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Growing Frogs (Pack of 30) NGSS

SKU #GB-25
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When placed in water these amphibians expand about 600%!

Description

This bright green critter starts out 4 cm (1.5") long but swells up to more than twice its size when placed in water for 8-10 hours. When removed from water, your slippery amphibian will slowly shrink back to its original size as it dehydrates.

A wonderful tool for investigating concepts like mass, volume, surface area, absorption of different concentrates, and more. Perfect for even the youngest scientists. Tap water with a high mineral content may inhibit your frog's absorption and growth. Use distilled water for best results.

TIP: To further explore how variables can alter the results of an experiment, submerge your frog in something other than water - carbonated soda, a solution made with vinegar or dissolved sugar, or other liquids.

Our nontoxic, environmentally safe polymer can be thrown in the trash or crumbled up and added to soil to retain moisture for growing plants. Keep out of direct sunlight, as UV radiation will degrade the polymer. As in nature, not all of our frogs are perfect - a few may have subtle abnormalities. Enjoy the diversity of nature.

Read more on our Blog - How to Throw a Science-Themed Party!

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Reviews

1 review
Great product
Review star icon Review star icon Review star icon Review star icon Review star icon Nov 27, 2016
I simply love those frogs. Once in water they will double the size. You do need to wait for about a day but all the kids are willing to do it and see what happen. They are a bit fragile and in the pack you may get 1 or two with broken legs. However, I think those frogs a great deal.
Novella

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NGSS

This product will support your students' understanding of the Next Generation Science Standards (NGSS)*, as shown in the table below.

Elementary Middle School High School

2-PS1-2

Students analyze data obtained from testing different materials to determine which materials have the properties that are best suited for an intended purpose.

MS-PS1-2

Students can analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.

MS/ETS1.B

A solution needs to be tested, and then modified on the basis of the test results in order to improve it.

HS-PS2-6

Students will observe and communicate scientific information about why the molecular-level structure is important in the functioning of a material.

Suggested Science Idea(s)

2-PS1-2

Students can conduct simple tests using the Growing Frogs to better understand the rate at which the polymers absorb or evaporate water. Information gathered can be used as evidence to support or refute student ideas about hydrophilic (water-loving) materials.

MS-PS1-2

Students can analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.

HS-PS2-6

Students will observe and communicate scientific information about why the substance is able to absorb so much water. Further study of the structure of the hydrophilic polymers will help students to understand that the molecular-level structure is important in the functioning of a material.

 

* NGSS is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of, and do not endorse, this product.

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