Question

1. three arrows hitting a target at a single spot but not the bulls eye center shows

a. accuracy
b. precision
c. neither one
d. both accuracy and precision

1. derived units are used in the answers of what kind of problems?

a. length
b. mass
c. density
d. width

1. what is used to express very large numbers and very small numbers in chemistry?

a. scientific notation
b. a lot of zeros
c. a lot of space
d. big number notation

1. which is the variable that you as the scientist manipulate in an experiment?

a. none of them
b. dependent variable
c. independent variable
d. all of them

1. scientists use what kind of research to solve a specific problem rather than just for the sake of knowledge?

a. pure research
b. applied research
c. serious research
d. pseudoscientific research

1. an explanation of a natural phenomenon based on many observations and investigations over a long period of time is a

a. theory
b. scientific law
c. hypothesis
d. conclusion

1. a visual, verbal, or mathematical explanation of experimental data; often used to represent things that are difficult to visualize is called a

a. model
b. variable
c. conclusion
d. law

1. two common units of measure that are not base units but used frequently by scientists are

a. meter and gram c. gram and celsius
b. fahrenheit and milliliter d. pounds and ounces

Explanation:

1. Precision is about consistent results.
2. Density uses derived units.
3. Scientific notation for large/small numbers.
4. Independent variable is manipulated.
5. Applied research solves specific problems.
6. Theory from many observations.
7. Model explains experimental data.
8. Fahrenheit and milliliter are non - base units.

Answer:

1. b. Precision
2. c. Density
3. a. Scientific notation
4. c. Independent variable
5. b. Applied research
6. a. Theory
7. a. Model
8. b. Fahrenheit and milliliter