Problem 1
The test tubes were left at room temperature for a week to see if algae would grow. Which variable is being investigated? A. the volume of water used B. the temperature of the test tube's contents C. the amount of chlorine present D. the amount of algae present
Problem 2
Which of the following is the study of Earth and space? A. life science B. Earth science C. physical science D. chemical science
Problem 2
Use what you know about the vocabulary words to explain the differences between the words in the following sets. Then explain how the words are related. $$ \text { dependent variable-independent variable } $$
Problem 3
Which of these is a factor to which experimental results can be compared? A. independent variable B. dependent variable C. control D. constant
Problem 4
What is the use of scientific discoveries for practical purposes? A. bias B. scientific methods C. science D. technology
Problem 5
Which of the following is an explanation or model that is supported by many experiments and observations? A. hypothesis C. theory B. law D. estimate
Problem 5
Use what you know about the vocabulary words to explain the differences between the words in the following sets. Then explain how the words are related. $$ \text { hypothesis-scientific theory } $$
Problem 6
Which is a rule that describes the behavior of something in nature? A. hypothesis C. estimate B. law D. theory
Problem 7
Use what you know about the vocabulary words to explain the differences between the words in the following sets. Then explain how the words are related. $$ \text { independent variable-constant } $$
Problem 9
Use what you know about the vocabulary words to explain the differences between the words in the following sets. Then explain how the words are related. $$ \text { Earth science-technology } $$
