Name Science Final Examination Revision sheet Year 3 Rocks and Soils 1. Match the type of rock to how it is formed:

Transcription

1 Name Science Final Examination Revision sheet Year 3 Rocks and Soils 1. Match the type of rock to how it is formed: a) Igneous rocks When rocks are eroded by wind and water, they break into small pieces and settles near rivers, oceans or lakes to form rocks over the years. b) Metamorphic rocks Cooling of magma or lava over a long period of time. c) Sedimentary rocks When rocks change from one form to another due to pressure and heat. 2. Complete the empty boxes in the table correctly: Type of Rocks Example of rocks Uses of Rocks granite Used as an ingredient in tooth paste. Metamorphic rock Page 1 of 19

2 3 John tests the rocks for hardness. He uses each material to try to make a scratch on the other rocks. He records his results in a table. Rock Scratched easily by a finger nail? Scratched easily by a copper coin? Scratched easily by an iron nail? A No Yes Yes B Yes Yes Yes C No No Yes D No No No a)which rock was the hardest?... b) Use the information in the table to explain how you know this was the hardest rock A fourth grade class observes rocks. One sample is found in layers and feels rough and grainy. Which type of rock is it? A. sedimentary B. igneous C. granite D. metamorphic 5 Which soil allow water to pass through quickly through the soil? A sandy soil B clay soil C silt soil 6 A person who studies about fossils is known as. A Dentist B Meteorologist C Paleontologist. Page 2 of 19

3 7 The never-ending process by which rocks are changed from one type into another is called. A. the water cycle. B. the soil cycle. C. the rock cycle. D. the Earth s cycle. 8 Scientists use clues from these to learn about the past. A. Animals B. plants C. soil D. fossils 9 Many fossils are found in this type of rock. A. igneous B. metamorphic C. gravel D. sedimentary 10 Complete the table Soil Texture Colour Size of the particles Clay Sandy 11 Explain the importance of Earthworm in soil formation? Fill in the boxes and complete the process how fossils are made by choosing the letter for each box in the correct order. A After a long time, the animal bones change into rock-like minerals in the shape of the original animal. C A fossil is created in the shape of the original animal. An animal dies. D And animal is covered by sediment B Page 3 of 19

4 13 Why would chalk be a bad choice of rock to use to make an statue for the garden? Movement and Feeding 1 The diagram below shows Jane eating noodles. She uses a pair of chopsticks to pick the noodles. Name the body system that works with the muscular system to enable Jane to pick up the noodles from the plate with a pair of chop sticks The diagram below shows the skeletal system Which one of the following statement best describes the function of W and X? a)allow exchange of gases b) enable us to stand upright c)protect the internal organs d)work together to enable the body to move Page 4 of 19

5 3 The diagram below shows a human arm. What happens to Muscle A and Muscle B in order for the arm to be straightened? Colour the correct Row Muscle A Muscle B 1 Contracts Contracts 2 Contracts Relaxes 3 Relaxes Relaxes 4 Relaxes Contracts 4 This is a drawing of a human skeleton. Name the parts of the skeleton. Write ONE word in each box below. (b) Describe Three different ways that the skeleton is important to the human body Page 5 of 19

6 5 This bird eats only meat. Meat is all it needs for its bones to stay strong. If If humans ate only meat, their bones would not stay strong. a) Tick ONE box to show what is best for humans to eat to keep their bones strong. b) Describe a different way humans can keep their bones strong Look at these three menus 1 2 Steamed fish 3 Bread and Butter Potatoes Chips Carrots Cake Spinach Roast Chicken Rice Cabbage Cheese a) Which menu is healthiest? Why? Suggest few foods for growth and food for health for your friend Food for growth Food for health Page 6 of 19

7 Forces and Magnets 1 Classify the objects in the box correctly into the classification below Eraser ceramic plate gold coin copper wire iron nail steel ruler 2 The diagram below shows a U-shaped magnet. Which part of the magnet can attract the most iron filings? Page 7 of 19

8 3 Kate had a bar magnet, magnet A and a rod Magnet, Magnet B. She wanted to find which magnet was stronger. She placed one on Magnet A on one end of the ruler and slowly pushed a paper clip along the ruler towards the magnet until the clip was attracted. She repeated the steps using magnet B She recorded the results Magnet A B Distance at which the paper clip is attracted to magnet 4 cm 3cm a) Complete the bar graph Page 8 of 19

