3541. Which option answers this correctly: what is the center of an atom called?
✅ D. Nucleus
a: Molecule | b: Electron shell | c: Isotope cloud | d: Nucleus Read more
✅ D. Nucleus
a: Molecule | b: Electron shell | c: Isotope cloud | d: Nucleus Read more
✅ D. Barometer
a: Hygrometer | b: Anemometer | c: Thermometer | d: Barometer Read more
✅ B. Solar energy
a: Coal | b: Solar energy | c: Petroleum | d: Natural gas Read more
✅ C. The Moon
a: Titan | b: Europa | c: The Moon | d: Phobos Read more
✅ D. Evaporation
a: Condensation | b: Deposition | c: Freezing | d: Evaporation Read more
✅ B. Condensation
a: Evaporation | b: Condensation | c: Sublimation | d: Melting Read more
✅ C. 300,000 km/s
a: 30,000 km/s | b: 3,000,000 km/s | c: 300,000 km/s | d: 3,000 km/s Read more
✅ D. Nitrogen
a: Oxygen | b: Carbon dioxide | c: Argon | d: Nitrogen Read more
✅ C. The Sun
a: Sirius | b: Polaris | c: The Sun | d: Proxima Centauri Read more
✅ C. Ozone layer
a: Inner core | b: Troposphere only | c: Ozone layer | d: Mantle Read more
✅ B. Heart
a: Lung | b: Heart | c: Liver | d: Kidney Read more
✅ B. Thermometer
a: Voltmeter | b: Thermometer | c: Seismometer | d: Barometer Read more
✅ C. Vitamin D
a: Vitamin C | b: Vitamin B12 | c: Vitamin D | d: Vitamin K Read more
✅ A. Evaporation
a: Evaporation | b: Freezing | c: Deposition | d: Condensation Read more
✅ A. Newton
a: Newton | b: Joule | c: Watt | d: Pascal Read more
✅ A. Barometer
a: Barometer | b: Hygrometer | c: Anemometer | d: Thermometer Read more
✅ C. Nitrogen
a: Carbon dioxide | b: Argon | c: Nitrogen | d: Oxygen Read more
✅ B. 100°C
a: 50°C | b: 100°C | c: 0°C | d: 150°C Read more
✅ D. Ozone layer
a: Inner core | b: Mantle | c: Troposphere only | d: Ozone layer Read more
✅ A. Gravity
a: Gravity | b: Magnetism | c: Buoyancy | d: Friction Read more