Intro to Chem Review

The study of chemicals that, in general, do not contain carbon is traditionally called what type of chemistry?

• bio
• inorganic
• physical
• analytical

Which of the following would a chemist be most likely to study?

• a leaf floating on water
• a leaf changing color in autumn
• a leaf being blown by the wind
• a leaf being eaten by insects

Which of the following best describes an example of pure chemistry?

• testing the effects of lower concentrations of a drug on humans
• studying chemicals containing carbon
• developing a cure for osteoporosis
• finding an antidote for a new strain of cirus

A theory is a _____.

• proposed explanation for an observation
• well-tested explanation for abroad set of observations
• summary of the results of many observations
• procedure used to test a proposed explanation

Which step in the scientific method requires you to use your senses to obtain information?

• revising a hypothesis
• designing an experiment
• making an observation
• stating a theory

Collaboration and communication are important in science because

• most research problems are not very complex
• most scientists have the knowledge to solve any scientific problem
• they increase the likelihood of a successful outcome
• they keep scientists from having to repeat experiments

The variable that is observed during an experiment is called what type of variable?

• independent
• controlling
• manipulated
• responding

Which of the following is NOT an example of matter?

• air
• heat
• smoke
• water vapor

An example of an extensive property of matter is___.

• temperature
• pressure
• mass
• hardness

All of the following are physical properties of matter EXCEPT ___.

• mass
• color
• melting point
• ability to rust