Year 9 Science Exam 2023 - Physical World PDF

Year 9 Science School Examination 2023 (Recommended Time: 40 minutes) Physical World INSTRUCTIONS Write your name, whanau class and circle your teacher code in...

Year 9 Science School Examination 2023 (Recommended Time: 40 minutes) Physical World INSTRUCTIONS Write your name, whanau class and circle your teacher code in the spaces below. Name: ______________________________________ Whanau Class: ____________ Teacher: KJT MSO ALM GLI SSH KDG ARJ AMM VDY KBY Overall Grade: ____________ [CIRCLE your teacher’s Code above] This paper consists of three sections. You are advised to spend your time as suggested below. Maximum Suggested Section Description Possible Time Grades Scored Grade (minutes) A Multiple Choice A 7 A B Matching/Fill in the blanks M 8 A M C Short Answer E 25 A M E  Attempt all questions in the spaces provided in this booklet.  In numerical questions, all working, including any rearrangement of formulae, should be shown. The answer should be with an SI unit.  For all ‘describe’, ‘explain’ or ‘discuss’ questions, the answers should be in complete sen- tences.  If more space is needed, then use the pages at the end of this booklet. Record the ques- tion numbers you are answering. YOU MUST HAND THIS BOOKLET TO THE SUPERVISOR AT THE END OF THE ASSESSMENT 1 Botany Downs Secondary College School Examination 2023 Instructions: How to answer Multiple Choice Questions. Examiner’s Use 1. Circle the letter of the best answer. Example: Who Won the 2022 Sevens Rugby World Cup? A. New Zealand B. Fiji C. Australia D. Ireland 2. If you change your mind, cross out your first choice and draw a circle around the letter of your next choice. Example: A. New Zealand B. Fiji C. Australia D. Ireland 3. If you change your mind again and like your first answer better, cross out your second choice and tick ( ) your first choice. Example: A. New Zealand B. Fiji C. Australia D. Ireland NO MARK WILL BE GIVEN IF YOU CIRCLE MORE THAN ONE LETTER AS THE ANSWER FOR A QUESTION. Question 1 Which of the following cannot be a unit of speed? A. metres per minute B. centimetres per second C. kilometres per second D. seconds per metre Question 2 A dog ran a distance of 100 m at a constant speed of 5.0 m/s. How long would it take the dog to run this Distance? You may use the formula: V = d/t A. 20 second B. 200 second C. 500 second D. 0.05 second 2 Botany Downs Secondary College School Examination 2023 Question 3 Examiner’s Friction is a force that acts between two surfaces that are in contact with each other. Which of the following Use statement is NOT correct about friction? A. Friction force always acts in the same direction as the applied force. B. Friction force always slows down a moving object. C. Friction force can be useful and also be a nuisance. D. Friction force between two objects converts energy into heat. Question 4 When a ray of “white light” is shown through a triangular glass prism, it splits into a spectrum of colours as shown in the diagram on the right. The colours of light can be categorised as primary or secondary. A primary colour is one which cannot be made by mixing other colours. Which of the following sets of colours correctly states the primary colours of light? A. Red, Yellow, Blue B. Red, Blue, Green C. Blue, Green, Yellow D. Red, Green, Purple Question 5 The diagram given on the right shows how a pen appears when placed in a clear glass containing water. The pen appears to be bent. Which of the following property of light could be used to explain why the pen appears to be bent when seen in a glass of water? A. Interference of light B. Refraction of light C. Reflection of light D. Dispersion of light 3 Botany Downs Secondary College School Examination 2023 Section B: Fill in the blanks and Labelling Examiner’s Question 1: Energy Transformation Use The diagram on the right shows a toy car rolling down a slope from a certain height. Use the word bank given below to fill in the Word List: elastic, heat, friction, gravitational, kinetic, electric, electric blanks. As a car travels down a slope, the __________________ potential energy of the car is converted into ___________________ energy. Additionally, some of the potential energy is lost due to _______________ between the tyres and the road and air resistance, resulting in a portion of it being dissipated as _______________ energy. Question 2: Optical Apparatus The diagram given below shows 4 common optical apparatus labelled A, B, C and D. A B C D a) State the name each optical apparatus in the diagram above. A ________________________________ B ________________________________ C ________________________________ D ________________________________ b) State a use of the apparatus B and C. B C 4 Botany Downs Secondary College School Examination 2023 Question 3: Human Eye Examiner’s Use The diagram given below shows the model of a human eye. a) Name the part of the eye represented by the letters in the diagram above. A _________________________________ B _______________________________ C ______________________________ D ____________________________ b) State the function of the following parts A and B. A B c) The diagram given below shows two light rays entering a human eye model. Arrow representing light ray Arrow representing light ray Complete the ray diagram above to show how the light rays entering the eye will bend and meet for a person with a normal eyesight. 5 Botany Downs Secondary College School Examination 2023 Section C: Short Answer Questions Examiner’s Question 1 Reflection of light Use Objects can be classified as either opaque, translucent, or transparent. Refer to the diagrams given below to answer the following questions. Black Brick Wall White Shiny Tile Wall Coloured glass Clear Glass a) Classify each object as either opaque, translucent, or transparent. Black Brick Wall White Shiny Tile Wall Coloured glass Clear Glass b) What is an opaque substance? c) Consider “white light” rays hitting the black brick wall and the shiny white tiled wall. Explain why the black brick wall appears black and the white tiled wall appears white when seen under “white light”. d) A ray of light hits the clear glass as shown on the right. Incident ray Complete the ray diagram on the right to show how light will reflect. In your answer:  Draw the normal,  Draw the reflected ray,  Label the angle of incidence and angle of reflection. 6 Botany Downs Secondary College School Examination 2023 Question 2 Optical Illusion Examiner’s Use When the light from a “light source” falls on a coloured object, some of it gets reflected off the surface of the object. This reflected light from the ob- ject enters our eyes which enables us to see the object. The diagram given on the right shows a bunch of red roses with some green leaves. a) Fill in the missing sections of the table given below. The first one is done for you. Colour of light shown on the White light Yellow light Cyan light rose bunch Colour of rose Rose = Red Rose = Rose = bunch observed Leaves = Green Leaves = Leaves = b) Give an explanation for the answer that you have written in the table above: (i) Appearance of red roses and green leaves in yellow light. (ii) Appearance of red roses and green leaves in cyan light. 7 Botany Downs Secondary College School Examination 2023  8 Botany Downs Secondary College School Examination 2023