Agood hypothesis is in the following format. question 3 options: 1 i think that 2because 3 if then 4what if question mass is a fundamental unit because it must be question 4 options: larger than volume calculated measured estimated question 5 (mandatory) (3 points) what are liters, milliliters, and cubic centimeters used to measure? question 5 options: time volume mass distance question 6 (mandatory) (3 points) when is a hypothesis developed in the scientific method? question 6 options: if the experiment justifies one before there is a question after an experiment after a question has been identified and observations are made question 7 (mandatory) (3 points) which term is described when measuring the number of liters of gas trapped in a bottle? question 7 options: horsepower mass volume pressure question 8 (mandatory) (3 points) refer to the following graph to answer the question below. matter and energy what is the independent variable shown on this graph? question 8 options: only temperature (degrees c) is the independent variable. both flow time (s) and temperature (degrees c) are independent variables. only flow time (s) is the independent variable. the slope of the trend line is the independent variable. question 9 (mandatory) (3 points) why do scientists build models? question 9 options: to make generalizations about natural phenomena the observed behavior may represent the universe as a whole the universe is big and complex so it may be to create a smaller physical system to study all of the above question 10 (mandatory) (3 points) which of the following represents a phase change? question 10 options: an explosion boiling water mixed paint a suspension question 11 (mandatory) (3 points) scientists and engineers both contribute to society. what is the role of engineers in society? question 11 options: to develop knowledge that allows us to understand the world and universe to use knowledge to design solutions related to problems question 12 (mandatory) (3 points) which of the following is the best trend line for a set of data points? question 12 options: a trend line that follows the overall pattern of the data points a trend line that connects all of the data points dot-to-dot a straight trend line a curved trend line question 13 (mandatory) (3 points) graphs you see question 13 options: the relationship between different dependent variables the relationship between different independent variables the relationship between the independent variable and the dependent variable question 14 (mandatory) (3 points) energy can be described in many ways. from the list below, what is the best definition of energy? question 14 options: the ability to do work the ability to create a new substance melting, freezing, or evaporating a change in speed question 15 (mandatory) (3 points) what is the name of the variable that you change in an experiment? question 15 options: dependent variable independent variable stable variable graphing variable question 16 (mandatory) (3 points) two toy cars rolled down a hill with the same steepness. both cars rolled 10 m. car a rolled down a wooden hill. car b rolled down a carpeted hill. which car had the slowest speed? how do you know? surface average time (s) car a wooden 3.2 car b carpeted 5.6 question 16 options: car b was slower because the time was longer. they had the same speed because they rolled the same distance. car a was slower because it rolled farther on wood than carpet. car a was slower because the time was shorter. question 17 (mandatory) (3 points) what is a gram used to measure? question 17 options: time volume mass distance question 18 (mandatory) (3 points) what is the celsius temperature scale based on? question 18 options: the boiling and freezing points of water the human body air temperature vapor question 19 (mandatory) (3 points) when you use the scientific method to solve a problem, which procedure do you follow? question 19 options: identify something you think is true and then set out to prove it. do an experiment and then ask questions about it. identify a question, make observations, create a hypothesis, and then set up an experiment to test the hypothesis. find something scientists say is true and then ask questions about it. question 20 (mandatory) (3 points) what is bounce height considered if a ball is dropped and it is noted how high it bounces? question 20 options: constant independent variable control dependent variable