The diagram represents a food chain. How many consumer levels are there?
Five, the microscopic plants are producers and not consumer!
Which test is used to identify carbon dioxide? What is the positive result?
Limewater, it will turn from clear to milky with carbon dioxide
The letters are not the symbols for the elements. Which letter of the element forms an ionic compound with element P?
Element R! It is a non-metal and forms ionic bond with P, a metal.
True or False: Sexual reproduction involves fusion of nuclei and produces genetically identical offspring.
False! Even though fusion of nuclei (fertilisation) is part of the sexual reproduction, the offspring is genetically different.
In the reaction below, _____________ undergoes oxidation. Please choose the reactant that fits in the blank.
Carbon as it gains oxygen during this reaction. Anyone knows why this reaction can happen?
Diagram below shows the structure of the heart. Which labelled part has the correct function stated?
D, the pulmonary artery carries deoxygenated blood from the heart to the lung.
Sodium carbonate is added to vinegar in a beaker and stirred. The reaction causes water in the watch glass to freeze. Would this reaction be an endothermic or exothermic reaction?
Endothermic reaction! Heat is being absorbed, causing the water to lose its heat and freeze.
Substance X is dilute sulphuric acid. Can you identify gas P and gas Q respectively?
Gas P is hydrogen (cathode) and gas Q is oxygen (anode).
Ammonium chloride is added to water containing universal indicator. The universal indicator turns green. What is the pH of the solution?
pH 7, the universal indicator will turn green when substance is neutral!
