Circle the Letter of the Bestanswer

Circle the letter of the bestanswer.

OSophia noticed that many birds pick through the seeds in her bird feeder until they get a sunflowerseed.Whatisaninferenceshecould make from thisobservation?

ABirds are attracted towhiteobjects.BSunflower seeds arecrunchy.

CBirds do not likeseeds.

DBirds prefer sunflowerseeds.

OEllis measured the mass of five samplesof quartz. His results were 39.75 g, 38.91g,

37.66 g, 39.75 g, and 39.55 g. What was the mean mass of thesamples?

A39.55g

B39.75g

C 39.12g

D 38.91g

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0A student grows tomatoes for an experiment. Which piece of equipment will be needed to determine the mass of eachtomato?

AgraduatedcylinderB meterstick

Cstopwatch

Dtriple-beambalance

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OAnother scientist conducts yourexperiment.

This is anexample of what process?

ArepeatedtrialsBreplication

Cscientificinquiry

Ddeductivereasoning

SC.7.N.1.2

8Marie observed people at a store. Which is a qualitative observation she may havemade?

A Twenty people walked into thestore.

1B The storesellsclothes.C Itwas 1:00P.M.

D all of theabove

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Use the graph below to answer Question6.

0What is the general trend in thedata?

AlinearBnotrend

C nonlinearD linear at firstand

thennonlinear

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ReviewandAssessment

Science andthe

NaturalWorld

1.When you explain or interpret an observation, you are

iMeasurement

A CommonLanguage

7.Theamountofmatteranobjectcontainsisits

a.length.b.mass.

a.makingmodels.

c.inferring.

b.classifying.

d.predicting.

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c.weight.d.volume.

8.ThebasicSIunitoflengthisthe

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2.Avariablethatischangedtotestahypothesis

isan ·-- ---·- __

___

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9.Write About It You are a sports reporter

3.Predict How do scientists useobservations

·------

interviewing an Olympic swimmer who lostthe

Writeaonepageinterviewinwhichyou

tomakepredictions?

----·------

silver medal by a few hundredths of a sec

ond.

discussthemeaningoftimeandtheadvanced instrumentsusedtomeasuretime.

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mmThinking Like a Scientist

4.The scientific attitude of having doubtis called

a.open-mindedness. b.curiosity.

c.honesty.d.skepticism.

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S. When a person allows personal opinions, values,ortastestoinfluenceaconclusion,that

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10.Thesignificantfiguresinameasurement

a.includeonlythefirsttwodigits.

b.include only the estimateddigits.

c.include only the digits that havebeen measuredexactly.

d.includeallofthedigitsthathavebeen

personisusing_

__ --·--reasoning.

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measured exactly,plus one estimateddigit.

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6. Compare and Contrast Describe the three types of bias that can influence a science experiment.

---·-----..------

11.------referstohowcloseameasurement istothetrue

or acceptedvalue.

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12.ApplyConceptsWhatisthemedianof7,31,

------·--- .,.

------

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86, 6, 20, 85, and12?

--·--· ·------

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