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The photoelectric effect, in which light striking certain materials causes them to emit electrons, forms the basic scientific principle behind which everyday technology?
ASolar cells, or photovoltaic panels
BFire extinguishers
CRefrigerators
DVacuum flasks
What is the SI unit used to measure temperature in scientific contexts?
ACelsius
BKelvin
CJoule
DFahrenheit
What is the SI unit used to measure the frequency of a wave, such as sound or radio signals?
AHertz
BAmpere
CNewton
DDecibel
What is the SI unit used to measure pressure, including atmospheric and fluid pressure?
AWatt
BPascal
CJoule
DNewton
Which instrument, commonly found on a vehicle’s dashboard, measures the vehicle’s current speed?
AAltimeter
BSpeedometer
CBarometer
DOdometer
Which instrument, commonly found on a vehicle’s dashboard, measures the total distance a vehicle has traveled?
AThermometer
BTachometer
CSpeedometer
DOdometer
Which scientific instrument is specifically designed to detect and record the ground motion caused by earthquakes?
AAnemometer
BBarometer
CSeismograph
DHygrometer
The Richter scale is primarily used to measure and express what characteristic of an earthquake?
AIts exact geographic location
BThe number of casualties it causes
CIts magnitude, or the amount of energy released
DThe resulting economic damage in monetary terms
What is the primary function of a thermostat found in devices like air conditioners and heaters?
ATo generate electricity
BTo measure humidity levels
CTo automatically regulate and maintain a set temperature
DTo purify the surrounding air
What is the process called by which species gradually change over successive generations, with traits better suited to survival becoming more common over time?
AEvolution through natural selection
BFermentation
CPhotosynthesis
DHomeostasis