Bioscience Final

A substance made of only one type of atom that cannot be broken down by chemical means

• compound

• element

• electron

• molecule

The smallest basic unit of matter is a(n)

• element

• atom

• molecule

• speck

Substance formed by a chemical reaction

• reaction

• molecule

• product

• proton

Measurement of acidity; related to free hydrogen ion concentration in a solution

• acid power meter

• centimeter

• pH

• hydrometer

Which of the following is something you should NOT do in a lab?

• read the label of chemical bottles before using it

• pour unused chemicals back into their original bottles

• use lots of water to wash skin that has been splashed with chemicals

• take only as much as you need of shared chemicals

An observation made with your senses

• Qualitative observation

• Quantitative observation

• temperature

• conclusion

What is a manipulated variable (independent variable)?

• the variable that changes as a result of the experiment

• the variable that the scientist changes

• the evidence

• the quantitative observation

What is a control?

• a variable that is unchanged to compare results to

• a changed variable

• a hypothesis

• a conclusion

A 5mL sample of water has a mass of 5g. What is the density of water?

• 1 g/mL

• 1 mL/g

• 25 gmL

• 10 gmL

What is chemistry?

• the study of matter

• the study of the universe

• the study of science

• the study of numbers