Reqelford International School Year 2022 - 23 Name: ……………………………………………………….. Date: 10.01.2023 Grade: 6IG Subject: COMBINED SICENCE Duration: 1 HR 30 MINS Max. Marks: 40 MARKS PERIODIC TEST 3 GENERAL INSTRUCTIONS All the questions are compulsory. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Multiple choice questions o Each correct answer will score one mark. A mark will not be deducted for a wrong answer. o Any rough working should be done in this booklet. o Electronic calculators may be used. o For each question there are four possible answers A, B, C and D.Choose the one you consider correct and indicate it with a circle around the right option. Theory/Alternate to practical o You may lose marks if you do not show your working or if you do not use appropriate units. o The number of marks is given in brackets [ ] at the end of each question or part question. o Any rough working should be done in this booklet. o Electronic calculators may be used. 40 MULTIPLE CHOICE QUESTIONS 1. An organelle that controls all activities in a cell (a) Cytoplasm (b) Nucleus (c) Vacuole (d) Chloroplast 2. Cells comes from (a) Other pre-existing cells (b) Cytoplasm (c) Cell organelles (d) None of the above RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP 10M 3. A cell stores water, food or waste products in (a) Cytoplasm (b) Nucleus (c) Ribosome (d) Vacuole 4. The power house of the cell is (a) Ribosome (b) Mitochondrion (c) Nucleus (d) Chloroplasts 5. Which waves consist of compressions and rarefactions? (a) Transverse waves (b) Longitudinal waves (c) Electromagnetic waves (d) Light waves 6. In which of the following speed of sound is maximum? (a) Space (b) Air (c) Water (d) Gold 7. Echoes are sounds that are ---------------- from a surface (a) Reflected (b) Refracted (c) Propagated (d) Absorbed 8. In SONAR we use (a) Infrasonic waves (b) Electromagnetic waves (c) Ultrasonic waves (d) Radio waves RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP 9. Sound is produced by --------------- of particles (a) Emission (b) Vibration (c) Reverberation (d) Emulsion 10. ------------------------------- is the scientist who saw small chambers wen looking at cork and named them ‘cells’ (a) Newton (b) Robert Hooke (c) Robert Watson (d) Carson THEORY 1. 20M The diagram shows what a root hair cell looks like when viewed with a microphone. (a) Identify the structure labelled A and B on the diagram. A. …………………………………………………………………………………………………. B. ……………………………………………………………………………………………….[2] (b) Describe one way you can tell that this is a plant cell and not an animal cell. ……………………………………………………………………………………………………… …………………………………………………………………………………………………...[1] (c) Which cell structure, usually found in plant, is missing from root hair cells? ……………………………………………………………………………………………………… …………………………………………………………………………………………………...[1] RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP (d) Write down one function of a root hair cell. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………[1] 2. Lily bought some fresh apples and lemons and placed them in a bowl near the kitchen window. A few days later. Lily’s apples had turned brown and were smaller and shrivelled. The lemons had green mould growing on them. (a) Explain why the apples had become smaller and shrivelled. ……………………………………………………………………………………………………… ………………………………………………………………………………………………….[1] (b) The mould grew from spores on the skin of the lemons. Suggest where these spores came and how they got onto the lemon. ……………………………………………………………………………………………………… ………………………………………………………………………………………………….[2] (c) The apples and lemons in Lily’s fridge still looked fresh even though they were bought at the same time. Suggest two reasons why. 1. ………………………………………………………………………………………………… RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP 2. ………………………………………………………………………………………………..[2] 3. Mia plays her flute. The oscilloscope shows the sounds the flute makes. Here is the an oscilloscope picture. (a) There are two complete waves in the picture. This wave has a friquency of 2 units. The frequency of the wave increases to 6 units. The amplitude stays the same. RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP (i) What is the number of complete waves that are now seen in the oscillposcoppe picture? ……….…………………………………………………………………………………………… ……………………………………………………………………………………………………[1] (ii) What happens to the height of the waves on the oscilloscope picture? ……….…………………………………………………………………………………………… ……………………………………………………………………………………………………[1] (b) Mia moves further away from the microphone. She plays the flute in exactly the same way. Explain what happens to the ocsillioscope picture. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………[2] (c) Youssaf looks at four traces on an oscillioscope. Which sound has the highest amplitude and highest frequency? Letter…………………………………………………………………………………………….[1] 4. The properties of sound can be explained using a diagram. RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP (a) What do the dots represent? [1] Circle the correct answer. Air particles Heat particles Solid particles Light particles Sound particles (b) Complete the sentences. The particles in the diagram move. Area A is called a compression because the particles are ……………………………………………………………………………………………………. …………………………………………………………………………………………………….. Area B is called a rarefaction because the particles are ………………………………………………………………………………………………….. ……………………………………………………………………………………………………[2] . (c) Yuri draws a picture to show the air particle in front of loudspeaker. RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP [2] Write the letter C on the diagram where there is a compression of air particles. ………………………………………………………………………………………………………….. ………………………………………………………………………………………………………….. Write the letter R on the diagram where there is a rarefaction of the air particles. ………………………………………………………………………………………………………….. ………………………………………………………………………………………………………….. RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP ALTERNATE TO PRACTICALS 1. 10M Safia uses a microphone to look at cells. She makes a labelled drawing of a cel (a) Name the structure labelled …………………………………………………………………………………………………… ………………………………………………………………………………………………. [1] (b) Safia cannot be sure whether the cell is animal and plant. Use the information from thediagram to explain why. …………………………………………………………….……………………………………… ……………………………………………………………….………………………………….[2] RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP 2 Plants and animals contain cells. Complete the table. [2] Put tick mark if the structure is prensent. The first one has been done for you. Structure Plant cell Nucleus Cell wall Cytoplasm Cell membrane Vacuole 3. Safia plays her flute. The oscillscope shows the sounds the flute makes. Safia plays six different notes on her flute. RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP Animal cell Here are six oscilloscope pictures. (a) which sound is the loudest? [1] Circlr the the correct answer. A B C D E F (b) Which sound has the greatest amplitude? [1] Circle the the correct answer. A B C D E F (c) Which sound has the highest pitch? [1] Circle the the correct answer. A B C D E F (d) Which sound has the highest frequency? [1] Circle the the correct answer. A B C D RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP E F (e) Tick the correct sentence about the pitch of sound. A high pitch sound is always loud. A high pitch sound is always has a high frequency. A high pitch sound is always has a large amplitude. A high pitch sound is always has a low frrquency. A high pitch sound is always has a large wavelength. RFIS/2022-23/CAMBRIDGE/GRADE 6IG/SCIENCE /PERIODIC TEST – 3_QP [1]
