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They will questions the results because the scientist changed more than one variable at a time.

1. A scientist ran an investigation to study the effects of electron arrangement and number of neutrons in an atom on chemical behavior. The scientist varied both factors at the same time. How will other scientists weigh the results?.

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They will questions the results because the scientist changed more than one variable at a time.

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  1. 1. A scientist ran an investigation to study the effects of electron arrangement and number of neutrons in an atom on chemical behavior. The scientist varied both factors at the same time. How will other scientists weigh the results? • They will questions the results because the scientist changed more than one variable at a time. • They will accept the results since both variables have already been studied. • They will repeat the exact same investigation. • They will perform further investigations by adding additional variables to the investigation.

  2. 2. The process by which heat is transferred in a vacuum is called • Temperature. • Convection. • Conduction. • Radiation.

  3. 3. Which statement describes a chemical property of matter? • The density of ice is 0.4 g/mL • The boiling point of ethanol is 78.4 degrees Celsius. • Sodium is a very reactive element that combines easily with nonmetals. • Rust is a flaky material with an orange-red color.

  4. 4. Which type of wave is part of the electromagnetic spectrum? • Mechanical • Sound • Light • water

  5. 5. You can separate soil into different kinds of particles. This means soil is • A compound • A pure substance • A mixture • An element

  6. 6. How do compounds differ from mixtures? • Compounds are pure substances, and mixtures are not. • Compounds can have variable compositions, while mixtures do not. • It takes a chemical reaction to form a mixture, but not to form a compound. • Evaporation can change the composition of a compound, not a mixture.

  7. 7. Choose the best word to complete this analogy:length: ruler :: _________: graduated cylinder • Temperature • Mass • Time • Volume

  8. 8. A material that allows some but not all light to be transmitted is • Translucent • Opaque • Transparent • Solid

  9. 9. Tyson does an experiment to find out what materials are insulators. During his experiment he finds that a paper clip, penny, and piece of wire make a light bulb shine. He also finds that a glass and piece of paper do not make a light bulb shine. Based on this data, Tyson can infer that • All of the objects are insulators. • None of the objects are insulators. • The paper clip, penny, and piece of wire are insulators. • The glass and piece of paper are insulators.

  10. 10. The amplitude of a sound wave determines the • pitch. • Frequency. • Volume. • Range.

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