Praxis 5442 middle - Study guides, Class notes & Summaries

Middle School Science Praxis 5442 Exam Study Guide. Substance - answermatter that has a uniform and definite composition mass - answerA measure of the amount of matter in an object physical property - answerof a substance is density density - answermass/volume physical properties of a substance - answercolor and odor, melting and boiling points, malleability and hardness chemical properties - answerCharacteristic that cannot be observed without altering the substance phases of matter -...

Which of the following characteristics is most important in demonstrating that a hypothesis should be called a theory? A.It interprets an observation. B.It applies to a narrow range of phenomena. C.It summarizes the most recent work of a scientist. D.It provides an explanation for the results of many experiments. It provides an explanation for the results of many experiments. A hypothesis is a tentative explanation for a set of observations. Further experiments are conducted to test the...

Matter Anything that has mass and takes up space. John Dalton Proposed elements were made of atoms; this theory is the Atomic Theory of Matter. Sir Joseph John (J.J.) Thompson Discovered electrons; pictured electrons embedded with protons. Ernest Rutherford Atoms have positive nucleus; electrons orbit in empty space. Sir James Chadwick Existence of neutrons in the nucleus. Physical Property The way something looks, feels, smells, and tastes. Physical Change Any change to the ph...

The process skill of concluding Making a determination based on the results of a controlled experiment A chemistry experiment is performed to determine the effect of a nonvolatile solute on the boiling point of water. Three trials are performed in which 10mg, 20 mg, and 30 mg of salt are added to 500 ml of distilled water. Each solution is heated on a hot plate, and the elevated boiling points are recorded. Which of the following correctly identifies the independent and dependent variables? T...

The process skill of concluding Making a determination based on the results of a controlled experiment A chemistry experiment is performed to determine the effect of a nonvolatile solute on the boiling point of water. Three trials are performed in which 10mg, 20 mg, and 30 mg of salt are added to 500 ml of distilled water. Each solution is heated on a hot plate, and the elevated boiling points are recorded. Which of the following correctly identifies the independent and dependent variables? T...