Half Yearly Exam 2017
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1 GOZO COLLEGE Secondary School KULLEĠĠ TA GĦAWDEX Skola Sekondarja Half Yearly Exam 2017 Year 7 Levels: 5-8 SCIENCE Time: 1:30min Name: Class: Year 7 Instructions to Candidates Answer all twenty questions. Write on this paper. Do not spend too much time on any one question. Good English and orderly presentation are important. Information to Candidates The mark of each question is written beside or at the end of each question. Each correct answer carries one mark. The total mark scored will be given as a percentage mark. Question Maximum Mark Question Paper total Final mark Maximum % Mark X 0.55 =
2 Q1. Stephen is preparing a list of apparatus for an experiment to find out how long it takes for 100mls of tap water to start boiling. (7 marks) a) Name the seven pieces of apparatus you can see in the picture below b) Stephen realised that he also needs a beaker, a stop clock and a thermometer. Draw the apparatus in the space below. (4 marks) Beaker Round Bottom Flask Stopwatch Thermometer c) Fill in the table with the proper apparatus needed to: (6 marks) i ii Action Measure 100ml of water Heat the water in a beaker Apparatus needed iii Record the time taken to heat the water iv Read the temperature of the water d) Name two measuring instruments Stephen used. i. and ii.. Q2. Read the scales and state the unit of measurement in the table. (10 marks) Seconds (s) A B C Integrated Science Year 7 Levels 5-8 February 2017 Page 2 of 13
3 Instrument Reading Unit Use this A B C D E D E Q3. Peter tried to find the volume of an irregular shaped stone using water displacement. Help Peter to fill in the table and draw a conclusion. a. Table of results Volume of stone + water ml Volume of water Volume of stone ml ml (5 marks) b. Conclusion: The volume of water displaced is.. (equal, less, more) to the volume of the stone when the stone is.. (fully, not fully) under water. Q4.The diagram represents a pendulum. A group of students timed, in seconds (s), how long it took for the pendulum to complete one swing (back and forth) for five different string lengths. The results are shown in the data table. (7 marks) a. What measuring instrument did the group of students use? b. The dependent variable in this experiment is measured in. c. The independent variable is the of string measured in d. The results show that the longer the string, the (longer, shorter) is the time to complete one swing of the pendulum. Table of Results String Length Time to Complete (cm) One Swing (s) e. Predict the time of one swing for a pendulum with a string length of 70 cm. s Integrated Science Year 7 Levels 5-8 February 2017 Page 3 of 13
4 Q5. The table below shows the hazard symbol on four reagent bottles in the lab. Hydrochloric acid Arsenic Potassium perchlorate Mercury (a) Which of the above chemicals could cause: (3 marks) i. Wrecked garden shed?.. ii. Holes in clothing? iii. Dead fish in a river? (b) A student plans to investigate how different metals react with acids. Which hazard symbol would the student see on a bottle of strong acid? Circle one symbol. (c) What does the hazard symbol that you chose in part (b) mean?... (d) Write down two safety precautions the student should take doing the experiment. i. ii.... (e) Suggest one reason why one needs to take safety precautions when handling acids. (5 marks) (f) Draw the warning symbols for: i. Harmful ii. flammable (2 marks) Integrated Science Year 7 Levels 5-8 February 2017 Page 4 of 13
5 Q6. a) Label the Bunsen burner below. Write the number next to the label. (6 marks) Number Label base barrel collar rubber tubing inner cone outer flame b) Put the given instructions in order to light up the Bunsen burner safely. Number 2 Instruction Put the Bunsen burner on the heat-proof mat and connect the rubber tube into the gas tap. 4 Turn on the gas tap and light the burner. 1 Put up your hair and sleeves 5 Open the air hole slowly. Watch the changes in the flame. 3 Close the air hole. (4 marks) c) Why is it safer to keep the Bunsen burner burning on the yellow flame when not in use? d) Name the three things in the fire triangle needed to support a flame burning? e) Firemen cut trees ahead of a woodland on fire. Which thing from the fire triangle are they removing to stop the fire spreading?.. (5 marks) Integrated Science Year 7 Levels 5-8 February 2017 Page 5 of 13
6 Q7. Look at the three pictures: a. Tick [ ] the life processes carried out by the car, the bird and the tree. Life Process Car Bird Tree Senses Moves Grows Takes in food Takes in oxygen Gets rid of waste Reproduces b. Which of the three carry out all the seven life processes?.. and.. c. Is the car a living thing? Give two reasons for your answer.... d. What do we call things that have never been alive?. (9 marks) Q8. The diagram below represents a plant. Label the plant structures (parts) A - E. (8 marks) A a. Fill in the table by identifying the structures and describing one function (job) of each. B Label Structure One function (job) of the structure C A D B C E D Stem Supports the plant E b. Plants make their own food by photosynthesis. Fill in the table with the three things needed by the plant to make photosynthesis and from where it gets them? Things needed Water Light energy From where the plant gets it? From the air (3 marks) Integrated Science Year 7 Levels 5-8 February 2017 Page 6 of 13
7 c. Complete the word equation for photosynthesis. (3 marks) Water + Carbon dioxide Glucose +.. d. (i) The energy needed for photosynthesis comes from the.. (ii) The green pigment chlorophyll in leaves is used to trap. Q9. The diagram represents two gases being cycled through an ecosystem. (a) Letter X represents one of those gases. Name gas X. (b) Which process releases energy from digested food? (1) Photosynthesis (3) exercise (2) Cellular respiration (4) fertilization (2 marks) Q10. Identify the odd one out in each set of animal pictures. Give a reason. a. The odd one out is the because it is a _ and the others are all. (3 marks) Salmon shark sea snake sturgeon b. The odd one out is the _ because it is an and the others are all _. (3 marks) tortoise bat penguin snail puppy c. The odd one out is the _ because it is a and the others are all sea _. (3 marks) shark dolphin sea cow walrus killer whale sea lion Integrated Science Year 7 Levels 5-8 February 2017 Page 7 of 13
