Which bond is metallic? A. Electron sharing B. Electron transfer C. Electron sea D. Hydrogen bonding Explanation: Metallic bonding involves delocalized electrons.
Which wave travels in vacuum? A. Sound B. Water C. Light D. Seismic Explanation: Light does not require medium.
Which device measures resistance? A. Ammeter B. Voltmeter C. Ohmmeter D. Thermometer Explanation: Ohmmeter measures resistance.
Which unit measures work? A. Watt B. Joule C. Newton D. Pascal Explanation: Work is measured in joules.
Which force acts on charged particles? A. Gravitational B. Magnetic C. Electric D. Nuclear Explanation: Electric force acts on charges.
Which layer contains clouds? A. Troposphere B. Stratosphere C. Mesosphere D. Thermosphere Explanation: Weather and clouds occur in troposphere.
Which ocean current is cold? A. Gulf Stream B. Kuroshio C. Canary D. Brazil Explanation: Canary current is cold.
Which plate boundary creates rift valleys? A. Convergent B. Divergent C. Transform D. Subduction Explanation: Divergence forms rifts.
Which rock forms from sediments? A. Igneous B. Metamorphic C. Sedimentary D. Volcanic Explanation: Sedimentary rocks form from deposition.