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Questions and Answers
Which step of the scientific method involves designing and performing experiments to test the hypothesis?
Which step of the scientific method involves designing and performing experiments to test the hypothesis?
- Experiment (correct)
- Hypothesis
- Question
- Observe
What are the four elements that make up about 96% of the weight of most living organisms?
What are the four elements that make up about 96% of the weight of most living organisms?
- Oxygen, Carbon, Hydrogen, Sodium (correct)
- Oxygen, Carbon, Potassium, Nitrogen
- Oxygen, Carbon, Iron, Nitrogen
- Oxygen, Helium, Hydrogen, Nitrogen
What is the formula for finding the number of neutrons in an atom?
What is the formula for finding the number of neutrons in an atom?
- Atomic Number - Mass Number
- Protons + Neutrons
- Atomic Number + Electrons
- Mass Number - Atomic Number (correct)
What type of bond is a substance consisting of two or more different elements in a fixed ratio?
What type of bond is a substance consisting of two or more different elements in a fixed ratio?
What is the importance of chemical elements to living organisms?
What is the importance of chemical elements to living organisms?
What step of the scientific method involves making an observation?
What step of the scientific method involves making an observation?
What kind of bond involves the transfer of electrons between two atoms?
What kind of bond involves the transfer of electrons between two atoms?
Which type of bond involves the sharing of electrons between two atoms?
Which type of bond involves the sharing of electrons between two atoms?
What is the substance that gets dissolved in a solvent to form a solution?
What is the substance that gets dissolved in a solvent to form a solution?
What is a substance consisting of two or more different elements in a fixed ratio called?
What is a substance consisting of two or more different elements in a fixed ratio called?
Which type of bond involves the partial positive charge on hydrogen and is responsible for high surface tension in water?
Which type of bond involves the partial positive charge on hydrogen and is responsible for high surface tension in water?
What substance minimizes changes in pH and helps maintain a stable pH level in a solution?
What substance minimizes changes in pH and helps maintain a stable pH level in a solution?
What is the range of the pH scale, with 0 being the most acidic and 14 being the most basic?
What is the range of the pH scale, with 0 being the most acidic and 14 being the most basic?
Which four elements make up about 96% of the weight of most living organisms?
Which four elements make up about 96% of the weight of most living organisms?
What term describes substances that cannot be broken down into other substances?
What term describes substances that cannot be broken down into other substances?
What kind of isotopes decay spontaneously, giving off particles and energy?
What kind of isotopes decay spontaneously, giving off particles and energy?
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