8/12/2019 H Unit 3 HowOldIsOld

1/16

UNIT 3

HOW OLD IS OLD?

Objectives:

Students will understand that the word old is a relative term.

Students will begin to understand the chronology of the major events

in the earths history.

Students will comprehend that their life can be visualized in a

chronological timeline.

Students will discover that many native cultures think of time in terms

of cycles.

Subjects: Science, ath.

Suggested time:!hree class periods. "or #ctivity $, it would be very

helpful to have another adult or older student to assist.

Materials:

%opy for students&Earth History Timeline student information sheet

'( ) *+, How Old Is Old? student activity sheet '( ) $+.

"rom the trunk& -eologic timeline rope and cards.

"rom the teacher& "or each student& colored paper strips clipped

together, scotch tape or stapler, pencil."or the teacher&Earth History Timelineteacher resource sheet '( ) /+.

Vcabular!:

"m#$ibia% &'am0"120ee0an+ vertebrate animal that lives part of its

life in the water and lays its eggs in the water.

'$r%lg! (an arrangement of events in the order in which they

occurred.

'el#$!sis ('S3340o0"530sis+, was the first dinosaur and its bones

were discovered at -host 6anch.

'!clical (moving in a spiral or circular path.)vlve (to change slowly or develop something new, often related to

a changing climate.

)*ti%cti% (the dying out of a species.

I%vertebrate (animal without a backbone.

Li%ear (moving in a straight line.

Timeli%e (a visual model of the events in chronological order.

7nit ( 0

8/12/2019 H Unit 3 HowOldIsOld

2/16

Vertebrate (animal with a backbone.

+ac,gru%d:

esa 8rieta is three million years old. !hat sounds very old until you

realize that the dinosaurs went e9tinct :; million years ago and the earth is

believed to be

8/12/2019 H Unit 3 HowOldIsOld

3/16

evidence is discovered, theories usually change.

"ctivit! .: /elgic Timeli%e

. Aefine chronology and discuss why it is

important to establish chronological order when

studying the past.

$. 39plain to the students that they will be

using a foot rope to represent the

8/12/2019 H Unit 3 HowOldIsOld

4/16

arm. !his represents the age of the earth. Bhere on your arm is

when people began living in what is now Dew e9ico@ 'The

answer is the tip of your fingernail.+

C"or some of the numbers on the timeline there is more than one card.

!his allows for different size classes. #djust the cards to the number

of students present by eliminating some of the duplicate numbers but

be sure that all $ numbers are used. 5ou may want to give students

more than one card if your class is small.

CC!o make your own geologic timeline, please see Directi%s 0r Ma,i%g a

/elgic Timeli%eat the end of this unit, at (0

8/12/2019 H Unit 3 HowOldIsOld

5/16

. Bas Aimetrodon a dinosaur@ =ow do you know@ ''o, it li&ed

before dinosaurs e&ol&ed and its legs went out to its sides)+

"ctivit! 3: 2ers%al Timeli%e

Teac$er #re#arati%: 3ither you or the students cut enough inch

by < inch colored strips so that each student has enough strips for hisFher

years of age. !hey may be multiple colors or just two different colors. 1t is

helpful if each student has his or her own Scotch tape or stapler.

I%trducti%: Aiscuss how the concept of timeline could be used to

show an individual life. 5ou may wish to ask students to bring in photos of

themselves at different ages. #sk the students to think of special events that

happened each year of their lives. ake the beginning of your own timeline

to show the students. 1f they have trouble thinking of events for each year,

they could use the names of their teachers.

. 8ass out 'or more depending on the age of your students+ four

inch long strips of different colored papers 'or two alternating

colors+ to each student. 1t would be helpful to have fastened the

sets of strips together with paper clips.

!eacher may wish to draw an e9ample on the board. ?n the

first strip have the student write hisFher name on the back of the

strip. !hen write birth at the left side. 7nder it, have students

write their birth dates. !ape or staple the second strip to the first

strip, end to end, with the tape on the back. ?n the left side of the

second strip, write stbirthday. %ontinue in this way until there

is a strip for each year. Dow have the students go back and write

an event that happened that year such as first tooth, first bike, etc.

$. #ll of the strips should now be taped or stapled together end to end

in chronological order. !hese can be displayed on a bulletin board

or sent home.

(. Aiscuss the term linear timeline that implies that time unfolds in

a straight line. 39plain that in many cultures, time is visualized as a

7nit ( 0 ;

8/12/2019 H Unit 3 HowOldIsOld

6/16

spiraling cycle. !his may be represented as a cyclical timeline.

Bhat does cycle mean@ Dame some cycles that you know about.

'moon phases, day0night, months in a year, life cycles, tires, etc)+

=ow can you turn your personal timeline into a cyclical timeline@

=ave students bend their first year strip into a circle and clip it.

!hen wind the timeline around this circle that represents one year.

#fter it is all rolled up, put the paper clip on the timeline to hold it

as a circle.

# slinky is another good way to illustrate a cyclical

timeline. 3ach coil can represent a year in someones life such as a

grandparent, parent, aunt or uncle. 8aper clips with small cards can

be placed on the coils where special events occurred such as

graduated from school, got married, birth of children, etc.

I%0rmal "ssessme%t:!he following >uestions or similar ones can be used as a class

review or as a written assignment.