8 Q11. A number of living things are neither plants nor animals. (2 marks) Which two organisms belong to kingdoms other than that of plants and animals? moss Pine tree Bacteria Mushroom (fungus) Q12. Ragid read this information about amphibians in a scientific journal. (8 marks) The least well-known amphibians are caecilians. They are long, wormlike animals with no limbs, a bony skeleton, and needle sharp teeth. They also have a pair of tentacles on their heads. Most caecilians live underground, where they use their pointed snouts and strong skulls to burrow through soil like a shovel. They prey on smaller animals, such as insects and worms. Some species live in water and have a tail fin for swimming. All caecilians live in warm, tropical parts of the world. The largest caecilians can grow to more than 1.5 m in length. a) Do caecilians have a backbone?. b) Name two habitats where caecilians live... and. c) How are caecilians adapted to live: i. underground.. ii. in the water... d) On which do caecilians prey? and. e) Are caecilians herbivores or carnivores? Q13. The drawings below show ten animals. (12 marks) Snake sparrow cat dragonfly frog Hawk lizard squirrel fly salmon Integrated Science Year 7 Levels 5-8 February 2017 Page 8 of 13
9 (a) Circle two animals that do not have a backbone. (b) What are animals without a backbone called? _. (c) Fill in the table using the animals above. Example Vertebrate group Characteristic body cover Hawk Snake Frog Mammal Fish Covered in smooth, moist skin Q14. The diagram below shows a food chain. (1mark) What do the arrows in the diagram represent? (1) flow of energy (3) one community replacing another (2) life cycle stages (4) renewable resource depletion Q15. The plants in drawings 1-4 are adapted in different ways for survival tiny leaves Match statements, A, B, C and D with the drawings 1-4. (4 marks) The plant has leaves adapted: Number A for floating 3 B to deter predators 1 C for climbing 2 D to reduce water loss 4 Integrated Science Year 7 Levels 5-8 February 2017 Page 9 of 13
10 Q16. The picture shows a basilisk lizard. Some of the adaptations of the lizard are labelled. (6 marks) Basilisk lizards are often found resting on branches of trees that grow next to water. Basilisk lizards can run across the surface of the water. 1 (a) Draw one line from each adaptation of the lizard to the advantage of the adaptation. Adaptation Toes on the back feet are webbed Advantage For camouflage on branches of trees Helps the lizard to balance when running Long tail Warning colours to deter predators Brown skin Increases surface area in contact with water (b) Suggest one advantage to the basilisk lizard of being able to run across the surface of the water.... (c) Animals, such as lizards, compete with each other. Give two factors that animals compete for. Tick () two boxes. Oxygen Food Light Territory Q17. The drawings below represent four different birds. The beak shape makes it easy for each bird to obtain food in a different way. A B C D a. The differences in beak shape are examples of (1) camouflage (3) dynamic equilibrium (2) competition (4) biological adaptation b. Which two birds compete for the same food?.. and (3 marks) Integrated Science Year 7 Levels 5-8 February 2017 Page 10 of 13
11 Q18. Use the living things in the given food web to answer the questions below. Stoat Owl Fox Blue tit Rat Rabbit Beetle Grass a. Compose any two food chains from the food web above. (6 marks) i. Food chain 1:. ii. Food chain 2: b. Write three names from the food web to make a food chain which ends with owl owl c. (i) Which living thing in the food web is an insect?. (ii) Farmers spray their plants with insecticide to kill insects. Suggest how insecticide on the plants gets into the insects.. (iii) Suggest why the rat is called an omnivore? c. Use the information in the food web to fill in the tables below. (12 marks) Table 1 Name Example 1 Example 2 1 producer 2 consumers 2 herbivores 2 carnivores 2 secondary consumers 2 tertiary consumer 1 predator / prey Integrated Science Year 7 Levels 5-8 February 2017 Page 11 of 13
12 d. Name two predators and their respective prey. (One example is given) (4 marks) Predator Blue tit Table 2 Prey Beetle e. What is the most likely outcome of a severe fall in numbers of foxes? (3 marks) Number of: Increases Decreases Rabbits Owls Vegetation Q19. Complete the chart below by identifying the change of state that caused each event. (3 marks) Diagram A Event Diagram B (2 days later) Change of State 1) Water droplets formed on the outside of the glass in A. Condensation 2) Ice no longer visible in B. Melting 3) The level of water in the glass dropped in B. Evaporation Q20. The diagram below represents particle models for the three states of matter. (a) Which particle model best represents the examples given? (6 marks) Example Letter i. Ice cubes C ii. Steam A iii. Sea water B iv. Air A A B C v. Orange juice B vi. Ice lolly C (b) Mark the correct property for each of the three states by symbol X. Property Solid liquid Gas i. Remains the same shape x ii. Particles arranged in a fixed pattern x iii. Particles close together x x iv. Particles move around each other x v. Flows through pipes x x vi. Compresses - can be squashed x vii. Particles far apart x viii. Particles moving at very high speeds x (10 marks) Integrated Science Year 7 Levels 5-8 February 2017 Page 12 of 13
13 Integrated Science Year 7 Levels 5-8 February 2017 Page 13 of 13
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