SCIENCE REVISION ANSWER KEY. QA: KNOWLEDGE AND UNDERSTANDING. a. Fill in the blanks by choosing the words from the box below: 1. Mollusks 2. Vertebrates 3. Invertebrates 4. Arthropods 5. Archaebacterial 6. Cell wall 7. Cytoplasm 8. Air sacs 9. Veins 10. Capillaries 11. Arteries 12. Urinary system b. Choose the best answer by circling the letter. 1. A 2. C 3. D 4. A 5. B 6. B QB: COMPREHENSION: a. Classify the following animals. Place each animal in the correct class in the chart below: CLASS Mammal Bird Reptile Amphibian Fish ANIMAL chimpanzee Duck Rattle snake, Alligator Golden lined frog, Salamander Clown fish, kinger fish, shark 1
Name: Grade 5 ( ) Date: b.write organs and function of each Organ system given below. Organ system Organs Function Nervous system Respiratory system Circulatory system Urinary system Nerves, brains, spinal cord se, Trachea, lungs, air sacs. Heart, blood and blood vessels. Kidneys, bladder, ureter. Control all the body functions. It carries oxygen to the whole body and take out carbon dioxide. Carry oxygen and food to the whole body. Remove wastes from the body Digestive system Mouth, esophagus, stomach, liver, small intestine, large intestine. Helps in digestion. c.how does a nerve cell shape and great length help it to do its job? Answer: Nerve cell shape and great length pass messages quickly through the body d.(i) What are cilia? Answer: Cilia are hair like structures. (ii) What do they do? Answer: Cilia helps in sweeping out germs and dirt from lungs. 2
e.how does a round blood cell shape help it to do its job? Answer: Their disc shape allow it to move easily through blood vessels. f.sequence: In the boxes write in order, the parts of digestive system through which inhaled air passes. Small intestine, esophagus, mouth, large intestine, stomach, Answer: Mouth, esophagus, stomach, small intestine and large intestine. g.sequence: Order, the parts of respiratory system through which inhaled air passes. se, air sacs, trachea, bronchioles, bronchi, Answer: se, Trachea, bronchi, bronchioles, air sacs. h.label the four chambers of heart. Right atrium Left atrium Right ventricle Left ventricle i.list organs of plants. Answer: Flower, Stem, root and leaf 3
j.classify the plants as vascular and non vascular plants, by choosing the words from the box below: Ferns, mosses, flowering plants, conifers Vascular plants Flowering plants, conifers and ferns n vascular plants mosses k.what are the adaptations of small intestine and what is its function? Answer: Adaptation: Villi Function: It absorbs digested food and pass it on to capillaries, which in turn goes into the whole blood. QC: APPLICATION. a. Tell how toads and snakes are different and how are they alike. In your answer consider their body parts, their needs and their life cycles. TOAD Both SNAKE Amphibian (Slimy skin) Have gills when they are young and Have lungs when they are adult. Lay eggs in water Youngs are completely different than parents. Are vertebrates Need, air food, Water and reproduction Reptiles (Scaly skin) Breath with lungs Lay eggs on land Youngs are similar to parents. 4
b. Differentiate between plant and animal cells.. Plant cell Animal cell Have cell wall that protects cell. Do not have cell wall. 1. Have chloroplast in which Do not have chloroplast. 2. photosynthesis takes place. 3. Have large vacuole to store water and food Have small vacuoles. c. How do digestive and circulatory systems work together? Answer: Digest food get absorbed from digestive system through villi into circulatory system which distribute the food through the whole body d. How do respiratory and circulatory systems work together? Answer: The respiratory system works closely with circulatory system for the transfer and transport of oxygen and carbon dioxide. e. How do urinary and circulatory systems work together? Answer: Blood that circulates through the body passes through kidneys which remove wastes from blood. QD: ANALYSIS a. Infer what would happen to a cell if you removed its vacuole? Answer: As vacuole stores food and water for the cell (storage house), if there is no vacuole in unstable conditions, cell will starve to death. b. Infer what would happen to a cell if you remove chloroplast from the plant cell? Answer: As in chloroplast photosynthesis takes place, which makes food for the plant to live. If there is no chloroplast, no food and plant will die. c. Infer what would happen to a cell if you removed its nucleus? Explain your answer. Answer: As nucleus controls all the functions of the cell, if we remove nucleus, cell will be unable to perform any function and will die. d. What is the difference between protest and fungi? Protist Fungi Unicellular (Single celled) Both Single celled and multicellular. Have features of both plants and animals Totally different features from plants and animals. 5
e. look carefully at the dichotomous key below: f. yes yes Born from egg g. Feathers Birds Mammals Scales yes Gills yes Fish Sticky Spine Yes Yes Pacific tree frog salamander Horn lizard Ground skink Which animal is born from an egg have, scales, no gills and no spine? Answer: Ground skink Which animal is born from an egg and has scales and spine? Answer: Horn lizard 6
QE: SYNTHESIS/EVALUATION a. Read the needs of plants paragraph below: Plants need sunlight, soil, air, and water to live. In a recent science experiment, three plants were given the same amounts of sunlight, soil, and air. Plant B was given the amount of water that a plant needs to survive, while Plant A & C was not given any water. What conclusion can you draw about the future of the two plants? Use the graphic organizer to write your facts and your conclusion. FACT # 1: Plant A got sunlight, soil and air but NO water FACT # 2: Plant B got sunlight, soil, air and water. CONCLUSION: Only Plant B will grow better as it got all its needs FACT # 3: Plant C got sunlight, soil and air but NO water 7