Pretest in Science 7

CELESTIAL VILLAGE ACADEMY

Pretest in Science 7 Grade 7 Jupiter Name: _______________________ _____________________________ ______ Teacher: ________________ Date: ______________ ______________ I.

MULTIPLE CHOICE Directions:

Read each item carefully. Circle the letter of the best answer. 1. Which does not belong to the group? a. mold c. yeast b. coccus d. penicillum 2. Which scientist fully utilized the functions of the microscope? a. Joseph J. Lister c. Zacharias Janssen b. Anton van Leeuwenhoek d. Robert Hooke 3. Which statement is not true? a. Transmission electron microscope can magnify specimen up to 100,000x and provides three dimensional view. b. Scanning electron microscope uses the beam of electrons to magnify specimens. c. Transmission electron microscope is effective in studying the details and layers of a specimen. d. Scanning electron microscope can magnify specimen up to 100,000x. 4. Why is Escherichia coli commonly used for the propagation of recombinant DNA? a. E. coli possesses possesses high bacterial plasmid that can accommodate huge DNA. b. E. coli bacteria bacteria have the ability to reproduce in a very short time. c. E. coli is is free from genetic errors d. E. coli contains contains a strain that might help in the propagation propagation of recombinant DNA. 5. Which shows sensitivity to stimulus? a. Eating of food in a slow pace b. Sleeping nine hours a day c. Running from one place to another d. Perspiring due to high temperature 6. The organism that preys upon the bodies of dead animals is ____. a. Commensal b. scavenge r c. parasite d. predator 7. Nitrogen is essential for all living things because ____. a. it is the most abundant gas in the atmosphere b. it can be synthesized into proteins c. it is converted into nitrates d. it can be acted upon by nitrogen-fixing bacteria in the soil 8. ___is not not needed in in the nitrogen nitrogen cycle. cycle. a. Protein b. nitrogen fixer c. bacteria d. root tip 9. The following factors are abiotic, except ___. a. Topography b. moisture c. species d. wind 10.Birds and carabaos, flowers and bees, sharks and remora are all examples of ___. a. transitory association c. endoparasitism endoparasit ism b. continuous association d. ectoparasitism ectoparasit ism 11.The biosphere includes the regions of the Earth, except for the ____. a. tallest tree thriving in the highest mountain b. deepest ocean depth reached by sunlight c. inner core of the atmosphere d. microorganisms living in the atmosphere 12.Rice birds and rats feed on rice plant. The kind of relationship that exists between these organisms is___. a. predation b. symbiosis c. mutualism d. competition 13.As we move upward to the ladder of the energy pyramid, the biomass level ___. a. increases b. decreases c. remains the same d. has no effect

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14.Grasses, shrubs, seedlings, and young trees occupy the ___. a. first tropic level c. third tropic level b. second tropic level d. fourth tropic level 15.Which of the following is not included in the C-O cycle? a. respiration and decay c. burning b. photosynthesis d. flow of energy 16.Which of the following is the SI unit of energy? a. newton c. joule b. watt d. calorie 17.What 17.What happens to the object’s PE when it is raised to a higher place? a. it remains the same c. it decreases b. it becomes zero d. it increases 18.A bouncing ball possesses a. potential energy c. both potential and kinetic energy b. kinetic energy d. gravitational gravitat ional force 19.Which material is a good conductor of heat? a. copper c. wood b. feather d. rubber 20.What form of energy is contained in a dry cell? a. heat c. mechanical mechanical b. chemical d. sound 21.From what source do hydroelectric power plants generate electricity? a. sunlight c. radioactive materials b. falling water d. wastes 22.Which process is heat energy transferred through a vacuum? a. radiation c. conduction b. convection d. evaporation 23.What energy is produced by splitting atoms? a. chemical c. nuclear b. mechanical d. electromagnetic electromagnet ic 24.Which group comprises the nonrenewable sources of energy? a. coal, geothermal, natural gas c. wind, solar, biomass b. nuclear, oil, natural gas d. solar, coal, nuclear 25.The Philippines is the second largest producer of what form of energy? a. biomass c. nuclear b. geothermal d. solar 26.Which of the following color has the longest wavelength? a. yellow b. red c. blue d. green 27.What would be the arrangement of electromagnetic waves if they were arranged according to decreasing energy? a. Gamma, radio, microwave b. X-ray, light, radio c. X-ray, gamma, ultraviolet d. Gamma, ultraviolet, X-ray 28.Light travels slowest in ____. a. alcohol b. air c. glass d. plastic 29.All except one are examples of opaque objects. a. notebook b. monoblock hair c. glass cup d. rubber shoes 30.Objects that emit or send off their own light are luminous objects. Which of the following is not luminous?



