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