Download HighFour General Sciences Round 2 Category A: Grades 4 – 5

HighFour General Sciences Category A: Grades 4 – 5 Round 2 Monday, October 17, 2016 The use of calculator is not required. Question #1 Which one of the following expands the most when heated? A: B: C: D: Question #2 brass nitrogen milk clay Greg is bringing some chilled soft drinks on his cycling trip. He wants them to stay chilled for a longer period of time. Which box should he use to store his soft drink? A: B: C: D: Question #3 steel box copper box brass box plastic box The lid of the jar shown cannot be opened easily. Which of the following methods is the most appropriate to open the jar? A: B: C: D: Question #4 Which of the following statements about magnets is true? A: B: C: Hit the center of the lid repeatedly with a hammer for ten minutes. Leave the whole jar under the tap with hot water flowing over it continuously for ten minutes. Place the jar into a trough of hot water and put some ice cubes on top of the lid. Leave the jar upside down in a basin of hot water and place some ice cubes on the bottom of the jar which is facing upwards. D: Magnetism can pass through non-­‐magnetic materials. Magnetic force can only act at its poles. True magnetic force becomes stronger when it attracts more iron nails. A bar magnet can attract all kinds of metal. HighFour General Sciences Category A: Grades 4 – 5 Round 2 Monday, October 17, 2016 The use of calculator is not required. Question #5 Which of the following ways will not make the magnet lose its magnetism? A: B: C: D: Question #6 Which of the following actions will not generate heat energy? A: B: C: D: Question #7 Rubbing a stone on the ground vigorously Sawing a piece of wood in half Putting a cup of tea in the fridge Leaving the radio on for a few hours What causes the leaves of a plant to be green? A: B: C: D: Question #8 Hit the magnet hard with a hammer a few times. Throw the magnet to the floor repeatedly. Coat the magnet with a layer of oil. Hang the magnet above the candle flame for an hour. sunlight starch stomata chlorophyll Which of the following statements is correct for all ferns and fungi? A: B: C: D: Both can move from place to place by themselves. Ferns are not poisonous but fungi are. Both reproduce through spores. Both contain chlorophyll. HighFour General Sciences Category A: Grades 4 – 5 Round 2 Monday, October 17, 2016 The use of calculator is not required. Question #9 Which of the following statements is true? A: B: C: D: Question #10 The large intestine is shorter than the small intestine. Food stays in our stomach for 5 hours. Waste leaves our body through the rectum. The digestive juice in the small intestine is the first to act on the food. Which of the following statements about the function of the stem of a plant is incorrect? A: B: C: D: Question #11 What are the advantages of using magnets in Maglev trains? A: B: C: D: Question #12 To carry water and mineral salts from the roots to all parts of the plant. To carry food made by the leaves to other parts of the plant. To support the branches and leaves so that they can get maximum amount of sunlight. To carry carbon dioxide from the leaves to all parts of the plants. The train is able to achieve higher speeds. The train will be able to brake efficiently. The train will be more stable. The train will be lighter. Which of the following animals is not an insect? A: B: C: D: ant spider praying mantis dragonfly HighFour General Sciences Category A: Grades 4 – 5 Round 2 Monday, October 17, 2016 The use of calculator is not required. Question #13 Which of the following materials comes from plants? A: B: C: D: Question #14 silk cotton nylon wool Acute mountain sickness can affect mountain climbers at high altitudes above 2400 meters. Which body system(s) is/are affected by this activity? (Select all that apply.) A: B: C: D: Question #15 How are our teeth useful to us in the digestive system? A: B: C: D: Question #16 digestive system respiratory system muscular system circulatory system They enhance our features. They help the tear, chew and grind the food into smaller pieces. They produce digestive juices. They help to roll the food particles into balls to ease swallowing. How can a magnet be demagnetized? (Select all that apply.) A: B: C: D: Dropping on the floor repeatedly. Placing it under the sun for an hour. Heating it over an open flame. Soaking it in water for a few hours. HighFour General Sciences Category A: Grades 4 – 5 Round 2 Monday, October 17, 2016 The use of calculator is not required. Question #17 Which of the following is the correct order of the life cycle of a mosquito? A
B
A: B: C: D: D
C
Question #18 Which of the following four statements is not true? A: B: C: D: Question #19 A: egg → B: wriggler → C: pupa → D: mosquito A: wriggler → B: egg → C: pupa → D: mosquito A: pupa → B: wriggler → C: egg → D: mosquito A: egg → B: pupa → C: wriggler → D: mosquito The properties of a material can be altered if mixed with other substances. Any single item can only be made using one material. A material can be made into different objects. An object can be made of different materials. Which bodily system works together with the digestive system to transport digested food to all parts of the body? A: B: C: D: Question #20 Which one of the following statements about our bones is incorrect? A: B: C: D: respiratory system skeletal system muscular system circulatory system The bones in our body are joined to one another. All the joints in our body allow free movements. Some bones are straight while others are curved. The bones in our body come in different sizes.