32.Wind that occurs during night time is called ____. a. land breeze c. sea breeze b. front d. calm wind 33.Cold air masses ___ warm air masses. a. are lighter than c. are heavier than b. have the same weight as d. are less dense than 34.The ___ is the atmospheric layer that reflects radio waves back to Earth. a. Exosphere c. ionosphere b. Thermosphere d. ozone 35.When warm, moist air moves over cool surface, ___ is formed. a. snow c. hail b. fog d. rain 36.Which value corresponds to the PH of pure water? a. 14 b. 7 c. 3 d. 1 37.What type of substance is NaCl? a. Acid b. base c. salt d. sugar 38.Which does not belong to the group? a. Sodium b. tungsten c. aluminum d. tin 39.Which process can separate sulfur and iron filing when put together? a. Decantation b. Filtration c. Magnetic separation d. Evaporation 40.Which of the following is not a property of a colloid? a. Tyndall effect b. Brownian motion c. Adsorption d. Absorption II.

Identification Directions:

Supply the missing word or group of words to complete the sentences. 1. The nearest point of the moon’s orbit around Earth is called ______________. 2. The darkest part of a shadow casts by an opaque objects is called _______________. _______________. 3. Lunar eclipse can happen during _________________ phase. 4. Solar eclipse can happen during ________________ phase. 5. During annular eclipse, the ring of light that surrounds the umbra is called ____________. ____________. 6. Snow, hail, sleet, and rain are examples of ______________. 7. The ______________ layer in the atmosphere absorbs ultraviolet radiation from sunlight. 8. The particles in the atmosphere where water vapor condenses are called ______________. ______________. 9. The unequal heating of the land and water causes the air movements called ___________ ___________ and _____________. _____________. 10.Predictions made as regards changes in weather are called ___________.

III.

MATCHING TYPE A. Directions:

Match the items in column A with those in column B. Write your answer on the line provided before the number.



_____2. spring balance balance

b. always always opposes movement of objects

_____3. contact force

c. present in objects directly in in contact

_____4. magnetic

d. like poles repel, repel, unlike unlike poles attract attract

_____5. gravitational gravitational

e. instrument instrument used to measure force

B. Motion

B.

_____6. speed

f. 5 kilometers kilometers

_____7. velocity velocity

g. 40 m/s

_____8. acceleration

h. 10 m/s2

_____9. distance

i. 60 kph, kph, east

_____10.displaceme _____10.displacement nt

j. 30 meters, meters, south

Use the key given below in classifying the materials in numbers 1 to 9. Write your answer on the space provided before the number. Write the letters only. a. igneous b. sedimentary

C.

_____1.basalt _____1.basalt

_____6. andesite andesite

_____2. gravel

_____7. Limestone Limestone

_____3. Marble

_____8. Gneiss Gneiss

_____4. Peat Peat

_____9.clay/ _____9.clay/ mud

_____5. Conglomerate Conglomerate

_____10. Pumice Pumice

Arranged the following materials composing the Earth’s interior from the least dense (number 1) to the densest (number 6). _____ _____ _____ _____ _____

IV. 1.

2. 3. 4.

c. metamorphic d. sediment

silicates silicates of metallic metallic compound iron iron and nickel nickel silicon silicon aluminum aluminum iron iron and magnesium magnesium ironiron- rich metal metal alloy

ESSAY

Compare and contrast the following terms: a. Gravity and weight b. Vector and scalar c. Impulse and momentum d. Speed and velocity e. Acceleration and deceleration Do you think it is possible to have a frictionless surface? Prove your answer. Where do you exert greater force, in climbing or in going down the mountain? Why? Do you agree on the continuous importation of crude oil even if it is expensive? Why?



Pretest in Science 7

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