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1) Grade 7: A series of organelles that is free of ribosomes is called _________. a) smooth endoplasmic reticulum b) mitochondrian c) plastid d) rough endoplasmic reticulum 2) Grade 7: What is the process when water molecules evaporate or diffuse from the leaves of plant? a) Respiration b) Photosynthesis c) Transpiration d) Evaporation 3) Grade 8: Which among the following is NOT present in animal cells? a) Central Vacuole b) Lysosomes c) Ribosomes d) Nucleus 4) Grade 8: Based on the principle of biomagnification, which among the following will have the most concentration of toxins? a) Primary Consumer b) Secondary Consumer c) Producer d) Quaternary Consumer 5) Grade 9: If n=2 and l=1, what are the possible values of ml? a) 0 b) -2, -1, 0, 1, 2 c) -1, 0, 1 d) -3, -2, -1, 0, 1, 2, 3 6) Grade 9: The Aufbau Principle states that ________________________. a) only two electrons can occupy an orbital b) electrons enter the lowest available energy level c) electrons remain unpaired if possible d) orbitals are regions in space where one is likely to find an electron 7) Grade 10: action: pushing the wall by hand : : reaction : _____________________ a) weight of the wall b) normal force of the hand to the wall c) force by the wall on the hand d) friction of the wall to the hand 8) Grade 10: How does an object’s acceleration change if the net force applied on the object is doubled? a) The acceleration is cut in half. b) The acceleration is also doubled. c) The acceleration does not change. d) The acceleration is multiplied by four.

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