9 b)which magnet is weaker? b) Explain your answer in (a) a) Tick the magnets that WILL attract. b) Complete the following sentences using either repel or attract. (i) The North pole of a magnet is held near the North pole of another magnet. The magnets... each other. (ii) The South pole of one magnet is held near the North pole of another magnet. The magnets... each other. (iii) Like poles and unlike poles Page 9 of 19

10 5 Children tested the strength of the four magnets by finding out how many steel paper clips each magnet held. Magnet Number of paperclips picked up Magnet A 3 Magnet B 8 Magnet C 5 Magnet D 2 Look at the results in the table a) Which magnet is the strongest? b) Explain how you decided which is the strongest magnet? Page 10 of 19

11 Plants 1 Study the diagram below. What are the function of the part labelled W? A It holds the plant firmly to the ground B It takes in water and mineral salts from the soil C It carries water and mineral salts to all parts of the plant 2 Jane conducted an experiment of a plant. She mixed some red coloring with water in a beaker. She then placed the stem into a beaker as shown below. She left it aside for 2 days. On the third day, she discovered that the leaves and flowers had become red. Which one of the following part of the plant could have helped transport the red colouring? a) Flower b) stem c) root d) thorn Page 11 of 19

12 3 Sara covered the leaves of the plant A with black paper as shown in the diagram below. She placed both the plants A and B in the sun and watered them regularly. a) What would happen to plant A after few weeks? b) What conclusion should Sara make from this experiment? The picture below shows the tomato plant. Different parts of the plant are labeled P, Q, R and S. a)tomato plant will not be able to make food if part is removed completely. Page 12 of 19

13 b)explain how plants prepare food Alice was looking at a flower. She cut it through the middle and drew this diagram. a) Label the flower using the words from the list b) Alice noticed that the flower was brightly coloured and smelled nice. Her mother told her that this was to attract insects. Why would a plant want to attract insects to its flowers? Page 13 of 19

14 6 Class 4B decide to investigate how well cress seeds grow in these different conditions: Pot 1 = warm and water Pot 3 = cold and water Pot 2 = warm and no water Pot 4 = cold and no water They planted 25 seeds in each pot. After 10 days they counted how many seeds had germinated. a) Name two factors they must keep the same to make it a fair test. same number of seeds same amount of warmth same amount of water same size of pot Here is a table of their results: warmth cold water 20 seeds germinated 2 seeds germinated no water 0 seeds germinated 0 seeds germinated b) How many seeds germinated when it was cold with no water? c) Which were the 2 best conditions for the cress to germinate? Page 14 of 19

15 7 a) How do the following plants disperse their seeds? Choose wind, animal or explosion. b) Explain why seeds need to be scattered away from the parent plant..... Page 15 of 19

16 Light and Shadow 1 The things below all make shadows in light. Draw ONE line from each object to the shadow it could make. Use each shadow ONCE. 2 Jenny investigates which materials allow light to pass through. She holds different materials out in the sun. Complete the table below to predict Jenny s results. Tick ONE box in each row. One has been done for you. Material tissue paper glass mirror clear plastic cardboard foil Some light passes through No light passes through Page 16 of 19

17 3 Jenny sits by a lamp. A shadow forms. She wants to see if any other objects will cause a shadow in a dark room. She turns the lamp off. She sits in front of these objects instead of the lamp: Television mirror plant night safety jacket (i) Which ONE of these four objects will cause a shadow of Jenny in a dark room?.... (ii) Why does a shadow form when Jenny sits in front of this object? Tick ONE box. Because the object... is translucent. reflects light. is a light source. is transparent. Page 17 of 19

18 4Tick which of the following are light sources? 5 We see objects when light bounces off them and into our eye. Draw arrows below to show how this works. 6 Why is your shadow sometimes in front of you and sometimes behind you? Lucy makes a shadow of a puppet on a screen. She investigates how changing the distance of the light from the puppet affects the size of the shadow. Page 18 of 19

19 a) What equipment should she use to measure the distance of the light from the puppet? b) What unit of measurement should she use to measure the distance of the light from the puppet? Tick ONE box. g ºC cm km c) What factor should she change as she carries out her test? Tick ONE box. where the children sit brightness of the light position of the screen colour of the screen position of the light the size of the puppet c) What happens to the shadow of the puppet when Lucy move puppet towards the light source? Page 19 of 19