This video segment adapted from Shedding Light on Science illustrates how light changes speed, and thus direction, in a process known as refraction. Includes background reading and discussion questions. [2:05]

The goal of this activity is to develop and use a model to describe that matter is made of particles on a scale that is too small to be seen. You will be making observations of changes supported by a particle model of matter.

Use Geographic Information System (GIS) technology to observe climate change with these interactive lessons.

In this activity, students will observe another aspect of a chemical change which is a change in temperature. In this reaction, students will experiment with an endothermic reaction.

Students will observe an exothermic reaction in this activity where they add calcium chloride to a baking soda solution. This increase in temperature is due to the chemical change that has occurred.

Students observe a molecular dance of bursting colors through exploring states of matter and learning that materials can be characterize by how they respond to water.

A lesson in observing a plant or plant community in different seasons for the purposes of recording observable changes.

Use this assessment to see what your students have learned about adaptations. This type of assessment allows students to observe and make open-ended claims backed up by evidence. Included are a power point presentation, student quiz, and...

Observe reactions that produce gases in this lab activity! Students observe chemical changes as they evaluate the amount of gas produced. This lab activity includes both student and teacher instruction sheets.

In this feature, adapted from Interactive NOVA: Earth, students explore the relationship between oxygen concentration and the well-being of various organisms by simulating a change in oxygen levels and observing what happens.

Observe the Nisqually Glacier at Mount Rainier in this video segment from NatureScene. [4:07]

This detailed essay defines planets and compares the characteristics to those of Pluto. Orbital graphs and background information clarify the change in Pluto's categorization. A copy of IAU's Resolution 5 is also contained in this essay.

Students will observe the non-mixing of colored solutions by using M&M's in this lab activity. Lab activity includes both student and teacher instruction sheets.

In this activity, kids record their observations of an outdoor environment in a science journal. The spot they record could be close to home or seen out a window.

In this task, 8th graders draw the graphs of two functions from verbal descriptions. Both functions describe the same situation but changing the viewpoint of the observer changes where the function has output value zero. This forces the...

Observe what happens when a solid substance is heated in this animation. Explore heating curves as substances experience a phase change.

This brief site describes the changes that take place within leaves and the environment which result in the colors we observe in Autumn.

Students compare photographs of glaciers to observe how Alaskan glaciers have changed over the last century.

In this simple experiment from the Franklin Institute, students observe the conversion of stored energy into work.

Website from Global Learning and Observations to Benefit the Environment (GLOBE) Program with comprehensive learning and field study resources on the biosphere in which students use materials and data to make observations and learn about...

Through learning activities, students describe the seasonal changes in a local habitat, observe how colors in nature change through the seasons, and research hummingbirds.

Expanding gases are everywhere, from the kitchen to the cosmos. You've tasted their pleasures every time you've eaten a slice of bread, bitten into a cookie, or sipped a glass of soda. In this chemistry science fair project, you'll...

In the following lesson for learners grades 3-5 students observe how changing the temperature affects a small amount of air inside of a bubble. Student sheets are provided in English and in Spanish.

An interactive simulation that teaches about Beer's Law, solutions, concentration, spectrophotometry, and more through observations to explore how much light is absorbed and transmitted with changes in thickness and color. This...