Question

UNDERSTAND, RECALL, APPLY & EVALUATE THE CONCEPTS YOU HAVE LEARNT IN SCIENCE TO ANSWER THE FOLLOWING QUESTIONS: Q3. Yusuf & Ahmed were investigating ‘rusting’. They set up 3 test tubes for their investigation as follows: Test tube 1 had water & uncoated iron nails. Test tube 2 had water & greased iron pins. Test tube 3 had water & galvanized iron screws. 3a) PREDICT in which test tube they will find ‘rusting’ taking place. *

EXPLAIN the results/observations in EACH test tube.

Answer 1

test tube 1

Step-by-step explanation:

uncoated iron in water will rust.

in test tube 2. rusting will not take place because greese prevents oxygen and moisture from acting on the iron pins to cause rusting therefore no rusting.

in test tube 3 rusting will not take place because the coating prevents oxygen and moisture from acting on the iron pins to cause rusting there for no rusting