Sunday, May 3, 2015
YOLO COUNTY NEWS
99 CENTS

Explorit Science Center: Jet propulsion in the ocean: Make a speedy octopus

octopuswernerkerstinW

Common Octopus

By
From page A4 | August 08, 2014 |

With eight legs to choose from, it’s no surprise that an octopus has lots of different ways to get around. They can crawl across the ocean floor or underwater rocks with their legs. Some have fins to help direct swimming.

But by far the fastest method is jet propulsion. The octopus can shoot itself through the water like a rocket!

Later this month, some of Explorit’s summer science campers will experiment with demonstrating this phenomenon. You can join them at home with a few simple supplies.

You will need: a balloon, some food coloring, a binder clip or snack clip and a tub of water. If you have a small pool, that works well also. The more room you can give the balloon to move around, the better.

Fill the balloon most but not all of the way with water. Add a drop or two of food coloring to help you tell the difference between the water in the “octopus” and the water in the pool.

Instead of tying off the end, clip it closed with the binder clip. That way you can easily release the balloon when you want to.

Gently place the balloon into one end of the tub of water. Make sure the body of the balloon is pointing toward the middle of the tub and the end of the balloon is pointed toward the side. Be careful; you don’t want it to pop!

When you’re ready for a show, unclip the end of the balloon and watch what happens. You should see the water inside the balloon rushing out and the balloon zipping around the tub as it deflates.

What’s going on here? It has to do with potential energy. When the balloon fills with water, it gets stretched out. Just like a rubber band, it will want to snap back as soon as it can.

When the balloon is unclipped and the water can start moving out, the sides of the balloon will start to snap back, squeezing the water out even faster. An octopus uses the same technique if it needs to make a speedy getaway.

An octopus can use its mantle (the round part of its body that houses its internal organs) like a balloon. It fills the mantle with water, and when it’s ready to take off, the octopus squeezes the water out of a small hole called the siphon.

The effect is just like unclipping the balloon except the octopus uses its muscles to squeeze out the water. As the water is ejected in one direction, it pushes the octopus in the opposite direction and, by changing the position and angle of the “jet” siphon, it can steer where it wants! The octopus gets propelled quickly through the water, allowing it to pounce on prey or evade a predator.

Fill your balloon up again and repeat the experiment as frequently as you like. Try adding different amounts of water to see if you can change the speed or distance your balloon octopus travels.

————
Explorit’s coming events:

* Explorit’s Beautiful World: Science and Art exhibition is open to the public every Wednesday, Saturday and Sunday from 1 to 5 p.m. and every Friday from 3 to 6 p.m. Admission is $5 per person; Explorit members, teachers and children 2 and under are free.
* Interested in membership? Think your Explorit membership may have lapsed? Call Explorit at 530-756-0191 to check or sign up.
* Birthday parties are back at Explorit. Call 530-756-0191 for more information or to book your party.
* Save the date: Sunday, Sept. 7, for the end-of-summer “Final Blast Festival and Chemistry Show.” This event celebrates the end of our Summer Science Camp season and is a fun way to start the new school year.

— Explorit Science Center is located at 3141 Fifth St. For more information call 530-756-0191 or visit www.explorit.org, or “like” Explorit on Facebook at www.facebook.com/explorit.fb.

Comments

comments

.

News

Breaking barriers: For Prieto, it’s all about hard work

By Lauren Keene | From Page: A1 | Gallery

 
Council to hear about drought pricing

By Dave Ryan | From Page: A1

 
For the record

By Enterprise staff | From Page: A2

 
Peaceful Baltimore demonstrators praise top prosecutor

By The Associated Press | From Page: A2

Nigeria: Nearly 300 freed women, children led to safety

By The Associated Press | From Page: A2

 
Graveyard thefts land three Woodlanders behind bars

By Lauren Keene | From Page: A3

Downtown altercation leads to injuries

By Anne Ternus-Bellamy | From Page: A3

 
Woman arrested for brandishing knife on overpass

By Anne Ternus-Bellamy | From Page: A3

Yolo DA launches monthly newsletter

By Enterprise staff | From Page: A3

 
Can plants talk? UCD prof will answer that question

By Special to The Enterprise | From Page: A3 | Gallery

A Scottish setting for local author’s next book

By Special to The Enterprise | From Page: A3

 
Indoor Fun Fly comes to Woodland

By Enterprise staff | From Page: A4

 
Free beginner yoga class offered

By Enterprise staff | From Page: A4

Video discusses surveillance of prostate cancer

By Special to The Enterprise | From Page: A4

 
NAMI support group meets May 10

By Enterprise staff | From Page: A4

Dr. G featured on the radio

By Special to The Enterprise | From Page: A4

 
Fee proposed on rail cars that haul oil, other flammables

By The Associated Press | From Page: A4 | Gallery

 
Internships move UCD doctoral students beyond academia

By Julia Ann Easley | From Page: A5 | Gallery

Make Mom a warm vanilla sugar scrub

By Enterprise staff | From Page: A6

 
The secret to Mother’s Day gifting success: Give time, not stuff

By Special to The Enterprise | From Page: A6

Letter book is series of collected missives thanking Mom

By The Associated Press | From Page: A7

 
If your mom fancies something fancy, consider a tea party

By The Associated Press | From Page: A7

Out of Africa and back to Davis: James Carey will give special presentation

By Kathy Keatley Garvey | From Page: A9 | Gallery

 
Big Day of Giving makes philanthropy easy

By Tanya Perez | From Page: A10 | Gallery

Tuleyome Tales: How are a snake and a mushroom alike?

By Special to The Enterprise | From Page: A12 | Gallery

 
Tuleyome hosts Snow Mountain camping trip

By Special to The Enterprise | From Page: A12 | Gallery

.

Forum

Please help Baltimore

By Letters to the Editor | From Page: B4

 
End of life doesn’t mean life must end

By Special to The Enterprise | From Page: B4 | Gallery

Advancing education for California’s former foster youths

By Special to The Enterprise | From Page: B4

 
With sincere gratitude

By Letters to the Editor | From Page: B4

A wonderful day of service

By Letters to the Editor | From Page: B4

 
Eyewitness to the ‘fall’ of Vietnam: It was not a bloodbath

By Special to The Enterprise | From Page: B5 | Gallery

He can’t give it up

By Creators Syndicate | From Page: B6

 
 
Dangers from prescription pills

By Special to The Enterprise | From Page: B6

.

Sports

 
Defending champ DHS clinches a baseball playoff berth

By Enterprise staff | From Page: B1

UCD softball splits with Titans

By Enterprise staff | From Page: B1 | Gallery

 
Trifecta of Devil teams open playoffs Tuesday

By Evan Ream | From Page: B1 | Gallery

Sports briefs: DHS boys win to reach lacrosse playoffs

By Enterprise staff | From Page: B3 | Gallery

 
Making memories at Aggie Stadium

By Wayne Tilcock | From Page: B3 | Gallery

Pro baseball roundup: Hudson pitches Giants past Angels

By The Associated Press | From Page: B12

 
UCD roundup: Aggie women speed past Hornets

By Enterprise staff | From Page: B12 | Gallery

.

Features

.

Arts

.

Business

Marrone opens new greenhouse

By Special to The Enterprise | From Page: A8

 
New firm helps students on path to college

By Wendy Weitzel | From Page: A8

 
Yolo County real estate sales

By Zoe Juanitas | From Page: A8

Arcadia partners on soybean trait to improve yield

By Special to The Enterprise | From Page: A8

 
.

Obituaries

.

Comics

Comics: Sunday, May 3, 2015

By Creator | From Page: B8