Practice check: Select the scientifically correct answer: what is the nearest star to Earth?

✅ A. Evaporation

a: Evaporation | b: Freezing | c: Deposition | d: Condensation Read more

✅ B. H2O

a: CO2 | b: H2O | c: NaCl | d: O2 Read more

✅ A. Nitrogen

a: Nitrogen | b: Carbon dioxide | c: Oxygen | d: Argon Read more

✅ D. Piezo-electric effect

✅ A. Conversion of water into steam

✅ D. Organisms interacting with each other and their physical environment

a: A mineral deposit | b: Only a single animal | c: A weather instrument | d: Organisms interacting with each other and their physical environment Read more

✅ C. Breakdown of larger plastic items and synthetic fibres

a: Only untreated timber | b: Only volcanic ash | c: Breakdown of larger plastic items and synthetic fibres | d: Only fresh snow Read more

✅ A. Calcium phosphate