Easy Round Choose the letter of the best answer. 1. In order to test a hypothesis, you must a.

write a laboratory report b. conduct an experiment testing one variable at the same time c. conduct an experiment testing many variables at the same time d. report the results 2. Graphs can show a. patterns c. relationship between variables b. trends d. all the above 3. Mass is measured in a. kilometers c. kilograms b. newtons d. meters 4. Which are the raw materials of photosynthesis? a. water and oxygen c. glucose and carbon dioxide b. oxygen and glucose d. water and carbon dioxide 5. What is the main function of xylem and phloem? a. storage c. transport b. absorption d. photosynthesis 6. A type of muscle found in the walls of digestive tract a. smooth c. cardiac b. absorption d. all of the above 7. Which of the following compounds is not an organic compound? a.CO2 c. C4H10 b. C2H6 d. C3H8 8. An earth's part which is compounds of molten iron and nickel a. crust c. outer core b. mantle d. inner core 9. It is the main source of energy for an ecosystem a. petroleum c. power b. oil d. work 10. The tendency of an object to keep moving or remain at rest a. energy c. power b. inertia d. work 11. It is a change in direction. a. acceleration c. velocity b. speed d. displacement

12. The trough of a wave is the a. high point c. distance of peaks b. low point d. half of the height 13. The lowest layer of the earth's atmosphere is a. mesosphere c. thermosphere b. stratosphere d. troposphere 14. Like a magnet, earth has a magnetic field. What is the most likely cause of earth's magnetism? a. high temperature in the core c. iron in the inner and outer core b. oxygen in the earth's crust d. high pressure on the core 15. which of the following is an example of an exothermic reaction? a. condensing water vapor c. melting ice b. cooking a custard d. exploding dynamite Moderate Round Choose the letter of the best answer. 1. Objects weigh less on the moon than on earth because a. the moon's gravity is greater than earth's gravity b. the moon is far from the sun c. object lose mass when they are on the moon d. the moon's gravity is less than earth's gravity 2. Mass a. is the same as weight b. changes when gravity changes c. increases when weight decreases. d. remains the same and is not affected by the magnitude of gravity 3. It tells how fast velocity changes a. motion c. acceleration b. speed d. average speed 4. Friction is greatest when a crate is pulled across a. a newly-cleaned marble floor c. wet concrete floor b. a well-polished wooden floor d. an asphalt road 5. The two factors that affect the potential energy of objects are a. height and volume c. mass and height b. mass and volume d. height and area 6. With which molecule does hemoglobin readily combine? a. glucose c. water vapor b. oxygen d. plasma

7. What led scientist to conclude that earth is made up of four different layers? a. direct evidence b. rock samples from all four layers c. changing behavior of seismic waves as they reach layer of earth's interior d. temperature readings from earth's interior 8. Which of the following statements is true of members of the alkane series? a. They are both organic compounds and hydrocarbons. b. They are all liquids at room temperature. c. They contain the same number of carbon atoms. d. They are made up of helium atoms. 9. If a force of 8N is applied to a 2kg ball, and a force of 6N is applied to a 3kg ball, how will the acceleration of the balls compare? a. Both accelerations will be the same. b. The acceleration of the second ball will be twice that of the first. c. The acceleration of the first ball will be twice that of the second. d. The acceleration of the first ball will be four times that of the second. 10. Which of the following best describes what happens when hydrogen and oxygen combine to form water? a. Molecules are breaking apart to form atoms. b. Atoms are combining to form molecules. c. Atoms are changing into other atoms. d. hydrogen and oxygen are undergoing a change of state. 11. According to Geologic timeline, where did the first living things originate? a. atmosphere c. Precambrian b. ocean d. Paleozoic 12. What would be the immediate result if all the primary consumers were removed from the ecosystem? a. Plants would stop producing food. b. Decomposers would increase their activity. c. Secondary consumers would have nothing to eat. d. Tertiary consumers would have more to eat. 13. How would damage to the liver affect digestion? a. Foods would not be ground up. b. Proteins would not be broken down. c. Starches would be change to sugars. d. Fats would not be digested properly. 14. What is one reason that scientists support the theory of evolution? a. Humans are the most highly developed organisms on earth. b. Different types of organisms have homologous structures. c. All organisms developed 3.5 billion years ago. d. All organisms function in the same way.

15. How do phagocytes destroy disease-causing organisms? a. by producing antibodies b. by preventing them from entering the body c. by engulfing them d. by splitting them Difficult Round There are different types of questions in this round. You may identify, enumerate or complete the statement. Wrong spelling is incorrect. For problem solving, include correct units. 1. A pingpong ball and a basketball are on top of a shelf. Which has more potential energy? 2. A brick resting on top of a building has stored potential energy equal to the work done to carry it up there. What is the potential energy of a 9N brick that is brought up to a 10meter high building? 3. What virus is responsible for rabies? 4. Give the valence electron of Germanium that has 32 protons. 5. A piece of fossilized wood has C-14 activity that is one-sixteenth that of new wood. How old is the artifact? The half-life of C-14 is 5,730 years. 6. The volume of laughing gas is 12.50mL exerting a pressure of 1.9atm. What will be the pressure if volume is halved? 7. What is the molarity of salt (NaCl) solution if 45g of salt was used forming 20L of solution? 8. How much energy is liberated if 2.56kg of mass was completely transformed into energy? 9. Show the electron configuration of Nitrogen. 10. How do you call the two planetary scale weather systems that circle the globe and a portion of continent? 11. Write the balanced chemical reaction of photosynthesis. 12. Identify the only English alphabet letter which is not used as a symbol of chemical element. 13. It is the study of the relationship between heat and work. 14. List all the 6 Kingdom Scheme Classification of organisms. (in any order) 15. The phenomenon when there's gradual death of the body of water because of lack of dissolved oxygen and too much accumulation of nutrients.

Clincher 1. Feces of bats rich in phosphorus 2. Huge clouds which serve as birth places of stars 3. It is recessive sex-linked trait that is, the inability to have normal blood clotting 4. The process by which certain organisms are duplicated 5. Give the molar mass of water