Teacher Demo: Greenhouse Effect

Introduction

This demo demonstrates the greenhouse effect by comparing the air temperature of a room with the air temperature inside a clear plastic bag containing black construction paper. The bag models the Earth’s atmosphere and the black construction paper models Earth’s dark surface. Continue reading

Characteristics of Soil Activity

 

In this activity, students will observe a variety of soil types and describe the characteristics of these soils.  Soil is made up of air, water, recycling organisms, rock particles, and humus.  Different types of soils are defined by the different proportions of humus and rock particles they contain.  Humus is formed from the decomposition produced by recycling organisms.  The three types of rock particles are sand, silt, and clay.

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Teacher Demos: A. Digestive enzymes, B. Control of Breathing, C. Baroreceptor Reflex

Introduction 

These three demos allow students to experience applications of knowledge of the digestive, respiratory, and circulatory systems by doing very short activities on themselves.   They also allow the opportunity to discuss the pros and cons of using humans as test subjects.  It is very useful for students to get the idea that scientific experiments do not have to be very complicated. Continue reading

Interview with Dr. Ulyana Horodyskyj – Glaciologist

Dr. Horodyskyj is the CEO of Science in the Wild (Boulder, Colorado). This is a citizen science adventure company. Prior to this, she held a post-doc position at the National Snow and Ice Data Center based in Boulder, Colorado. Currently, she is taking people on expeditions around the world and educating them in field science methods, as well as teaching at Colorado College as visiting faculty. Continue reading

Teacher Demo – Water Quality Demonstration

This demonstration shows some differences between potable (drinkable) water and non-potable (non-drinkable) water.  Variations in temperature, turbidity and pH level also determine the types of microorganisms that can thrive in each water sample.  Continue reading