Chapter 1 - Introduction to Chemistry

Matter is defined as anything that: a) exists in nature c)is found in the universe b) is solid to the touch d)has mass and takes up space

Mass is preferred as a measurement over weight for all of the following reasons EXCEPT: a) it has the same value everywhere on Earth b) it is independent of gravitational forces c) it becomes less in outer space, farther from Earth d) it is a constant measure of the amount of matter

Which of following is an example of pure research? a) creating synthetic elements to study their properties b) producing heat-resistant plastics for use in household ovens c) finding ways to slow down the rusting of iron ships d) searching for fuels other than gasoline to power cars

When working with chemicals in the laboratory, which of the following is something you should NOT do? a) read the label of chemical bottles before using their contents b) Pour any unused chemicals back into their original bottles c) Use lots of water to wash skin that has been splashed with chemicals d) take only as much as you need of shared chemicals

Which of the following is true about CFCs? a) They are made by humans b) They are naturally occurring c) They are toxic d) They are unstable

Which of the following appliances increase CFCs in the environment? a) refrigerators b) microwave ovens c) washing machines d) televisions

A person is traveling by airplane 10 km above the ground level. What is the impact on the person’s mass and weight compared to that at ground level? a) Mass increases, weight decreases b) Mass decreases, weight decreases c) Mass remains the same, weight decreases d) Mass and weight remain the same

Which of the following is qualitative data? a) color b) pressure c) temperature d) volume

Which of the following is quantitative data? a) color b) odor c) shape d) volume

Anything that has mass and takes up space is called - a) weight b) matter c) pressure d) volume

A judgment based upon the results of an experiment is called - a) conclusion b) variable c) theory d) hypothesis

What is the name given to research that is undertaken to solve a specific problem? a) theoretical research b) technology c) pure research d) applied research

The practical use of science information is a) engineering b) pure research c) applied research d) technology

Chemists whose specialty is determining the composition of unidentified substances work in the field of ______chemistry. a) physical b) inorganic c) organic d) analytical

What do you do to test a hypothesis - a) guess b) create a spreadsheet with data c) publish a scientific paper d) design an experiment

A \_\_\_\_ can be used to help visualize submicroscopic structures and events a) hypothesis b) theory c) model D) variable

Name the independent & dependent variable An automobile manufacturer conducts tests to determine how bright brake lights should be in order to minimize the time required for the driver of a following car to realize that the car in front is stopping and to hit his brakes.

A CFC is a chemical made up of ____ a) carbon, fluorine and calcium b) many chlorine atoms and some fluorine c) carbon, fluorine and chlorine d) many carbon atoms and some fluorine

The variable that you plan to change in an experiment is called - a) the constant b) the control c) the dependent variable d) the independent variable

A chemist who studies how digestion occurs in humans works in the field of ___ chemistry. a) physical b) inorganic c) biochemistry d) analytical

State whether qualitative or quantitative weight of an elephant

The first step of the scientific method involves - a) forming a hypothesis b) making observations c) performing an experiment d) drawing a conclusion

Which of the following is most correct? a) You can accept or reject a hypothesis, but you can never prove it to be true b) You can prove a hypothesis to be true c) You can prove a hypothesis to be false d) Accepting or rejecting a hypothesis is the same as proving whether or not the hypothesis is true

Which of these is NOT a step in the scientific method - a) hypothesis b) experiment c) conclusion d) publish a science textbook