SECTION A - MCQ
3. A micrometer would allow us to measure length to the greatest accuracy.
CORRECT ANSWER ; B (MICROMETER)
18. To seperate a mixture of salt and sand the first step is to stir it in some water and follow out the process of filtration , then crystallization.
CORRECT ANSWER ; D (FILTRATION , THEN CRYSTALLIZATION)
19. The independent variable is what is gonna change during the 5 set ups. The dependent variable is the results and how it was affected.
CORRECT ANSWER ; B (INTENSITY OF LIGHT - INDEPENDENT , VOLUME OF OXYGEN - DEPENDENT)
SECTION B - SHORT ANSWER QUESTIONS
1d. To obtain a weak flame , turn down the gas tap.
8a. First step is use a magnet to separate iron fillings from the mixture.
SECTION C - FREE RESPONSE QUESTIONS
1d. 1 tablet (indigestion tablets) is dissolved in water , it was then tested with some indicators.
RESULTS
(i) Blue Litmus Paper ; remains blue
(ii) Red Litmus Paper ; changes to red
(iii) Methyl orange ; change from orange to yellow
3. A micrometer would allow us to measure length to the greatest accuracy.
CORRECT ANSWER ; B (MICROMETER)
18. To seperate a mixture of salt and sand the first step is to stir it in some water and follow out the process of filtration , then crystallization.
CORRECT ANSWER ; D (FILTRATION , THEN CRYSTALLIZATION)
19. The independent variable is what is gonna change during the 5 set ups. The dependent variable is the results and how it was affected.
CORRECT ANSWER ; B (INTENSITY OF LIGHT - INDEPENDENT , VOLUME OF OXYGEN - DEPENDENT)
SECTION B - SHORT ANSWER QUESTIONS
1d. To obtain a weak flame , turn down the gas tap.
8a. First step is use a magnet to separate iron fillings from the mixture.
SECTION C - FREE RESPONSE QUESTIONS
1d. 1 tablet (indigestion tablets) is dissolved in water , it was then tested with some indicators.
RESULTS
(i) Blue Litmus Paper ; remains blue
(ii) Red Litmus Paper ; changes to red
(iii) Methyl orange ; change from orange to yellow