Who was the first scientist to observe a cell?

Robert Hooke observed cells in cork under a microscope in 1665. He coined the term 'cell'.

Which instrument measures temperature?

A thermometer is specifically designed to measure temperature.

Which instrument measures atmospheric pressure?

A barometer is used to measure atmospheric pressure.

Which instrument is used to see very small objects?

A microscope magnifies small objects to make them visible.

Which instrument measures humidity?

A hygrometer measures the amount of humidity in the air.

Which instrument is used to measure electric current?

An ammeter measures the flow of electric current in a circuit.

Which instrument is used to measure voltage?

A voltmeter measures the electrical potential difference between two points.

Which instrument measures the strength of an earthquake?

A seismometer detects and records the vibrations caused by earthquakes.

Which instrument is used to see distant objects?

A telescope is designed to observe distant objects in space or on Earth.

Which instrument measures blood pressure?

A sphygmomanometer is used to measure blood pressure.

Which instrument measures the purity of milk?

A lactometer measures the density of milk to determine its purity.

Instrument used to measure wind speed is?

An anemometer measures the speed of wind.

Instrument that detects lies by monitoring body signs is?

A polygraph, or lie detector, monitors physiological responses to detect deception.

Which instrument records heart activity?

An ECG (Electrocardiogram) records the electrical activity of the heart.

Which instrument records brain waves?

An EEG (Electroencephalogram) records electrical activity in the brain.

Instrument used to measure angles in navigation is?

A sextant is used to measure angles for navigation, especially at sea.

Which instrument measures altitude?

An altimeter measures the altitude of an object above a fixed level.

Instrument used for measuring eye pressure is?

A tonometer measures intraocular pressure (eye pressure).

Device used to detect electric charge is?

An electroscope detects the presence and magnitude of electric charge.

Instrument that checks purity of alcohol is?

A hydrometer measures the density of liquids, including alcohol purity.

Which instrument measures optical power of lenses?

A lensmeter measures the optical power of lenses.

Device used to measure light intensity is?

A photometer measures the intensity of light.

Instrument used to view deep inside the body is?

An endoscope is used to view the interior of the body.

Which device is used to observe underwater objects?

A periscope is used to observe objects from a submerged position.

Instrument that measures hearing ability is?

An audiometer measures hearing acuity.

Instrument used to measure electric resistance is?

An ohmmeter measures electrical resistance.

Instrument that projects stars in a dome is?

A planetarium projects images of stars and celestial bodies.

Device used to produce sound waves for imaging is?

Ultrasound uses sound waves to create images of the inside of the body.

Which instrument measures radioactivity?

A Geiger counter detects and measures ionizing radiation.

Which device is used to measure gas pressure?

A manometer measures the pressure of gases or liquids.

Instrument used to split light into spectrum is?

A spectrometer splits light into its component wavelengths (spectrum).

Instrument used in navigation and direction is?

A compass is used for navigation and determining direction.

Instrument used to check eye number is?

A phoropter is used to measure refractive error and determine eyeglass prescription.

Device that stores electric charge is?

A capacitor stores electrical energy in an electric field.

Instrument used to check noise levels is?

A sound meter measures noise levels in decibels.

Instrument used to measure magnetic field is?

A magnetometer measures the strength and direction of magnetic fields.

Device used to see bacteria is?

A microscope is used to view microorganisms like bacteria.

Instrument used to detect metal in body is?

MRI can detect metal objects inside the body, though X-ray is also commonly used.

Device that analyzes blood components is?

A hematology analyzer automates the counting and analysis of blood cells.

Instrument used to detect faults in machines is?

A vibration analyzer detects faults by analyzing vibration patterns in machinery.

Which device measures body temperature?

A thermometer is used to measure body temperature.

Instrument used for eye examination is?

A phoropter is used during eye examinations to determine the correct lens prescription.

Instrument used to count blood cells is?

A hemocytometer is used to count blood cells under a microscope.