"weather"

Use this sensor for weather studies, monitoring greenhouses, or for determining days when static electrical discharges could be a problem.

Disposable hand warmers - ideal for outdoor workers and those who engage in cold weather sporting activities.

Measure relative humidity with weather bureau-type wet and dry bulb thermometers. Pocket-sized psychrometer is perfect for student use, as it presents no mercury hazards.

The Understanding Science series is designed to aid the instructor in explaining difficult scientific concepts in an easy to understand format.

We make your OpenSciEd adoption easy with these comprehensive kits designed by teachers and certified by OpenSciEd for guaranteed quality.

Hand and easy-to-read field guides that span all natural science subjects.

How can humans work with the environment?

What are the forces that shape our world?

Answer the questions asked by younger students.

We make your OpenSciEd adoption easy with these comprehensive kits designed by teachers and certified by OpenSciEd for guaranteed quality.

A great addition to your outdoor weather station, these airport quality windsocks are bright orange with reinforced eyelets. Brackets are attached to the windsock by quick lock nylon binding strips so they are easy to replace. Size of windsock: 4" x 15". Size of bracket: 4".

We make your OpenSciEd adoption easy with these comprehensive kits designed by teachers and certified by OpenSciEd for guaranteed quality.

Bring the Earth sciences to life and satisfy National Science Standards (NSS) with one of these versatile density flow models. Teacher developed, these educational demonstration models are the most complete and useful tools for simulating the realistic flow of fluids in nature (i.e., weather systems, ocean circulation, mountain building, and plate tectonics).

What causes rocks to change over time? This hands-on kit lets students use igneous, sedimentary and metamorphic specimens to examine processes such as weathering, lithification, metamorphism and magmatic assimilation.

Kit includes:
• Samples and study charts for 30 student groups
• Large specimens for easy examination
• Chart with mounted specimens
• Detailed study guide with physical properties and descriptions of more than 50 rocks, minerals, and ores.

The set Includes cultures of wild, white, brown, dumpy, vestigial, vestigial brown and sepia.

We fully guarantee the purity and viability of our Drosophila melanogaster cultures. A large, vigorous culture is shipped in a shatterproof plastic vial. To ship Drosophila cultures with living larvae we require 10 days' notice prior to use date. During very cold weather, adult flies may die but eggs and larvae usually survive. Allow cultures to come to room temperature before checking under low magnification for eggs and live larvae. Complete instructions are always included.

Four to six adults of each sex (including virgin females) have been carefully selected for the parent generation. Larvae will be visible within a week of receipt. Please order 7-10 days in advance.

We fully guarantee the purity and viability of our Drosophila melanogaster cultures. A large, vigorous culture is shipped in a shatterproof plastic vial. To ship Drosophila cultures with living larvae we require 10 days' notice prior to use date. During very cold weather, adult flies may die but eggs and larvae usually survive. Allow cultures to come to room temperature before checking under low magnification for eggs and live larvae. Complete instructions are always included.