SCIENCE 5 QTR 1 A. Identify what is being asked. Choose your answer from the list of words below. Classifying measuring hypothesis control variables Comparing scientific method predicting scientists Inferring independent variables observing variables _______________________1. They generate knowledge using the scientific method and seek to explain the events in the natural world. _______________________2. It requires the use of your sense of sight, hearing, smell, taste and touch. _______________________3. It means making a forecast of what will happen in the future. _______________________4. These are variables that remain the same throughout the experiment. _______________________5. This is the process of grouping objects and ideas that are alike in some way. _______________________6. It is the possible explanation to a scientific question. _______________________7. This is the factor that can be changed in an experiment. _______________________8. It is the process of discovering the similarities and differences in the properties of objects and events. _______________________9. It is the step by step process of solving problems. _______________________10. These are the traits, factors or conditions in the experiment that differ in amounts or types. B. Put a check if the statement is correct. Otherwise, correct the underlined word to make the statement true. ____________________1. Puberty begins at ages 7-9. ____________________2. Progesterone triggers the development of secondary male characteristics. ____________________3. Testosterone triggers the development of secondary female characteristics. ____________________4. The first period is called menarche. ____________________5. Puberty indicates the maturation of the sex organs for both male and female. C. Write G on the blank if the change in the body during puberty occurs among girls, B if it is for boys and GB if it occurs for both. _______1. Voice becomes deeper _______6. Voice becomes higher _______2. Larger and stronger muscles _______7. Onset of menstruation _______3. Rapid growth in height _______8. Wet dreams are experienced. _______4. Enlargement of breasts _______9. Hips get bigger _______5. Sweat glands become active _______10. Skin and hair become oily D. Encircle the letter of the correct answer. 1. Which organ produces sperm? a. epididymis b. uterus c. testes d. fallopian tube 2. Which organ does not belong to the group? a. glans b. penis c. uterus d. scrotum 3. What will happen if living things are unable to reproduce? a. Population will decrease. b. Population will increase. c. Competition among animals will intensify. d. The organisms will not be able to adapt to their environment. 4. Which part of the male reproductive system serves as the passageway for the sperm from the testes to the seminal vesicle? a. prostate gland b. urethra c. vas deferens d. scrotum 5. Which part of the female reproductive system releases the egg cell and hormones like estrogen and progesterone? a. ovary b. cervix c. vagina d. oviduct E. Match Column A with Column B. Column A Column B ____1. Connects the uterus to the vagina a. ova ____2. Produces sperm cells b. testes ____3. Also called the womb c. uterus ____4. The monthly bloody discharge d. diploid ____5. Cell with a complete set of genetic materials e. ovaries ____6. Female sex cells or gametes f. cowper’s gland ____7. Union of the sperm and egg cell g. penis ____8. Sac-like skin structure that supports the testes h. fertilization ____9. Transports sperm cells to the urethra i. fallopian tube ____10. Copulatory organ of males j. prostrate gland k. scrotum l. menstruation m. cervix F. Put a check if the statement is correct. Otherwise, correct the underlined word to make the statement true. _______________________1. The canal through which eggs pass from the ovary to the uterus is called the cervix. _______________________2. A few species of fish possess both sets of sexual organs, and they are called hermaphrodites. _______________________3. The cloaca is an opening through which sperm, egg and waste materials pass. _______________________4. The modified fins of male sharks and rays are called papilla. _______________________5. Birds have two functional ovary/ovaries. _______________________6. Both male and female birds have no cloaca. _______________________7. The oviduct of the female cat is the actual site where fertilization occurs. _______________________8. Sexual dimorphism is the difference between males and female sex organs. _______________________9. Metamorphism is the term used to describe organisms that carry both sexual organs. _______________________10. The vagina is a structure that receives the sperm delivered by the male through the penis. G. Identify what is being described. Choose from the list below. Internal fertilization Spawning External fertilization parthenogenesis gestation Tarsier budding sexual reproduction copulation Lion asexual reproduction fertilization __________________________________1. It is a mode of reproduction where cells from only one parent are used and no reproductive organs are involved. __________________________________2. It is a mode of reproduction where two parent organisms are involved. __________________________________3. It is the process of introducing sperm cells inside the body of a female animal. __________________________________4. This is the period of between conception and birth during which a fertilized egg develops into a more complex organism. __________________________________5. It occurs when an organism grows a bud from its main body. __________________________________6. This is a kind of asexual reproduction that occurs naturally In some invertebrates like the species of wasps, bees and ants. __________________________________7. It is the union of the egg with the sperm cell. __________________________________8. This type of fertilization takes place inside the parent’s body. __________________________________9. It is a process of releasing a large amount of eggs in the water which are immediately fertilized by sperm cells. __________________________________10. This animal gives birth to one offspring after the gestation period.