WHAT IS SCIENCE?Chapter 1

Key concept:

What is the goal of science?

SCIENCE:• Is an ________________

• Uses_______ to ______ events

• ______and organizes ______

• Deals only with __________

• Looks for _______ and

__________

organized method

Image from: http://www.erschools.org/Teachers/henderson/webquest/images/scientist.jpg

evidence explain

Collects information

natural world

patterns connections

Scientists:

_______________ that can be

_______ by ___________________

http://www.darvill.clara.net/enforcemot/graphics/newton.gif

propose explanations

TESTED

examining evidence

Science is ______________but

a ___________________Because of new tools, techniques,

& discoveries, our understanding of

science is __________________.

http://atmos.pknu.ac.kr/~swimm/wall/1024/EARTH.JPGhttp://www.npr.org/programs/fa/features/2005/04/flat_200.jpg

not “just facts”

“WAY OF KNOWING”

ALWAYS CHANGING

Our understanding of science is

_________ in _______ intelligent

________ about a wide variety

of _______ that affect our lives.

Renewable fuelsAIDS Global warming

Stem Cell Research

Bird flu

Alternative energy

Cancer Endangered species

Cloning Nuclear power Pollution

essential

decisions

issues

making

BIOLOGY

=__________________

= ________________Study of living things

BacteriaImage from: http://analyzer.depaul.edu/astrobiology/kingdoms.jpg

The science of “LIFE”

1.Made of _________

2. _____________

3. Based on a _____________________

4. _______ and ____________

5.______ & ___ ________ & _______

6. ________ to their ____________

7. ______________________________

8. As a group, __________________

Characteristics of ALL LIVING THINGS

cells

Reproduce

universal genetic code

Maintain a stable internal environment

Grow develop

Obtain use materials energy

Respond environment

change over time

ALL LIVING THINGS ARE: Made of cells

The _____ is the

______________.basic unit of life

http://sps.k12.ar.us/massengale/study_guides_bi.htm

CELL

ALL LIVING THINGS ARE: Made of cells

____________organisms are _____________made of only 1 cell

Image from: http://www.agen.ufl.edu/~chyn/age2062/lect/lect_06/bacsiz.GIF

(Ex: _________)

UNICELLULAR

bacteria

ALL LIVING THINGS ARE: Made of cells

_________________ organisms_______ as _________ but as adults are

_________________________

Ex: (___________

__________ )

MADE OF MANY CELLS

Images from:

http://www.angelbabygifts.com/

http://www.inclusive.co.uk/downloads/images/pics2/tree.gif

MULTICELLULARBEGIN ONE CELL

a human a tree

ALL LIVING THINGSReproduce

________________________

_____________the

___________________

from _____________

________________

Seen in animals and plants

SEXUAL REPRODUCTION

Family image from: http://babyhearing.org/Parenet2Parent/index.asp

combines

sperm + egg = baby

genetic material

2 parents

_________________________makes a new organismusing the ________________from _________________

Seen in bacteria, plants, and some animals

ASEXUAL REPRODUCTION

Planaria animation: http://www.t3.rim.or.jp/~hylas/planaria/title.htm

ALL LIVING THINGSReproduce

genetic material

ONLY 1 PARENT

All living things share a universal genetic code

Hereditary material = DNA______________________

________________ with instructions for one _________is called a ________.

DEOXYRIBONUCLEIC ACID

GENE

Image from: http://sbchem.sunysb.edu/msl/dna.gif

Segment of DNA

PROTEIN

_____________ organisms, like a bacterium, grow by ________________.

Image by Riedell

ALL LIVING THINGSGrow & develop

INCREASING in SIZE

SINGLE CELLED

Multicellular organisms grow bigger by __________________ AND _____________________.

increasing cell size

increasing cell number

Image from: http://www.bcps.org/offices/lis/models/life/images/grow.JPG

Image by Riedell

ALL LIVING THINGSGrow & develop

MULTICELLULAR ORGANISM don’t just contain MANY CELLS… but many _______________ of cells with _____________________

Image from: http://www.isscr.org/images/ES-cell-Fig-2.jpg

DIFFERENT KINDS

DIFFERENT FUNCTIONS

The ________________ EMBRYONIC STEM CELLS into different looking ADULT cells doing different jobs =

__________________________DIFFERENTIATION

Image from: http://www.ncu.edu.tw/~ls/graph/faculty_pictures/whole_time/SLC/SLC_lab-1.jpg

PROCESS OF CHANGING

_________________________

what makes them ___________ is_______________ are _______________________

See end of show for image sources

All cells have the SAME DNA...

