c h. 1 b iology in the 21 st c entury. science is a way of thinking, questioning, and gathering...
TRANSCRIPT
![Page 1: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/1.jpg)
CH. 1 BIOLOGY IN THE 21ST CENTURY
![Page 2: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/2.jpg)
Science is a way of thinking, questioning, and gathering evidence.
![Page 3: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/3.jpg)
EARTH IS HOME TO AN INCREDIBLE DIVERSITY OF LIFE.
The biosphere includes all living things and all the places they are found.
biosphere = everywhere life exists
![Page 4: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/4.jpg)
Biodiversity generally increases from the poles to the equator.
Biodiversity is greater in areas with consistently warm temperatures.
• Biodiversity is the variety of life.
Biodiversity is greater closer to the equator.
![Page 5: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/5.jpg)
ALL ORGANISMS SHARE CERTAIN CHARACTERISTICS.
Biology is the scientific study of all forms of life (the study of living things).
![Page 6: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/6.jpg)
I. General Terms:
1. Science – a way of finding out about the physical
world2. Biology –
The study of living things
![Page 7: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/7.jpg)
All need energy for metabolism. (called?)
3. Organism – any living thing
– All are made of one or more cells.
– All respond to their environment.
– All have DNA that they pass on to offspring.
![Page 8: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/8.jpg)
II. Overview of science
![Page 9: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/9.jpg)
V. LEVELS OF ORGANIZATION
![Page 10: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/10.jpg)
III. The Scientific MethodA standardized means of organizing and evaluating information to reach a valid conclusion.
(easy definition- a step by step way to solve a problem)
![Page 11: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/11.jpg)
LIKE ALL SCIENCE, BIOLOGY IS A PROCESS OF INQUIRY.
Scientists make careful and systematic observations.
• Scientists test their hypotheses and analyze their data.
• Scientists form a hypothesis as a possible answer to a question.
• Scientists record observations as data.
![Page 12: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/12.jpg)
Stop use doc. Cam
Atom – element – compound – molecule – cell – tissue – organ – organ system – organism – population – community – ecosystem – biosphere
![Page 13: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/13.jpg)
GENERAL STEPS FOR THE SCIENTIFIC METHOD
1. Observe2. Define a problem3. Hypothesis4. Experiment5. Collect , Analyze and Record Data6. Form a Conclusion7. Scientific Theory………8. Scientific Law
![Page 14: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/14.jpg)
Terms expanded:Hypothesis – an idea that explains your observationsA valid hypothesis has three characteristics1. Testable2. Unbiased3. Repeatable
![Page 15: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/15.jpg)
If a hypothesis satisfies these criteria it can be accepted as a Scientific Theory
![Page 16: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/16.jpg)
A THEORY EXPLAINS A WIDE RANGE OF OBSERVATIONS.
Theories explain a wide range of observations and experimental results.
A theory is supported by a wide range of scientific evidence.
Theories can change based on new evidence.
![Page 17: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/17.jpg)
IV. OTHER CHARACTERISTICS OF SCIENCE
1. Objective
2. Subjective
![Page 18: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/18.jpg)
3. Quantitative
4. Qualitative
![Page 19: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/19.jpg)
5. Variable
6. Independent variable
7. Dependent variable
8. Control
![Page 20: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/20.jpg)
5. Dependant – the variable that changes because of what happens in the experiment. Graphed on the y axis
6. Independent – the variable that the experimenter changes – the one we are testing. Graphed on the x axis
7. Variable – a changeable factor ex. Temperature, time, food etc.
8. Control – a group that does not get tested. It is used as a “means” of comparison
![Page 21: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/21.jpg)
V. REVIEW OF THE SCIENTIFIC METHOD
1. Prefixes for the metric system
![Page 22: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/22.jpg)
VI. CHARACTERISTICS OF LIVING THINGS – SEE NEXT PPT. – THE NEXT SLIDES ARE JUST “TALKING” POINTS FOR IN CLASS
![Page 23: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/23.jpg)
ORGANISMS MUST MAINTAIN HOMEOSTASIS TO SURVIVE IN DIVERSE ENVIRONMENTS.
Homeostasis is the maintenance of constant internal conditions.
![Page 24: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/24.jpg)
Homeostasis is usually maintained through negative feedback.
Negative feedback systems return a condition to its normal (set) point.
• Homeostasis is the maintenance of constant internal conditions.
![Page 25: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/25.jpg)
Behaviors and adaptations can help maintain homeostasis.
![Page 26: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/26.jpg)
EVOLUTION EXPLAINS THE UNITY AND DIVERSITY OF LIFE.
Evolution is the change in living things over time. The genetic makeup of a population of a species
changes. Evolution can occur through natural selection of
adaptations. Adaptations are beneficial inherited traits that are
passed to future generations.
![Page 27: C H. 1 B IOLOGY IN THE 21 ST C ENTURY. Science is a way of thinking, questioning, and gathering evidence](https://reader030.vdocuments.mx/reader030/viewer/2022032605/56649e715503460f94b6f0e8/html5/thumbnails/27.jpg)
Evolution accounts for both the diversity and the unity of life.