Biology Day 1. Solving Problems Using a Scientific Approach Scientific Method Scientific Method Problem Problem Hypothesis Hypothesis Experiment Experiment.

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Presentation on theme: "Biology Day 1. Solving Problems Using a Scientific Approach Scientific Method Scientific Method Problem Problem Hypothesis Hypothesis Experiment Experiment."— Presentation transcript:

1 Biology Day 1

2 Solving Problems Using a Scientific Approach Scientific Method Scientific Method Problem Problem Hypothesis Hypothesis Experiment Experiment Analysis Analysis Conclusion Conclusion Parts of an Experiment Parts of an Experiment Variables Variables Independent – changed by you Independent – changed by you Dependent – changed by to independent Dependent – changed by to independent Constant – stay the same Constant – stay the same Control – for comparison Control – for comparison

3 Organisms – Living organisms are diverse but share certain characteristics Organisms – Living organisms are diverse but share certain characteristics Properties of Life – Seven themes unify the science of biology Properties of Life – Seven themes unify the science of biology Cellular Structure and Function Cellular Structure and Function Reproduction Reproduction Metabolism Metabolism Homeostasis Homeostasis Heredity Heredity Evolution Evolution Interdependence Interdependence

4 Unifying Themes of Biology Cellular Structure and Function Cellular Structure and Function All living organisms are composed of cells All living organisms are composed of cells Reproduction Reproduction Living organisms reproduce, producing offspring similar to themselves Living organisms reproduce, producing offspring similar to themselves Metabolism Metabolism Living organisms obtain and use energy to stay alive, grow, and develop Living organisms obtain and use energy to stay alive, grow, and develop

5 Homeostasis Homeostasis All living organisms respond to their environment and are able to maintain homeostasis All living organisms respond to their environment and are able to maintain homeostasis Heredity Heredity All living things are able to pass on traits to their offspring through genes that are passed from parent to offspring each generation All living things are able to pass on traits to their offspring through genes that are passed from parent to offspring each generation Evolution Evolution Evolution has shaped all of lifes diversity Evolution has shaped all of lifes diversity Interdependence Interdependence All living organisms depend on one another and their environment All living organisms depend on one another and their environment

6 Solving Real World Problems Preserving our Environment Preserving our Environment Pollution of the atmosphere, extinction of plants and animals, and a growing demand for food are current environmental problems caused by the growing human population Pollution of the atmosphere, extinction of plants and animals, and a growing demand for food are current environmental problems caused by the growing human population

7 Improving the Food Supply Improving the Food Supply Genetic engineering is used to develop crops that require fewer fertilizers and pesticides Genetic engineering is used to develop crops that require fewer fertilizers and pesticides

8 Understanding the Human Genome Understanding the Human Genome Scientists are sequencing every human gene, which will be an invaluable tool in medical research Scientists are sequencing every human gene, which will be an invaluable tool in medical research

9 Fighting Disease AIDS and Cancer AIDS and Cancer Biological research and new technologies will help scientists battle diseases such as AIDS and cancer Biological research and new technologies will help scientists battle diseases such as AIDS and cancer

10 Emerging Diseases Emerging Diseases The past few years have seen the emergence of new diseases from other parts of the world such as West Nile virus The past few years have seen the emergence of new diseases from other parts of the world such as West Nile virus

11 Gene Therapy Gene Therapy Gene therapy will help scientists fight genetic disorders such as cystic fibrosis, muscular dystrophy, and hemophilia Gene therapy will help scientists fight genetic disorders such as cystic fibrosis, muscular dystrophy, and hemophilia

12 Observation: The Basis of Scientific Research Solving Scientific Puzzles Solving Scientific Puzzles All scientists have a certain way of investigating the world All scientists have a certain way of investigating the world Observation Observation Observation is the act of noting or perceiving objects or events using the senses Observation is the act of noting or perceiving objects or events using the senses

13 Stages of Scientific Investigation Collecting Observations and Asking Questions Collecting Observations and Asking Questions Scientists add to scientific knowledge by sharing observations and posing questions about observations Scientists add to scientific knowledge by sharing observations and posing questions about observations Forming Hypotheses and Making Predictions Forming Hypotheses and Making Predictions Forming and testing hypotheses, as well as making predictions, is important in scientific investigations Forming and testing hypotheses, as well as making predictions, is important in scientific investigations

14 Confirming Predictions Confirming Predictions In a controlled experiment, the independent variable is varied between the experimental and control groups. The measured variable is the dependent variable In a controlled experiment, the independent variable is varied between the experimental and control groups. The measured variable is the dependent variable Drawing Conclusions Drawing Conclusions Hypotheses can be supported or rejected, but never proven Hypotheses can be supported or rejected, but never proven

15 Viewing Conclusions in Context Viewing Conclusions in Context Many important scientific questions have more than one answer, such as determining the causes of the global decline in amphibians Many important scientific questions have more than one answer, such as determining the causes of the global decline in amphibians

16 Scientific Explanations Constructing a Theory Constructing a Theory A collection of hypotheses that have been repeatedly tested and are supported by a great deal of evidence forms a theory A collection of hypotheses that have been repeatedly tested and are supported by a great deal of evidence forms a theory


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