21. spring scale 2. a meniscus 3. a triple beam balance Which of the following would you use to measure the mass of a flip flop?1. spring scale2. a meniscus3. a triple beam balance4. graduated cylinder
3The most important lab safety rule is always wear safety goggles.always follow your teacher’s instructions and lab or textbook directions exactly.always wear an lab apron.design and conduct your own experiments without asking your teacher.
4Which of these is incorrect? To measure __________ use _______. Mass, a graduated cylinderLength, a metric rulerTime, secondsVolume, L x H x W or water displacement
5Which of these is incorrect? Mass = gramsWeight = newtonsLength = metersVolume = g/cm3
6Which of these is incorrect? 5 kg = 5000 g2 L = 2000 mL3 m = 30 cm10 decigrams = 1 g
7Which of these is correct? Boiling point is 100 degrees Celsius.Freezing point is 0 degrees Fahrenheit.Boiling point is 273 degrees Kelvin.Freezing point is 0 degrees Kelvin.
8Accurate but not precise Precise but not accurate If the data collected when measuring your dog’s tail was 27 cm, 36 cm, 25 cm, and 39 cm and the actual value was 30 cm, you could conclude that your data was. . .Accurate and preciseAccurate but not precisePrecise but not accurateNeither accurate nor precise.
9anomalous data. a significant figure. an estimate. a percent error. If the data collected for the temperature outside for this week was 82o, 78o, 15o, 75o, and 83o, we would say that the 15o isanomalous data.a significant figure.an estimate.a percent error.
10For which of the following would the millimeter be the most appropriate unit of measure? The length of a belt.The height of a bee.The distance from Chesterland to Mayfield.The density of a pin.
11What does it most likely mean if a graph shows no identifiable trends? There are more than two variables.There is a strong relationship between the variables.The graph has no use or value.There is no relationship between the variables.
12The metric system of measurement is based on the number 1000100110
13 If scientists cannot obtain exact numbers, they should rely on precisionsignificant figuresestimationanomalous data
14To determine how close to the true value an experimental value is, you would use percent errorprecisionsignificant figuresaccuracy
15A line graph in which the data points fall along a straight line is called a linear graph.anomalous graph.nonlinear graph.a faulty graph.
16What is the first thing you should do if an accident occurs in your classroom? Start first aid treatment.Find the emergency equipment.Call 911.Notify your teacher.
17A group of parts that work together is called a: processsystemfeedbackmodel
18The average number in a set of data is . . . MeanMedianModeRange
19The difference between the greatest and least number in a data set is called the . . . Percent errorMedianModeRange
20The number that repeats the most in a set of data is called the . . . MeanMedianModeRange
21The middle number in a set of data when arranged from greatest to least. MeanMedianModeSignificant figure
22To calculate the density of an object, you would Multiply L x W x HDivide volume by mass.Multiply weight x volume.Divide mass by volume.
23Which of these prefixes is correct? Deka = 100Hecto = 10Milli = 1/100Kilo = 1000
24In SI, the kilogram is the basic unit of MassVolumeWeightDensity
25Mass and weight are different on the Moon because mass measures the force of gravity on an object.weight measures the amount of matter an object contains.weight measures the force of gravity on an object.mass measures the space an object takes up.
26The amount of space an object takes up is its densityvolumeweightmass
27The official SI unit of temperature is FahrenheitKelvinCelsiusThe boiling point of water.
28The closeness of a measurement to its true value is its precisionpercent erroraccuracysignificant figure
29A line graph shows what variables were controlled in an experiment how the dependent variable changes in response to the independent variable.the input, process and output of a systemchanges in the independent variable
30A screw has a volume of 3 ml and a mass of 15 grams A screw has a volume of 3 ml and a mass of 15 grams. What is its density?5 g/cm345 g/ml.2 g/cm3.2 g/ml
31Objects that have a density ___ 1.0 g/cm3 will ____. Less than, sinkGreater than, floatEqual to, sinkLess than, float
32The significant figures in a measurement include the digits that have been measured exactly, plus one digit whose value has been estimated.only the digits that have been measured exactly.only the digit whose value has been estimated.only zeroes that are after the decimal point.
33If a shoe box measures 6.2cm high, 7.8 cm wide, & 21 cm long . . . What is its volume?
34If the data set is: 2, 7, 19, 13, 5What is the mean?
35If the data set is: 2, 7, 19, 13, 5, 1What is the median?
36If the data set is 22, 33, 44, 55, 22, 33, 55, 66, 33.What is the mode?
37If the data set is If the data set is: 2, 7, 19, 13, 5, 1 What is the range?
38If the density of water is 1. 0 g/cm3, and you found it to be 1 If the density of water is 1.0 g/cm3, and you found it to be 1.2 g/cm3.What is your percent error?Hint: experimental –actual x 100%actual
39Why are line graphs said to be powerful tools? They show how different sets of data are related.They are easier to make than bar graphs.They can show both numerical and categorical data.They give more information than bar graphs.
40After you have completed a lab investigation you should do all of the following except turn off, unplug, and return any equipment to its proper place.pour all liquid wastes down the sink drain.wash your hands thoroughly.clean up your work area.
41What units would you use to measure the volume of a pop-tart box? Kg/m3g/cm3mlcm3
42Scientists have developed models for the structure of molecules because molecules move to fast.molecules are hazardous.molecules are too small.molecules are too far away.
43For which of the following would the kilometer be the most appropriate unit of measure? The distance from Solon to Chesterland.The length of a car.The length of a nail.The weight of a jet plane.
44If you spill a chemical on your skin, after notifying your teacher, you should cover the spill with a dressing.flush the skin with large amounts of water.go to the emergency room.apply an ice pack.
45feedback process output input In a home central heating system, when the room temperature measured by the thermostat reaches a set value, the thermostat switches off the heater. This action by the thermostat is an example offeedbackprocessoutputinput
46simple models graphs diagrams computer programs Scientists use which of the following to examine models of complex systems?simple modelsgraphsdiagramscomputer programs