Ch. 1 Intro to Chemistry

Multiple Choice

Why is Chemistry considered to be the "central science"?

• Chemistry is the study of only living organisms.
• Chemistry has no relation to physics or biology.
• Chemistry is primarily focused on the study of rocks and minerals.
• Chemistry is the 'central science' because it links physics, biology, and earth sciences.

Multiple Choice

How does the lack of gravity in space affect the weight of an astronaut?

• The weight of an astronaut decreases to nearly zero in space due to the lack of gravity.
• The weight of an astronaut is unaffected by gravity in space.
• Astronauts weigh the same in space as they do on Earth.
• The weight of an astronaut increases in space due to lack of gravity.

Multiple Choice

How does the lack of gravity in space affect the mass of an astronaut?

• The mass of an astronaut becomes zero in space.
• The mass of an astronaut fluctuates in space.
• The mass of an astronaut remains unchanged in space.
• The mass of an astronaut increases in space.

Multiple Choice

What chance discovery did Andrew Fleming make that changed medicine?

• The discovery of penicillin.
• The creation of antibiotics.
• The invention of the microscope.
• The development of vaccines.

Multiple Choice

Define qualitative observation.

• Qualitative observation focuses solely on statistical analysis.
• Qualitative observation is the process of conducting experiments with quantifiable results.
• Qualitative observation is the collection of non-numerical data that describes characteristics and qualities.
• Qualitative observation is the measurement of numerical data.

Multiple Choice

Define quantitative observation.

• Qualitative observation involves subjective analysis.
• Quantitative observation is only about visual assessments.
• Quantitative observation cannot include any numerical data.
• Quantitative observation is the process of collecting data that can be quantified, typically involving measurements or counts.

Multiple Choice

What is an independent variable?

• An independent variable is the variable that is changed or controlled in a scientific experiment.
• The variable that is measured in response to changes.
• A variable that has no effect on the outcome of the experiment.
• A variable that remains constant throughout the experiment.

Multiple Choice

What is a dependent variable?

• A dependent variable is the hypothesis that predicts the outcome of the study.
• A dependent variable is the initial condition that remains constant throughout the experiment.
• A dependent variable is the variable that is manipulated by the researcher.
• A dependent variable is the outcome variable that researchers measure to see if it is affected by changes in the independent variable.

Multiple Choice

How do scientific theory and scientific law differ?

• Scientific theory is a proven fact; scientific law is a hypothesis.
• Scientific theory explains phenomena; scientific law describes consistent observations.

• Scientific theory and scientific law are the same thing.
• Scientific theory describes consistent observations; scientific law explains phenomena.