Presentation is loading. Please wait.

Presentation is loading. Please wait.

Chapter 1: The Science of Life. The Science of Life Chapter 1 Table of Contents Section 1 The World of BiologySection 1 The World of Biology –What is.

Similar presentations


Presentation on theme: "Chapter 1: The Science of Life. The Science of Life Chapter 1 Table of Contents Section 1 The World of BiologySection 1 The World of Biology –What is."— Presentation transcript:

1 Chapter 1: The Science of Life

2 The Science of Life Chapter 1 Table of Contents Section 1 The World of BiologySection 1 The World of Biology –What is biology? What are the properties of life? Section 2 Themes in BiologySection 2 Themes in Biology –How is life diverse? What is interdependence? What is evolution? Section 3 The Study of BiologySection 3 The Study of Biology –How are problems solved in biology? Section 4 Tools and TechniquesSection 4 Tools and Techniques –What do you know about the microscope?

3 Section 1 The World of Biology Chapter 1 Biology What is Biology? the study of life The study of living things Questions that biologists (scientists that study biology) have: How do living things work? How do living things interact? How do living things change over time? How diverse are living things?

4 Section 1

5 Chapter 1 Click below to watch the Visual Concept. Visual Concept Biology Section 1 The World of Biology

6 Chapter 1 Characteristics of Life Living things share the same 7 characteristics 1.Cellular organization 2.Reproduction & Heredity 3.Metabolism 4.Homeostasis 5.Response to stimuli 6.Growth and development 7.Evolve

7 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Cellular Organization –Organization is the high degree of order within an organism’s internal and external parts and in its interactions with the living world. –A cell is the smallest unit of an organism that can perform all life’s processes.

8 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Organization and Cells –Multicellular organisms are made up of many cells and show a hierarchy of organization going from the smallest unit of matter, the atom, to the actual organism Atom, biological molecule, organelle, cell, tissue, organ, organism

9

10 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Reproduction –Living organisms produce new organisms like themselves –Is essential for the continuation of the species

11 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Heredity During reproduction, organisms transmit hereditary information to their offspring Hereditary information is contained in genes on strands of DNA

12 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Metabolism –Metabolism is the sum of all the chemical reactions that take in and transform energy and materials from the environment. –Includes photosynthesis, cellular respiration, digestion etc.

13 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Homeostasis –All living things have mechanisms that allow them to maintain stable internal conditions. Homeostasis is the maintenance of a stable level of internal conditions even though environmental conditions are constantly changing. –How do we maintain 98.6 degrees when we are cold? –How do we maintain 98.6 degrees when we are hot?

14 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Response to Stimuli –Another characteristic of life is that an organism can respond to a stimulus—a physical or chemical change in the internal or external environment.

15 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Growth and Development –The growth of living things results from the division and enlargement of cells. –Development is the process by which an organism becomes a mature adult.

16 Section 1 The World of Biology Chapter 1 Characteristics of Life, continued Change Through Time –Populations of living organisms evolve or change through time.

17 Section 2 Skip

18 Section 3

19 Section 3 The Study of Biology Chapter 1 Science as a Process Steps of the Scientific Method –The scientific method is a way scientists solve problems –There are 7 steps

20 7 Steps of the scientific method 1.Observation/ Question/ Problem 2.Research 3.Hypothesis 4.Predictions – predict based on a true hypothesis 5.Controlled experiment – only one variable is manipulated 6.Analysis of data 7.Conclusion

21 Chapter 1 Click below to watch the Visual Concept. Visual Concept Scientific Method Section 3 The Study of Biology

22 Chapter 1 Click below to watch the Visual Concept. Visual Concept Controlled Experiment and Variable Section 3 The Study of Biology

23 Chapter 1 Designing an Experiment, continued Performing the Experiment –The control group provides a normal standard against which the biologist can compare results of the experimental group. –The experimental group is identical to the control group except for one factor.

24 Section 3 The Study of Biology Chapter 1 Designing an Experiment, continued Performing the Experiment –The experimenter manipulates the independent variable. (manipulative variable) –The experimenter measures the dependent variable because it is is affected by the independent variable. (responding variable)

25 Chapter 1 Click below to watch the Visual Concept. Visual Concept Independent and Dependent Variables Section 3 The Study of Biology

26 Chapter 1 Drawing Conclusions Making Inferences –An inference is a conclusion made on the basis of facts and previous knowledge rather than on direct observations.

27 Section 3 The Study of Biology Chapter 1 Constructing a Theory A theory is a set of related hypotheses confirmed to be true many times, and it can explain a great amount of data. Examples of theories: Cell theory Theory of evolution With advanced knowledge and scientific tools, it may be possible to disprove a theory Example: spontaneous generation theory

28 Francisco Redi Didn’t believe the spontaneous generation theory that living things can spontaneously come to life from nonliving things – maggots from meat

29 Section 4

30 Section 4 Tools and Techniques Chapter 1 Microscopes as Tools Light Microscopes –A compound light microscope is a microscope that shines light through a specimen and has two lenses to magnify an image. –Four major parts of a compound light microscope are the ocular lens, objective lens, stage, and light source.

31 Section 4 Tools and Techniques Chapter 1 Microscopes as Tools Light Microscopes –The eyepiece magnifies the image. –The objective lens enlarges the specimen. –The stage is a platform that supports slides with specimens. –The light source is a light bulb that provides light for viewing images.

32

33 Section 4 Tools and Techniques Chapter 1 Microscopes as Tools, continued Magnification and Resolution –Magnification is the increase of an object’s apparent size. –Resolution is the power to show details clearly in an image.

34 Section 4 Tools and Techniques Chapter 1 Object Size and Magnifying Power of Microscopes

35 Section 4 Tools and Techniques Chapter 1 Microscopes as Tools, continued Electron Microscopes –In an electron microscope, a beam of electrons produces an enlarged image of the specimen. –Electron microscopes provide greater magnification and resolution than light microscopes.

36 Section 4 Tools and Techniques Chapter 1 Microscopes as Tools, continued Electron Microscopes –Scanning electron microscopes pass a beam of electrons over the specimen’s surface for better viewing the external surface of a specimen. –Transmission electron microscopes transmit a beam of electrons through a thinly sliced specimen for better viewing the internal structures of a specimen.


Download ppt "Chapter 1: The Science of Life. The Science of Life Chapter 1 Table of Contents Section 1 The World of BiologySection 1 The World of Biology –What is."

Similar presentations


Ads by Google