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What is Science?What is Science?
Note: not part of notes Note: not part of notes
What are the What are the limits to limits to
science?science?
Aliens????Aliens????
Bigfoot body found????Bigfoot body found????
What is Science?What is Science?
Science is an organized way of using Science is an organized way of using evidence to learn about the natural evidence to learn about the natural world.world.
The goal of science is to investigate The goal of science is to investigate and understand nature. Once you and understand nature. Once you understand nature, you can make understand nature, you can make predictions about nature.predictions about nature.
What types of What types of things can you things can you
predict?predict?
Weather (Katrina), Agriculture, Weather (Katrina), Agriculture, environmental problems, etc environmental problems, etc
Acid Rain Acid Rain
Biology:Biology: is the study of living things is the study of living things
Ex: mammals, fish, bacteria, Ex: mammals, fish, bacteria, insects, viruses???insects, viruses???
Biology involves a search for Biology involves a search for solutions to medical problemssolutions to medical problems
What are some problems?What are some problems?
Examples? West Nile, AIDS, Examples? West Nile, AIDS, Cancer, Clean water, endangered Cancer, Clean water, endangered species, wildlife management.species, wildlife management.
ArthritisArthritis
AllergiesAllergies
GangreneGangrene
When will you use biology to make When will you use biology to make personal decisions?personal decisions?
Exercise, food/diet, drugs, alcohol, Exercise, food/diet, drugs, alcohol, problem solving skillsproblem solving skills
How does a How does a theory develop?theory develop?
As data from numerous experiments As data from numerous experiments builds up, a certain hypothesis may builds up, a certain hypothesis may become so well supported that become so well supported that scientists consider it to be a scientists consider it to be a theory.theory.
AA theory is supported by a ton of theory is supported by a ton of evidence. evidence. ButBut it is not considered to be it is not considered to be absolutely true. absolutely true.
Ex: theory of plate tectonics, theory of Ex: theory of plate tectonics, theory of evolutionevolution
Theory of EvolutionTheory of Evolution
Characteristics of Living ThingsCharacteristics of Living Things
8 characteristics must be met in order 8 characteristics must be met in order for something to be “living”for something to be “living”
Try to brainstorm a fewTry to brainstorm a few
Characteristics of Living Things Characteristics of Living Things
1. All living 1. All living organisms are organisms are made of cells. made of cells.
-A cell is the -A cell is the
basic unit of lifebasic unit of life
Fill out the Pyramid Fill out the Pyramid
Organism
Organ Systems
Organs
Tissue
Cells
Prokaryotes vs eukaryotesProkaryotes vs eukaryotes
ReproductionReproduction
2. All living organisms must 2. All living organisms must reproducereproduce
-All living organisms must reproduce -All living organisms must reproduce sexually or asexually. sexually or asexually.
a. Life would come to an end a. Life would come to an end without reproduction without reproduction
ReproductionReproduction
DNADNA
3. All living organisms have a genetic 3. All living organisms have a genetic code (DNA)code (DNA)
-There is a reason why we look like -There is a reason why we look like our parents. DNA is a molecule that our parents. DNA is a molecule that gets passed down to the next gets passed down to the next generation. generation.
GeneticsGenetics
DNADNA
Life Cycle Life Cycle
4. All living organisms must grow4. All living organisms must grow
-All living organisms go through a life -All living organisms go through a life cycle. cycle.
Humans start off as sperm/egg, Humans start off as sperm/egg, embryo, zygote, fetus, infant, embryo, zygote, fetus, infant, teenager, etc…teenager, etc…
All living things must growAll living things must grow
EnergyEnergy
5. All living organisms need energy5. All living organisms need energy
-Organisms need energy to grow, -Organisms need energy to grow, develop, and reproduce. How do develop, and reproduce. How do you get energy?you get energy?
Humans= eating, plants= sun, Humans= eating, plants= sun, fungus=decomposing fungus=decomposing
Obtain EnergyObtain Energy
395 pound sumo wrestler395 pound sumo wrestler
Respond to Environment Respond to Environment
6. All living organisms must respond 6. All living organisms must respond to their environments to their environments
-Not a lot of organisms can survive a -Not a lot of organisms can survive a winter. What do they do?winter. What do they do?
a. Hibernate, migratea. Hibernate, migrate
Respond to Environment Respond to Environment
Ruby-throated HummingbirdRuby-throated Hummingbird
HomeostasisHomeostasis
7. All living organisms must maintain an 7. All living organisms must maintain an internal balanceinternal balance
--Homeostasis:Homeostasis: is the process in which is the process in which organisms maintain their internal balance organisms maintain their internal balance
If we eat, we have to excrete If we eat, we have to excrete (removal of waste) (removal of waste)
Plants take in CO2 and give off O2Plants take in CO2 and give off O2
HomeostasisHomeostasis
Evolution Evolution
8. All living organisms change over 8. All living organisms change over timetime
-This change is known as -This change is known as evolutionevolution
Change over timeChange over time