The properties of liquids can be discovered by doing tests on them. To compare the properties of liquids, the liquids need to be tested in the same way. NGSS 2-PS1-1: Plan and conduct an investigation ...

Students will develop an understanding that objects and materials can be tested to learn about their properties. Students will help plan and conduct different tests on the materials. Students will be ...

Our expert reviewers tested each appliance in this guide for at least two weeks and put them through a series of performance tests using an industry-grade Perfect Prime air particle monitor.

Before the age of science, it was clear to most observers that air was a "vital spirit," but beyond that, little was known about the physical properties of air. Aristotle suggested that air was ...