January/February 2018 – Vol. 31 No. 2

Introduction to the Scientific Method Lesson Plan

Posted: Saturday, September 1st, 2012

by Jeff Orlinsky

It is the start of a new year and you are looking for new way to start your class.  How about introducing the scientific method with this simple experiment? Your students will investigate how increasing salt solutions affect seed germination, and the results can be used to make connections to different topics in your class.

Grades: 7th – 12th Grade
Subjects: Biology / Life Sciences, Chemistry, Earth Sciences, English-Language Arts, Investigation and Experimentation, Life Sciences. Although this lesson would work in any science class, it is intended for a life science class.
Topics: Germination, salinization; Extensions:  osmosis, Human influences on the environment, plant growth.

Duration: 20 min Prep + 1 hour Activity + 1 hour Post

Setting: Classroom

Salt Lab Handout

soil salinity

Materials

Zip-loc bags, paper towels

NaCl concentrations  – 0, 0.25, 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 3.0 grams/100 mL H2O

Distilled water

Graduated cylinders, 25 mL

Seeds, i.e. radish, lettuce

Activity:

Introduce the topic of salinization of soils: soils and water contain minute quantities of dissolved minerals, and repeated watering and drying out of the soil increases the concentration of these minerals in the soil.  This is known as soil salinization.  Have students read the article, or parts of the article.

Preparation:  you can make the salt solutions ahead of time, or you can have the students make the salt solutions.  I have the students prepare the solutions, as this is my way of introducing metric systems and developing good measuring skills.  I group the students to lower my cost, and each group runs the control (no salt) plus one variable (salt solution).

Have the students place 10 seeds on a paper towel, fold the towel, and place it into a Ziploc bag. Next, the students add the solution to the Ziploc bag and close it securely.
Check the bags daily, and after the 4th day count the number of seeds that have germinated.

Have each group determine the percent of seeds that have germinated, and collect the data from the class, averaging counts where the different solutions were duplicated. In addition, have the students graph their data. In most cases, the results are very clear.  As part of the conclusion, have the students predict why the salt may be affecting the seed germination.

Throughout the year, I have my students return to this experiment, and I incorporate this experiment’s results into my lessons. For example, in my lessons on membranes and osmosis, I ask the students to review and update their conclusions.

Written by Jeff Orlinsky

Jeff Orlinsky

Jeff Orlinsky teaches science at Warren High School and is a member of CSTA.

7 Responses

  1. What a great idea for a lab. I think I will use this in my ecology unit!

  2. I really like this lab too! It seems that the links for the handout and article are no longer active, any chance you could email them to me or repost them? Thanks so much!

  3. Thank you for your comment Connor, I have updated the links!.

  4. […] September’s e-CCS, I introduced a lab about salinization and seed germination and one of the concepts illustrated was […]

  5. […] Lab Activity: How Salt Affects Seed Germination […]

  6. Hi Jeff,

    The link to the informational text is broken. Can you provide it for me? I would like to use this lab with teachers and students this year.

    Thank you!

  7. The link has been fixed

Leave a Reply

LATEST POST

California Science Test Academy for Educators

Posted: Thursday, February 15th, 2018

California Science Test Academy for Educators

To support implementation of the California Science Test (CAST), the California Department of Education is partnering with Educational Testing Service and WestEd to offer a one-day CAST Academy for local educational agency (LEA) science educators, to be presented at three locations in California from 8:30 a.m. to 3:30 p.m. As an alternative to traveling, LEA teams can participate virtually via WebEx on one of the dates listed below.

The dates and locations for the CAST Academy are as follows:

  • Monday, April 23, 2018—Sacramento
  • Wednesday, April 25, 2018—Fresno
  • Thursday, April 26, 2018—Irvine

The CAST Academy will help participants develop a deeper understanding of the assessment design and expectations of the CAST. The academy also will provide information and activities designed to assist educators in their implementation of the California Next Generation Science Standards and three-dimensional learning to help them gain an understanding of how these new science assessment item types can inform teaching and learning. The CAST Academy dates above are intended for school and district science instructional leaders, including teacher leaders, teacher trainers, and instructional coaches. Additional trainings will be offered at a later date specifically for county staff. In addition, curriculum, professional development, and assessment leaders would benefit from this training.

A $100 registration fee will be charged for each person attending the in-person training. Each virtual team participating via WebEx will be charged $100 for up to 10 participants through one access point. Each workshop will have the capacity to accommodate a maximum of 50 virtual teams. Each virtual team will need to designate a lead, who is responsible for organizing the group locally. Registration and payment must be completed online at http://www.cvent.com/d/6tqg8k.

For more information regarding the CAST Academy, please contact Elizabeth Dilke, Program Coordinator, Educational Testing Service, by phone at 916-403-2407 or by e‑mail at caasppworkshops@ets.org.

Written by California Science Teachers Association

California Science Teachers Association

CSTA represents science educators statewide—in every science discipline at every grade level, Kindergarten through University.

