WHAT IS SCIENCE? Chapter 1 Key concept: What is the goal of science? Interest Grabber.

WHAT IS SCIENCE?Chapter 1

Key concept:What is the goal of science?

Interest Grabber

Objectives

• Explain what is meant by science

• List and describe the characteristics of living things

Key Vocabulary

• Science• Biology• Cell• Sexual reproduction• Asexual reproduction• Metabolism• Stimulus• Homeostasis• Evolution

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

TESTEDexamining evidence

Science is ______________buta ___________________Because of new tools,

techniques,& discoveries, our

understanding ofscience 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 varietyof _______ that affect our lives.

Renewable fuelsAIDS

Global warming

Stem Cell Research

Bird flu

Alternative energy

Cancer Endangered species

Cloning Nuclear power Pollution

essentialdecisions

issues

making

BIOLOGY=__________________= ________________Study of living things

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

The science of “LIFE”

Click the image to play the video segment.

It’s Alive! Part 1 1A Part 2 1B

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


____________organisms are _____________made of only 1 cell

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

(Ex: _________)

UNICELLULAR

bacteria


_________________ 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 materialONLY 1 PARENT

All living things share a universal genetic code

Hereditary material = DNA______________________

________________ with instructions for one _________is called a ________.

DEOXYRIBONUCLEIC ACID

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

Segment of DNAPROTEIN

_____________ organisms, like a bacterium, grow by ________________.

Image by Riedell

ALL LIVING THINGS Grow & develop

INCREASING in SIZE

SINGLE CELLED

Multicellular organisms grow bigger by __________________ AND _____________________.

increasing cell sizeincreasing cell number

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

Image by Riedell

ALL LIVING THINGS Grow & 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 to make “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 PLANTS

sunlightphotosynthesis

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

Vocab wordthe 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


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


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 GULPincreases the amountof 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.jpgRBC: http://www.astrographics.com/GalleryPrints/Display/GP2120.jpgNerve: http://www.alongnaturestrail.com/the_nervous_system.htmlBone: http://ssm.hkcampus.net/~ssm-is/3.%20human_cell/bone_cell.jpgCheek: http://faculty.stcc.edu/nash/cheek1.jpg

SOURCES

Core High School Life SciencePerformance Descriptors

High school students performing at the

ADVANCED level:

predict how homeostasis is maintained within living systems;

predict the function of a given structure;


PROFICIENT level:

describe the relationship between structure and function;predict how life systems respond to changes in the environment;


BASIC level

recognize that different structures perform different functions;

identify DNA as the structure that carries the genetic code;

define homeostasis;

Core High School Life SciencePerformance Descriptors


ADVANCED level:

given a scientific discovery, evaluate how different societal,

cultural, and personal beliefs influenced the investigation and

its interpretation;


PROFICIENT level:

given a scientific discovery narrative, determine and describe how societal, cultural, and personal beliefs influenced the investigation and its interpretation;


BASIC level

given a scientific discovery narrative, identify the cultural and personal beliefs that influenced the investigation.

WHAT IS SCIENCE? Chapter 1 Key concept: What is the goal of science? Interest Grabber.

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