The City School PAF Chapter

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1 The City School PAF Chapter Comprehensive Worksheet May 2015 SCIENCE Class 7 Candidate Name: Index Number: Section: Branch/Campus: Date: Maximum Marks: 100 Time Allowed: 2 hours 0minutes INSTRUCTIONS: Write your name, index number, section, branch/campus and date clearly in the space provided. Read and follow the instructions of the given questions. Answer all the questions in the space provided. Select only one answers when made to choose, otherwise no marks will be given. Check your answers before handing your paper in. Marks for each section are shown below. This paper consists of 10 printed pages including the cover page. For Examiner s use only Sections Section A Section B Total Question Max. Marks Marks Obtained Percentage Grade INVIGILATED BY MARKED BY MARKS TALLIED BY The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 1 of 10

2 SECTION A OBJECTIVE [50 MARKS] Q.1 Choose the best option and encircle it. [30 Marks] 1) Large central vacuole is present in a) Plant cell b) Animal cell c) Both animal and plant cells 2) The process of cell division starts with a) vacuole b) cytoplasm c) nucleus 3) Genes are present on the a) Cytoplasm b) chromosomes c) Chloroplast 4) The cell wall is made up of a) chromatin b) cellulose c) cytoplasm 5) This organ is the part of respiratory system a) nerves b) trachea c) heart 6) Red blood cells don t have nuclei so that a) they can survive b) create Immunity c) carry as much oxygen as possible 7) When same cells are grouped together the form a a) Nerve cell b) tissue c) organ 8) Which system transports blood around the body? a) Circulatory system b) Digestive System c) Respiratory System 9) The features of an organism are controlled by the a) vacuole b) cytoplasm c) nucleus 10) The light rays travel in a) form of waves b) form of rays c) form of rays and waves both 11) Reflection happens when light a) bounces back b) changes speed c) falls on an opaque object 12) Primary colours of light are a) blue, green, red b) red, blue, yellow c) green, red, yellow 13) Speed of light in vacuum is a) 300,000,000 km/s b) 300,000,000 m/s c) 300,000,000,000 m/s 14) Cyan colour of light is made by adding a) blue and green b) red and blue c) green and red 15) The sequence of colours seen through prism is a) VIBGYOR b) VIGBYOR c) VIBYOGR The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 2 of 10

3 16) Light year is the distance light travels in a) One year b) Two years c) Three years 17) The speed of light increases a) when it enters from lighter to denser medium b) when it enters from denser to lighter medium c) when it travels through vacuum only 18) Convex lens is also called as a) Converging lens b) Diverging lens c) Clear lens 19) The image produced by a concave mirror is a) Upright and virtual b) Clear image c) Magnified image 20) Dispersion of light was first observed by a) Newton b) Thomas Young c) Edison 21) When no more solute can be added it is a a) Saturated solution b) Unsaturated solution c) Dilute solution 22) Magnesium hydroxide is a) Acid b) Alkali c) Salt 23) Ant bites are a) Alkaline b) Acidic c) Neutral 24) Acids are a) Good electrical conductors b) Good conductors of heat c) Good metals 25) ph metre is better to be used as it is a) Accurate b) Handy c) Light in weight 26) Neutral solutions have ph a) More than 7 b) Less than 7 c) Only 7 27) Wasp sting can be neutralized by using a) Alkali b) Vinegar c) Water 28) Phenolphthalein gives this colour in alkali a) Pink b) Red c) Green 29) The main source for making indicators is a) Paper b) Water c) Plants 30) When dilute acids react with metals they produce this gas a) Helium b) Hydrogen c) carbondioxide The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 3 of 10

4 Q.2 Give scientific reasons for the following. [10 Marks] 1. A shadow of an object is formed. 2. Rainbow is seen in the sky after rain. 3. We see colours of light when.. 4. The cell membrane is permeable. 5. Burdock seeds have spikes. Q.3 Mention whether true and false. Write correct statement for the false one. [10 Marks] 1. Sperm cell is an animal cell. 2. A red book appears black in red light. 3. Producers are the animals that eat plant. 4. Omnivores eat only meet of other animals. 5. The human eye is an example of compound eye. 6. Retina is made up of three types of cells. 7. The part of microscope that controls the amount of light is called body tube. 8. Group of tissues working together are called organs. 9. Red filter absorbs all colours of light and transmits none. 10. Animals depend on plants for nutrition and seed dispersal. The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 4 of 10

5 Section.B SUBJECTIVE [50 Marks] Q.1 a) Reshma drew the following food web after studying a field. [ /6] Using only the information in the diagram, explain with reasons what will happen to: i. The number of butterflies, if more blackbirds are killed by foxes. ii. iii. The number of hawks, If more frogs are killed by a farmer s pesticide. The number of foxes, If the number of frogs increases. (b) Jane studied the following habitat. [ /3] She collected the following specimen, but forgot to record where she collected them from: a) Shade loving plant b) Low plant adapted to windy conditions c) Invertebrate that needs water with high levels of oxygen. For each speciman,state which habitat you think Jane collected it from. a b c The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 5 of 10

6 (c) Mountain hares have fur which turns from brown to white in the winter. Brown hares have brown fur all the time. Both mountain hares and brown hares live in the hills of Derbyshire. It only occasionally snows in Derbyshire. The mountains of Scotland are home to many more mountain hares than Derbyshire. Mountain hares eat heather which grows in mountainous areas. Brown hares mostly eat grass which grows on low hills. [ /4] a) What adaptation does the mountain hare have which helps it survive the winter? b) Why does this help it survive in mountainous areas? c) Explain why this adaptation does not help the mountain hare in Derbyshire. d) Give one reason why there are many more mountain hares in Scotland than in Derbyshire. Q.2 a) The following leaves are from different plants. Choose a leaf to match each description of an adaptation below. [ /3] Adaptations: i. Has a small surface area to avoid loss of water. ii. Has a large surface area to get as much sunlight as possible in a shady wood. iii. An evergreen plant which prevents its leaves from being eaten by animals. b) Write some features of the following animals which show how do they adapt to their habitat. [ /5] The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 6 of 10

7 Penguin Elephant Spider Fish Bird Q.3 a) What type of an image is formed by? [ /6] Concave mirror Convex mirror b) How does refraction of light takes place? Explain. [ /2] The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 7 of 10

8 Q.4 a) Complete the table below. [ /2] Some further examples: Object Colour of light Colour object seems to be Red Socks Blue teddy Green camel Magenta Book Red Blue Green Red Blue Green Red Blue Green Red Blue Green Red Black Black Black d) Complete the following table. [ /3] Cell Organelle Function Nucleus Chloroplast Cell membrane Cell wall Cytoplasm Vacuole The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 8 of 10

9 Q.4 a) Complete the following Venn diagram and mention the similar and different parts of an animal cell and a plant cell. [ /2] The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 9 of 10

10 b) Label the following six parts of the microscope. [ /6] c) Complete the following table. [ /5] Name Of System Organs of the system Function Nervous System Digestive System Blood Circulatory System Skeletal system Muscular system d) Write the functions of following. [ /3] a) Connective tissue _ b) Root hair cell _ c) Ground tissues _ The City School / PAF Chapter/ Comprehensive Worksheet/ May 2015/ Science / Class 7 Page 10 of 10