3361. Practice check: Select the scientifically correct answer: which organ pumps blood around the human body?
✅ A. Heart
a: Heart | b: Lung | c: Kidney | d: Liver Read more
Everyday Science MCQs – Page 169
3362. Practice check: Select the scientifically correct answer: at standard atmospheric pressure, water boils at what temperature?
✅ A. 100°C
a: 100°C | b: 50°C | c: 0°C | d: 150°C Read more
3363. Practice check: Select the scientifically correct answer: what force pulls objects toward Earth?
✅ B. Gravity
a: Magnetism | b: Gravity | c: Friction | d: Buoyancy Read more
3364. Practice check: Select the scientifically correct answer: which planet is known as the Red Planet?
✅ B. Mars
a: Venus | b: Mars | c: Mercury | d: Jupiter Read more
3365. Practice check: Select the scientifically correct answer: which gas do plants absorb during photosynthesis?
✅ B. Carbon dioxide
a: Nitrogen | b: Carbon dioxide | c: Oxygen | d: Hydrogen Read more
3366. Practice check: Select the scientifically correct answer: what is the chemical formula of water?
✅ B. H2O
a: NaCl | b: H2O | c: CO2 | d: O2 Read more
3367. Practice check: Which option answers this correctly: which blood cells mainly transport oxygen?
✅ A. Red blood cells
a: Red blood cells | b: Plasma proteins | c: Platelets | d: White blood cells Read more
3368. Practice check: Which option answers this correctly: what is the main source of energy for Earth’s climate system?
✅ C. The Sun
a: Tides alone | b: Earth's core alone | c: The Sun | d: The Moon Read more
3369. Practice check: Which option answers this correctly: which material is a good electrical conductor?
✅ A. Copper
a: Copper | b: Dry wood | c: Glass | d: Rubber Read more
3370. Practice check: Which option answers this correctly: which process do green plants use to make sugars using light?
✅ D. Photosynthesis
a: Fermentation | b: Digestion | c: Respiration only | d: Photosynthesis Read more
3371. Practice check: Which option answers this correctly: what is the pH of a neutral solution at about 25°C?
✅ C. 7
a: 14 | b: 4 | c: 7 | d: 1 Read more
3372. Practice check: Which option answers this correctly: which type of wave can travel through a vacuum?
✅ A. Electromagnetic wave
a: Electromagnetic wave | b: Water wave | c: Sound wave | d: Seismic S-wave Read more
3373. Practice check: Which option answers this correctly: which energy source is renewable?
✅ A. Solar energy
a: Solar energy | b: Coal | c: Natural gas | d: Petroleum Read more
3374. Practice check: Which option answers this correctly: what is the center of an atom called?
✅ B. Nucleus
a: Isotope cloud | b: Nucleus | c: Electron shell | d: Molecule Read more
3375. Practice check: Which option answers this correctly: what is the change from gas to liquid called?
✅ C. Condensation
a: Melting | b: Sublimation | c: Condensation | d: Evaporation Read more
3376. Practice check: Which option answers this correctly: what is the approximate speed of light in vacuum?
✅ C. 300,000 km/s
a: 3,000,000 km/s | b: 3,000 km/s | c: 300,000 km/s | d: 30,000 km/s Read more
3377. Practice check: Which option answers this correctly: which natural satellite orbits Earth?
✅ D. The Moon
a: Phobos | b: Titan | c: Europa | d: The Moon Read more
3378. Practice check: Which option answers this correctly: what is the nearest star to Earth?
✅ A. The Sun
a: The Sun | b: Sirius | c: Proxima Centauri | d: Polaris Read more
3379. Practice check: Which option answers this correctly: which instrument measures temperature?
✅ D. Thermometer
a: Voltmeter | b: Barometer | c: Seismometer | d: Thermometer Read more
3380. Practice check: Which option answers this correctly: what is the process of liquid changing into gas called?
✅ C. Evaporation
a: Deposition | b: Freezing | c: Evaporation | d: Condensation Read more