Science week inter-house quiz Questions
CHEMISTRY
1. What does the kinetic theory state?
ANS: States that matter is made up of particles that are constantly in motion.
2. Explain how the arrangement of particles in a solid differs from that of a liquid.
ANS: particles in a solid are closely/tightly packed with no spaces between them; however
particles in a liquid are arranged in clusters with small spaces between them.
3. The change in state from a liquid to a gas is known as _____.
ANS: Evaporation
4. Name the element whose mass number is 32, and whose atomic number is 16.
ANS: Sulphur
5. Name the compound whose chemical formula is (NH4)3PO4 .
ANS: Ammonium Phosphate
6. What is the chemical formula for the compound Lead (II) Chloride?
ANS: PbCl2
7. Name the salt formed when aqueous sulphuric acid reacts with Magnesium in its solid state.
ANS: Magnesium Sulphate
8. Determine the number of particles present in 1 mole of lithium oxide.
ANS: 6.02 x 1023 particles
9. Give the chemical symbol of the following elements: Sodium, potassium and Mercury.
ANS: Sodium: Na,
Potassium: K,
Mercury: Hg
10. What is the mass of one mole of Carbon dioxide?
ANS: 44 gmol-1
INTEGRATED SCIENCE
1. What does the particulate theory of matter state?
ANS: Matter is made up of particles.
2. Briefly describe the movement of particles in a gas.
ANS: Particles move rapidly in various directions
3. When heat is applied to a solid, causing it to change to a gas, this process is known as ____.
ANS: Sublimation
4. When a gas is cooled it changes into a solid by the process of ____.
ANS: Resublimation/ Deposition
5. The movement of solutes from an area of low concentration to an area of high concentration is
known as ____.
ANS: Active transport
6. The function of the starch granules in plant cells is to ____.
ANS: Store food for the cell.
7. What is the function of the nucleus of a cell?
ANS: It controls all the activities of the cell.
8. The hormone which causes contractions during labour is known as ____.
ANS: Oxytocin
9. What are the main components of the human circulatory system?
ANS: The heart, blood and blood vessels.
10. The function of platelets in blood is to ____.
ANS: Help in blood clotting
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