1. =ow many years old are you@ Bhere is it represented on

your timeline@

2. =ow many years ago where you born@

3. Bhat was special about your ;thyear@

4. =ow many years ago was your (rdbirthday@

7nit ( 0 :

/ birthday piata2

8/12/2019 H Unit 3 HowOldIsOld

7/16

Dame GGGGGGGGGGGGGGGGGGGGG Aate GGGGGGGGGG

U%it 3 H1 Old is Old?

)"4TH HISTO45 TIM)LIN) Stude%t I%0rmati% S$eet

. 3arths crust hardened& 3)6 billion

!here was no life, no water, and no atmosphere. years ago

$. 2lue green algae& !his first life on earth was microscopic !)# billion

and lived in the sea. !oday we call it Spirulina. years ago

(. "ish& !hese animals were the first vertebrates in the sea. # million

!here was no life on land. years ago

8/12/2019 H Unit 3 HowOldIsOld

8/16

. !yrannosaurus re9& !his was the largest carnivore 1!# million

and its bones were found in southern Dew e9ico. years ago

$. "irst flowers& %olorful flowers and insect pollinators 1!# million

developed together. !his is called co0evolution. years ago

(. Ainosaurs went e9tinct& Scientists think that an asteroid 6# million

crashed into the -ulf of e9ico causing dust to darken the sky, years ago

killing the plants and eventually all the dinosaurs and many other

animals.

8/12/2019 H Unit 3 HowOldIsOld

9/16

U%it 3 H1 Old is Old?

)"4TH HISTO45 TIM)LIN) Teac$er I%0rmati% S$eet

. 3arths crust hardened& 3)6 billion!here was no life, no water, and no atmosphere. years ago

$. 2lue green algae& !his first life on earth was microscopic !)# billion

and lived in the sea. !oday we call it Spirulina. years ago

(. !rilobites& '!650loh0bites+ Dow the seas were full of 6 million

invertebrates like shells, crinoids, years ago

sponges, jellyfish

and giant trilobites.

8/12/2019 H Unit 3 HowOldIsOld

10/16

a huge fin on its back and looked like a dinosaur, but it wasnt. 45 million

1ts legs were bent out from its sides like an alligator, while a years ago

dinosaurs legs were attached under its body like an elephant.

1ts tracks were found in the red rocks at present day Iemez 8ueblo.

$. %onifers& !hese evergreen trees had cones, like pine cones, 45 million

with seeds. !he earlier plants reproduced with spores that did years ago

not have male and female parts.

(. %oelophysis& 'S3340o0"530sis+ !his was one of the first 44# million

dinosaurs and its fossil bones were discovered at -host 6anch. years ago

1t was a predator the size of a turkey and is the D State Ainosaur.

8/12/2019 H Unit 3 HowOldIsOld

11/16

$$. "irst horse& !hese early mammals developed in # million

Dorth #merica and were the size of a fo9. years ago

$(. 6ocky ountain uplift& 8ressure from inside the 3arth 3 million

pushed up the 6ocky ountains. years ago

$

8/12/2019 H Unit 3 HowOldIsOld

12/16

Dew e9ico, including the horse, the camel and the mammoth. years ago

Name 6666666666666666666666 Date 6666666666666

U%it 3 H1 Old is Old?

HOW OLD IS OLD? Stude%t "ctivit! S$eet

7sing theEarth History Timelinestudent information sheet and your math

skills, figure out the answers to these >uestions&

. =ow long did it take for life to begin on 3arth@ GGGGGGGG

$. =ow long did the age of dinosaurs last@ GGGGGGGG

(. =ow long ago did amphibians move onto land@ GGGGGGGG

8/12/2019 H Unit 3 HowOldIsOld

13/16

*. =ow long ago did the dinosaurs go e9tinct@ GGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

E. Aid the first

amphibians

eat insects@

Bhy or why not?

/. Bhat large predator hunted

Seismosaurus@ =ow do you know@ GGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

. Bas Aimetrodon a dinosaur@ =ow do you know@

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG

7nit ( 0 (

8/12/2019 H Unit 3 HowOldIsOld

14/16

U%it 3 H1 Old is Old?

Directi%s 0r Ma,i%g a /elgic Timeli%e

aterials&

large wooden rolling pin

feet of clothes line or light rope

$ inches of yarn

roll of inch clear tape

package of sticky long labels

black marker

tape measure ' at least $; feet+

$ discs ( F$P in diameter, of corrugated plastic or cardboard,perforated to fit over the ends of the rolling pin

-orilla -lue or other strong adhesive

8rocedure&

. %ut holes in plastic or cardboard discs to fit on rolling pin handles.

7sing strong glue, adhere a disc to each end of roller. #llow to cure.

$. !ape one end of the rope to the middle of the rolling pin with strong

tape. !ape the yarn onto the other end of the rope.

(. 4ay out the rope straight in a gym or hallway.

8/12/2019 H Unit 3 HowOldIsOld

15/16

;. Bith the tape measure and the teacher timeline key, measure the rope

to where numeral $ should be placed. D?!3& 5ou will need to makeyour timeline divisions appro9imate because of the length of time the

early periods take up.

!o reflect reality on a ft. long rope representing a total of

8/12/2019 H Unit 3 HowOldIsOld

16/16

protective bo9.

7nit ( 0 :