chap 1

Answer Section

 

MODIFIED TRUE/FALSE

 

                                          1.   ANS:  T                                                    

REF:   section 1.1

 

            2.   ANS:  F, Experimental

 

MULTIPLE CHOICE

 

            3.   ANS:  B                   

            4.   ANS:  C                   

 

            5.   ANS:  D

 

 

PTS:   1                    

 

            6.   ANS:  A                   

 

            7.   ANS:  D                   

 

            8.   ANS:  D                   

 

            9.   ANS:  A                   

 

           10.   ANS:  C                   

           11.   ANS:  C                   

 

           12.   ANS:  D                   

 

           13.   ANS:  C                   

 

           14.   ANS:  D                   

 

           15.   ANS:  A                   

COMPLETION

 

           16.   ANS:  life

 

 

           17.   ANS:  variable

 

 

           18.   ANS:  theory

 

 

           19.   ANS:  graph

 

 

           20.   ANS:  scientific method

 

 

SHORT ANSWER

 

           21.   ANS: 

Parts per thousand (ppt) refers to levels of dissolved substances in water. If the ocean measures 30 ppt of salt that means there are 30 grams of dissolved salt in every 1,000 grams (or liter) of water.

 

 

           22.   ANS: 

temperature

 

 

           23.   ANS: 

22ºC, because the most plants sprouted at that temperature.

 

 

           24.   ANS: 

1. Make observations or research something.

2. Ask a question or state a problem.

3. State a hypothesis.

4. Test the hypothesis with an experiment.

5. Draw conclusions based on the test.

 

PROBLEM

 

           25.   ANS: 

 

 

ESSAY

 

           26.   ANS: 

All measurements must include units in order for the measurement to be understood. All measurements are made by comparing one quantity with another. If a measurement is given only as a number, it is impossible to tell which quantity is being used for comparison.