Accelerating into NGSS – A Statewide Rollout Series Now Accepting Registrations

Posted: Friday, January 19th, 2018

Are you feeling behind on the implementation of NGSS? Then Accelerating into NGSS – the Statewide Rollout event – is right for you!

WHO SHOULD ATTEND
If you have not experienced Phases 1-4 of the Statewide Rollout, or are feeling behind with the implementation of NGSS, the Accelerating Into NGSS Statewide Rollout will provide you with the greatest hits from Phases 1-4!

OVERVIEW
Accelerating Into NGSS Statewide Rollout is a two-day training geared toward grade K-12 academic coaches, administrators, curriculum leads, and teacher leaders. Check-in for the two-day rollout begins at 7:30 a.m., followed by a continental breakfast. Sessions run from 8:00 a.m. to 4:15 p.m. on Day One and from 8:00 a.m. to 3:30 p.m. on Day Two.

Cost of training is $250 per attendee. Fee includes all materials, continental breakfast, and lunch on both days. It is recommended that districts send teams of four to six, which include at least one administrator. Payment can be made by check or credit card. If paying by check, registration is NOT complete until payment has been received. All payments must be received prior to the Rollout location date you are attending. Paying by credit card secures your seat at time of registration. No purchase orders accepted. No participant cancellation refunds.

For questions or more information, please contact Amy Kennedy at akennedy@sjcoe.net or (209) 468-9027.

REGISTER

http://bit.ly/ACCELERATINGINTONGSS

DATES & LOCATIONS
MARCH 28-29, 2018
Host: San Mateo County Office of Education
Location: San Mateo County Office of Education, Redwood City

APRIL 10-11, 2018
Host: Orange County Office of Education
Location: Brandman University, Irvine

MAY 1-2, 2018
Host: Tulare County Office of Education
Location: Tulare County Office of Education, Visalia

MAY 3-4, 2018
Host: San Bernardino Superintendent of Schools
Location: West End Educational Service Center, Rancho Cucamonga

MAY 7-8, 2018
Host: Sacramento County Office of Education
Location: Sacramento County Office of Education Conference Center and David P. Meaney Education Center, Mather

JUNE 14-15, 2018
Host: Imperial County Office of Education
Location: Imperial Valley College, Imperial

Presented by the California Department of Education, California County Superintendents Educational Services Association/County Offices of Education, K-12 Alliance @WestEd, California Science Project, and the California Science Teachers Association.

Written by California Science Teachers Association

California Science Teachers Association

CSTA represents science educators statewide—in every science discipline at every grade level, Kindergarten through University.

The Teaching and Learning Collaborative, Reflections from an Administrator

Posted: Friday, January 19th, 2018

by Kelly Patchen

My name is Mrs. Kelly Patchen, and I am proud to be an elementary assistant principal working in the Tracy Unified School District (TUSD) at Louis Bohn and McKinley Elementary Schools. Each of the schools I support are Title I K-5 schools with about 450 students, a diverse student population, a high percentage of English Language Learners, and students living in poverty. We’re also lucky to be part of the CA NGSS K-8 Early Implementation Initiative with the K-12 Alliance. Learn More…

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Written by NGSS Early Implementer

NGSS Early Implementer

In 2015 CSTA began to publish a series of articles written by teachers participating in the California NGSS k-8 Early Implementation Initiative. This article was written by an educator(s) participating in the initiative. CSTA thanks them for their contributions and for sharing their experience with the science teaching community.

2018 CSTA Conference Call for Proposals

Posted: Wednesday, January 17th, 2018

CSTA is pleased to announce that we are now accepting proposals for 90-minute workshops and three- and six-hour short courses for the 2018 California Science Education Conference. Workshops and short courses make up the bulk of the content and professional learning opportunities available at the conference. In recognition of their contribution, members who present a workshop or short course receive 50% off of their registration fees. Click for more information regarding proposals, or submit one today by following the links below.

Short Course Proposal

Workshop Proposal Learn More…

Written by California Science Teachers Association

California Science Teachers Association

CSTA represents science educators statewide—in every science discipline at every grade level, Kindergarten through University.

CSTA’s New Administrator Facebook Group Page

Posted: Monday, January 15th, 2018

by Holly Steele

The California Science Teachers Association’s mission is to promote high-quality science education, and one of the best practice’s we use to fulfill that mission is through the use of our Facebook group pages. CSTA hosts several closed and moderated Facebook group pages for specific grade levels, (Elementary, Middle, and High School), pages for district coaches and science education faculty, and the official CSTA Facebook page. These pages serve as an online resource for teachers and coaches to exchange teaching methods, materials, staying update on science events in California and asking questions. CSTA is happy to announce the creation of a 6th group page called, California Administrators Supporting Science. Learn More…

Written by Guest Contributor

From time to time CSTA receives contributions from guest contributors. The opinions and views expressed by these contributors are not necessarily those of CSTA. By publishing these articles CSTA does not make any endorsements or statements of support of the author or their contribution, either explicit or implicit. All links to outside sources are subject to CSTA’s Disclaimer Policy: http://www.classroomscience.org/disclaimer.