SCIENCE 6 REVIEWER(2ND TRIMESTER)

I. IDENTIFICATION1. It is a group of organisms of the same kind living in same place at the same time.

2. It is considered as the largest ecosystem.

3. The interaction between biotic and abiotic factors.

4. The organism in the food chain that receives the most energy from the sun.

5. It is most productive aquatic biome.

6. It is a gas that is one of the essential components of protein.

7. It is a kind of bacteria that converts most of N2 into NO3 .

8. It is an element present in all living things.

9. It is the kind of earthquake that is the result of crustal movement.

10. It is the strength of the earthquake.

11. It is a kind of rock found near the Mayon volcano.

12. It is the layer of the earth where we live.

13. It is the condition of the atmosphere over a place for a long period of time.

14. It is the rays of the sun that give more heat/radiation.

15. It is the condition of the atmosphere over a place for a short period of time.

ANSWERS:1.Population 8. Carbon2. Earth 9. Tectonic Earthquake3. Ecosystem 10.Intensity4. Producers 11. Igneous Rock5. Estuary 12. Crust6. Nitrogen 13. Climate7. Nitrogen Fixing 14. Direct Rays Bacteria 15. Weather

II. ANALYSIS1. Which organism receives

the least amount of energy?

2. What are the producers in the food web?

3. How many 1st order consumers are there in the food web?

4. How many 2nd order consumers are there in the food web?

5. If the hawk eats the snake who ate the frog, to what order of consumer does the hawk belong?

A. FOOD WEB

B. NITROGEN CYCLE6. What nitrogen compound is needed by plants to produce protein?

7. What kind of gas is released through the process of ammonification?

8. What bacteria converts free nitrogen into nitrate?

9. What process converts free nitrogen into nitrogen compound?

10. What kind of bacteria released nitrogen gas in the air from nitrates?

ANSWERS:A. 1. Hawks 2. Grass and Beans 3. 2 4. 5 5. 4th order B. 1. Nitrate (NO3)

2. Ammonium 3. Nitrogen fixing Bacteria 4. Nitrogen Fixation 5. Denitrifying bacteria

III. ANALOGY1. pack of dogs: _____; Colony of ants: Cooperation

2. ________: hottest biome; tundra: coldest biome

3. Burning fuel : ______; Plants : O2

4. Transpiration : ___; Snow :precipitation

5. NO3 : ______;

NO2 : Nitrite

6. ________: 21 % ; Nitrogen: 78%

7. Wheat: ______; Fungi: decomposer

8. Malnourishment :____; Squatters : Space shortage

9. Ponds:____________; River : running water

10. Hanging Amihan: _____; Hanging Habagat: Southwest monsoon

11. Orchids and Trees: commensalisms;

Eagle and Snake:_____12. . Flowers and bees: ____; Ticks on dogs: parasitism

13. Grazing animals: grassland;

bears and wolves: _____14. cacti: desert ; pines: ___15. sharks and dolphins: salty water; tilapia : ___ 

ANSWERS:1. Competition 8. Food Shortage2. Desert 9. Standing water

3. CO2 10. Northeast Monsoon

4. Vapor 11. Predation5. Nitrate 12. Mutualism6. Oxygen 13. Taiga7. Producer 14. Coniferous forest orTaiga 15. Fresh water

IV. ODD – MAN OUT

1. A. air B. water C. narra D. soil2. A. nitrification B. ammonification C. condensation D. nitrogen fixation

3. A. birth B. death C. migration D. climate change 4. A. active B. dormant C. composite D. Extinct5. A. altitude B. wind systemC. temperature D. latitude

ANSWERS:1. C, abiotic factors2. C, processes in nitrogen cycle

3. D, Population Change4. C, volcanoes according to activity

5. C, factors affecting climate

V. CLASSIFICATIONA. Weathering A – Chemical B - Mechanical1. Oxidation 6. animals2. Carbonation 7. wind3. Hydration 8. force of moving water4. changes in 9. plants temperature 5. dissolution 10. gravity

V. CLASSIFICATIONB. Kinds of RocksA Igneous B Metamorphic C Sedimentary

1. Marble 6. granite2. Limestone 7. sandstone3. Pumice 8. gneiss 4. Slate 9. basalt5. Shale 10. conglomerate

ANSWERS:A. 1. A B. 1. B 2. A 2. C

3. A 3. A 4. B 4. B 5. A 5. C 6. B 6. A 7. B 7. C 8. B 8. B 9. B 9. A 10.B 10. C

VI .EXPERIMENTATION The students in grade 6 conducted an

investigation on the sugar content of their favorite food. In the experiment used 1 bottle of Benedict's solution, assorted small pieces of food such as cookies, crackers, bread, fruit, several glass test tubes, 1 alcohol lamp and tongs. They placed a piece of food in each test tube and then poured 30 - 40 ml of Benedict's solution over the food. They heated the test tubes one at a time over the burner, using the tongs to hold the test tubes. According to their research: Benedict's solution is blue. The presence of sugar will turn the solution to orange

I. Identify the Problem1 point)II. Formulate the Hypothesis(2 points) III. Identify the Variables(3 points)MV/IV:CV: RV/DV: IV. Write the Procedures (3point)V. Data (Draw the set-Ups, label the variables

used and write your observations)(3 points)VI. Conclusion(2 points) VII. Application(1 point)