LSM Grade 4 Science 2nd Trim Exam SY 2010 -2011

SCIENCE 4 Lourdes School of Mandaluyong 2nd Trimester Exam Reviewer Label the parts of the flower, bean seed, and corn seed by writing your answers in blanks.

1. __________________________________ 2. __________________________________ 3. __________________________________ 4. __________________________________ 5. __________________________________ 6. __________________________________ 7. __________________________________ 8. __________________________________ 9. __________________________________ 10. __________________________________ 11. __________________________________ 12. __________________________________ 13. __________________________________

1. __________________________________

1. __________________________________

2. __________________________________

2. __________________________________

3. __________________________________

3. __________________________________ 4. __________________________________

Science 4 LSM 2010-2011

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Encircle the letter of the correct answer. 1.

They are the brightly-colored structures of a flower. They make up the part of the flower called corolla and they attract bees and butterflies. a. petal c. anther b. pistil d. stamen

2. These parts make up the calyx of a flower. They cover and protect the budding flower and tend to separate and fall when the bud opens. a. petals c. sepals b. egg cells d. pollen grains 3.

The female reproductive organ of the flower. a. ovary c. egg cell b. stamen d. pistil

4.

It contains the egg cell of the flower. a. stigma b. style

c. ovary d. ovule

5. The sticky hair-like structure that catches and holds the pollen grains. a. stigma c. sepal b. style d. stamen 6. The part of the flower that connects the stigma and the ovary. a. pistil c. stigma b. ovary d. style 7. The male reproductive organ of a flower. a. stamen b. style

c. pistil d. filament

8. The enlarger part of the flower that contains the pollen grains. a. filament c. stigma b. style d. anther 9. The dust like particles that produce the sperm cells of the flower. a. egg cell c. pollen grains b. endosperm d. pollination 10. It occurs when the pollen grain of one flower reaches the stigma of another flower. a. self-pollination c. pollination b. cross- pollination d. fertilization 11. This is the food storage tissue around the plant embryo inside the flower. a. egg cell c. polar nuclei b. zygote d. endosperm 12. It occurs when the pollen grain of from the anther of one flower is transferred to the stigma of another flower of the same kind. a. cross pollination c. pollination b. germination d. fertilization 13. It is the enlarged ovary of the plant. a. egg cell b. embryo Science 4 LSM 2010-2011

c. ovule d. fruit 2

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14. This is the part of the seed that contains the embryo. a. endosperm c. cotyledon b. epicotyls d. seed coat 15. This is the other end of the seed embryo that will become the roots of the plant. a. seed coat c. hypocotyls b. epicotyls d. radicle 16. The process the seed undertakes from the time it starts to sprout until it grows into a seedling. a. seed dispersal c. pollination b. germination d. fertilization 17. The process by which seeds are sent by their parent plants into a faraway place to become a new plant. a. fertilization c. germination b. pollination d. seed dispersal 18. It is the smallest particle of a substance which has the properties of that substance. a. matter c. atom b. molecule d. mass 19. It is the amount of space that an object occupies. a. shape c. volume b. density d. weight 20. This is the method used in finding the volume of irregular solids. a. water displacement c. using a weighing scale b. using a ruler or a meter stick d. counting the atoms 21. It is the amount of matter present in a given volume of substance. a. weight c. length b. mass d. density 22. The uniform distribution of gas in all available space possible. a. distribution c. solution b. dissolution d. sublimation 23. This happens when liquid is changed to vapor or gas. a. condensation c. evaporation b. melting d. distribution 24. This occurs when solid is changed to gas without passing through the liquid stage. a. distribution c. solution b. dissolution d. sublimation 25. This happens when gas or vapor is changed into liquid form. a. condensation c. evaporation b. melting d. distribution

Science 4 LSM 2010-2011

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Complete the following table by filling in the boxes with the correct answer. METHODS OF ASEXUAL REPRODUCTION Natural

Artificial It is done by removing a portion of the bark of a healthy stem. Left covered with a small amount of good soil, roots will soon grow on the stem. A bud from one plant is attached to a healthy plant by cutting an opening in the branch of the trunk. It is then removed and replanted once it grows. The stem of one plant is inserted through a spearshaped cut in the middle of the stem of another plant. Portions of stems, roots, or leaves are removed from a plant and rooted in soil and water. A portion of the plant stem bent and covered with soil. Once the roots and young leaves have grown, the stem is cut off.

It is root-like stem that grows underground. Leaves grown on the upper surface. Small plants that grow around the main plant. They can be separated from the main plant once they grow their own roots. A round fleshy stem underneath the ground surrounded by fleshy leaves. Horizontal branches from the base of the plant that can be above or below the soil. An enlarged stem situated beneath the soil. New plants can grow from tiny holes called eyes.

Write TRUE if the statement is true. Replace the underline word with the correct answer if the statement is false. ____________ 1. Temperature indicates the amount of heat present in matter. ____________ 2. In the Farenheit scale, freezing water measures 0 degrees. ____________ 3. The transfer of heat through solid materials from a region of higher temperature to a region of lower temperature is called conduction. ____________ 4. Heat travels in air and water by convection. ____________ 5. In oxidation, heat is transferred by means of waves from an area of greater temperature to a lesser one. ____________ 6. Wood, coal, and petroleum are examples of synthetic fuels. ____________ 7. Kindling point is the temperature at which a fuel starts to burn. ____________ 8. Rapid oxidation is the sudden burning of a substance without the application of an external heat source. ____________ 9. Friction makes your palm hot when you rub them together. ____________ 10. Burning is a form of spontaneous combustion, a chemical reaction between the fuel and oxygen.

Science 4 LSM 2010-2011

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Solve the following problems. Show your solutions. 1.

Find the volume of a box which is 25 cm long, 15 cm wide, and 12 cm thick.

2. Find the density of a ping-pong ball with a weight of 70 g and a volume of 10 mL.

Enumeration. 1. Kinds of flowers a. _______________________________________ b. _______________________________________ 2. Agents of pollination a. _______________________________________ b. _______________________________________ c. _______________________________________ d. _______________________________________ 3. Kinds of fruits based on the structure of their flowers a. _______________________________________ b. _______________________________________ c. _______________________________________ 4. Examples of seed dispersal a. ______________________________________________________________ b. ______________________________________________________________ c. ______________________________________________________________ d. ______________________________________________________________ e. ______________________________________________________________ f.

______________________________________________________________

5. Sources of heat a. ______________________________________________________________ b. ______________________________________________________________ c. ______________________________________________________________ d. ______________________________________________________________

Science 4 LSM 2010-2011

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6. What you can do in case of fire a. ______________________________________________________________ b. ______________________________________________________________ c. ______________________________________________________________ d. ______________________________________________________________ e. ______________________________________________________________ Answer the following questions. 1.

How do plants produce fruits? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

2. What is the difference between monocots and dicots? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 3.

What does a seed need in order for it to germinate and sprout into a new plant? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

4. Why is it that when you put orange juice into a glass of water, the water becomes orange after a few minutes? ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 5. Draw the molecules inside each form of matter inside its corresponding box. How does the arrangement of the molecules inside an object affect its properties? Solid

Liquid

Gas

______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________

Science 4 LSM 2010-2011

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