WHICH GENESTURNED ON or OFF

different

It’s like having a whole library full of books, but reading only the books that are important to you.

http://www.adc.state.az.us/programs/offlibsvs.html

http://school.discovery.com/clipart/clip/report2.html

ALL LIVING THINGSTake in Materials & Use Energy

To________________,organisms _______ a constant supply of

____________________ &

____________

This sheep uses the MOLECULES and ENERGYin the food it eats tomake “more sheep”

grow and developneed

BUILDING MATERIALS

ENERGY!

http://ag.ansc.purdue.edu/sheep/ansc442/Semprojs/2003/spiderlamb/eatsheep.gif

ALL LIVING THINGSTake in Materials & Use Energy

___________ use energy from sunlight or chemicals to ________________

Ex: _____________ use ____________to turn _________ into _________

AUTOTROPHS

http://www.inclusive.co.uk/downloads/images/pics2/tree.gif

Image from: http://vilenski.org/science/safari/cellstructure/chloroplasts.html

make their own food

GREEN PLANTSphotosynthesis

glucose

ALL LIVING THINGSTake in Materials & Use Energy

______________ get their energy by___________________

Ex: ________ (including you) and _________________

HETEROTROPHS

Image from: http://www.epa.gov/region5/superfund/ecology/images/fishcartoon.gif

consuming other organisms

Animalsmost bacteria

The combination of all the _________________ through which an organism ________ or ___________ materials as it carries out its life processes

= ___________________metabolism

chemical reactionsbuilds up

breaks down

ALL LIVING THINGSRespond to their environment

A signal to which an organism responds= ___________________STIMULUS

Image from: http://www.travel-net.com/~andrews/images/animations/traffic.gif

ALL LIVING THINGSRespond to their environment

A stimulus can be_________________

Ex: When there is enough water and ground is warm enough, seed germinates. Roots respond to gravity & grow downward.Leaves respond to sunlight & grow up.

EXTERNAL

Image from: http://www.ccs.k12.in.us/chsBS/kons/kons/images/stimresp.jpg

http://www.nofretete-page.de/gemischtNeu/TN_plant_grow_w.JPG

ALL LIVING THINGSRespond to their environment

A stimulus can be____________

Ex: When the glucose level in your bloodstream becomes low, your body responds by making you feel hungry.

http://www.israellycool.com/eat%20guy%20AFP.jpg

http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookCHEM2.html

INTERNAL

VOCAB WORD

A cell works to keep conditions inside the cell constant = ______________________

IF temperature, water content, nutrients, acidity change too much

. . . the cell will die.

HOMEOSTASIS

HOMEOSTASIS involvesinternal __________ mechanisms

If body temp drops too low,“shivering” produces heat to warm you up.

http://www.dreamstime.com/thumb_4/1099235658Q3A4x8.jpg http://www.clipartheaven.com/clipart/seasons_&_weather/overheating_2.gif

If temp is too hot, “sweating” cools you down.

FEEDBACK

HOMEOSTASIS

Drinking a BIG GULP

increases the amount

of water in your body

http://pluck.typepad.com/photos/uncategorized/restroom_blog.gif

Your next stop gets rid of the excess water.(OSMOREGULATION)

http://www.me-go.net/rtw/images/biggulp.jpg

ALL LIVING THINGSas a group, change over time

= ______________

Allows _______ of ________ in a ___________

EVOLUTION

survivalspecies

changing world

http://cache.eb.com/eb/image?id=63386&rendTypeId=4

Muscle:http://chemistry.uca.edu/faculty/isom/4320_pdf/multimedia/web_ex/web_ex1/skeletalmuscle1.jpg

RBC: http://www.astrographics.com/GalleryPrints/Display/GP2120.jpg

Nerve: http://www.alongnaturestrail.com/the_nervous_system.html

Bone: http://ssm.hkcampus.net/~ssm-is/3.%20human_cell/bone_cell.jpg

Cheek: http://faculty.stcc.edu/nash/cheek1.jpg

SOURCES