ORC Resource Types

Discipline: Science

Professional Commentary: Students examine the effects of heating on various crystals. Questions in the observation category assess pupils' ability to use a variety of senses to observe data in a certain way- a scientific way....

Discipline: Science

Professional Commentary: This event is designed to illustrate how ink can be separated into its component chemicals using paper chromatography. Five unknown samples of ink on pre-labeled chromatography strips are provided to students....

Discipline: Science

Professional Commentary: Students determine the relationship between temperature and reaction rate of a mixture, then graph their results. They apply their understanding to an everyday situation where temperature is related to reaction rate....

Discipline: Science

Professional Commentary: Students will determine the presence of starch and sugar in unknown solutions. This task assesses students' abilities to observe, record and interpret data, classify, generalize/infer, construct data tables, and identify sugar and starch solutions....

Discipline: Science

Professional Commentary: Students design and conduct an experiment to determine which of three solutions contain starch or sugar. The task assesses students' ability to make simple observations, design simple experiments, utilize indicators, and make generalized inferences from their observations....

Discipline: Science

Professional Commentary: Students compare the times it takes the milk in each of two cups to curdle. Students are told that an enzyme that is added to the milk, rennin, is involved in the natural curdling process of milk....

Discipline: Science

Professional Commentary: Students make simple observations and identify relevant variables, such as frequency and diameter. They then discuss the relationships between variables....

Discipline: Science

Professional Commentary: Students will predict the effect of changing a component of a simple system such as a food web. Students will design and carry out an investigation to test how fertilizers or other factors affect the growth of algae or other organisms in aquarium or pond water....

Discipline: Science

Professional Commentary: Students study a table containing population data covering a 28 year period for snowshoe hare and lynx in a certain area of Canada. The students are asked to create a graph of the data to facilitate accurate analysis, then to use the research data to write a brief response to a proposal to reduce the lynx population....

Discipline: Science

Professional Commentary: Students investigate the growth of yeast in a sugar solution. They verify the presence of carbon dioxide using bromothymol blue....