16An ECG machine records the:ABlood sugarBBrain wavesCElectrical activity of the heartDLung capacityView AnswerDiscussWorkspaceReportSaveEasy
17SONAR is used to detect objects:AUnderground using heatBUnder water using soundCIn space using lightDIn the air using radio wavesView AnswerDiscussWorkspaceReportSaveEasy
18A sphygmomanometer measures:ABody temperatureBBlood pressureCBlood sugarDHeart rate onlyView AnswerDiscussWorkspaceReportSaveEasy
19A microscope is used to see:AVery small objectsBDistant starsCSound wavesDMagnetic fieldsView AnswerDiscussWorkspaceReportSaveEasy
20A seismograph records:AEarthquakesBAir pressureCRainfallDHeartbeatsView AnswerDiscussWorkspaceReportSaveEasy