Pakistan Excel English School Revision sheet Subject: Science Name: _________________ Grade 6 Section: ____ Q2-Look at the food chain below and answer the questions: 1-Draw the arrows.Write below if they are a producer, predator or prey? _______________,______________,____________,_____________ 2-What do the arrow show? …………………………………………………………………………………………………… Q3-Look at the diagrams and answer the questions: Which choice correctly explains the path of energy through the food chain? a) Wolf……..>plant………>deer b) Plant………..>rabbit……….>deer c) Plant…………>rabbit…………>cougar d) Cougar…………>rabbit…………>wolf Q4-Look at this food web then answer questions: 1) List two producers in the food web. ………………………………………. …………………………………. 2) List two predators and two preys in the food web. ………………………………………. …………………………………… 3) Draw a food chain that is a part of this food web. Q.5 Ahmed writes about a food chain. Algae get their energy from the Sun The algae are eaten by a fish. The fish is eaten by a squid. The squid is eaten by a shark. a) Put the organisms in the correct order in food chain diagram. b) What habitat is this food chain found in? ………………………………………………………………………………………………….. c) Algae are the …………………………………… in this food chain . (complete the sentence) Q.6 Here is a forest habitat. Q8-Look at the picture below and answer the questions; a) Which gases causes acid rains? …………………………………………………………………………………………………. b) Where does Sulfur dioxide come from? ………………………………………………………………………………………………….. c) Why acid rain is a problem? ……………………………………………………………………………………………………. d) What happens when acidic rain falls on the buildings and statues? …………………………………………………………………………………………………….. Q.9 What is the ultimate Source of energy in a food chain? Complete the sentences about the food chains. Q.10 a) Complete the spider diagram to show the causes of deforestation. b) Write the negative effects of deforestation. d) What is Global Warming? ………………………………………………………………………………………….. e) Which gas is responsible for global warming? ……………………………………………………………………………………………… f) Which gases are responsible for Air pollution? ……………………………………………………………………………………………. g) How these gases are formed? …………………………………………………………………………………………….. Q.11 1) Look at the picture below and write two items that can be a) Recycled ………………………………………………. ………………………………………………… b) Reused ………………………………………………… ………………………………………………… 2) Choose the correct answer. 1 ) Another way of reducing the amount of waste is by------ a) ends up in the oceans. b) collecting waste c) burning waste d) recycling 2) What is to recycle? a) To transform things into materials for new things b) to use something more than once c) use and produce less things 3) What is to reduce? a) To transform things into materials for new things b) to use something more than once c) to use and produce less things 4) What is to reuse? a) To transform things into materials for new things b) to use something more than once c) to use and produce less things 5) I always turn off the lights of the room when I don't need them, it means I ………………………………. a) recycle b) reuse c) reduce Q.12 Look at the picture below and answer: a) Which force slows down or stops the cycle? …………………………………………………………………….. b) Is the force useful or a problem in this picture? ………………………………………………………………… c) Why racing cars have streamlined shape? …………………………………………………………………………….. d) Write the name of the object shown in the picture. ………………………………………………………………………….. e) What does it do? …………………………………………………………………………….. f) Can we use any other thing to get the same function? ( Write name) ………………………………………………………………………………………… Q.13 Write the type of force acting in each of these pictures. …………………………………………. ………………………………………………… ……………………………………………………. ……………………………………………….. Q.14 Amina and Ali measured how far a block of wood slid down on a plank covered with different materials. Here are their results. a) Which surface produced the most friction? ………………………………………………………………………………………………… b) How do you know this? ………………………………………………………………………………………………… c) Why did this surface produce the most friction? …………………………………………………………………………………………………. Draw a bar graph to show the distance covered on each surface. Q.15 1) Cars have different forces acting upon them. This car is moving in the direction of arrow X. a) Which letter shows the Weight of the car? Circle the correct answer. X Y Z W b) Which letter shows the air resistance? Circle the correct answer. X Y Z W 2) A paraglider jumps in a parachute. Which force is responsible to paragliders to reach on ground safely? (Draw the arrow to show the direction of the force) ………………………………………………………………………………………….. Q.16 Omer and Malek are making circuits using different objects. They want to separate conductors and insulators. They are using these objects one by one in the space given below and checking either bulb will glow or not. What will be their results? Write in the table given below. Object The bulb will light up yes/no Conductor/Insulator What do they understand about conductors and insulators. Conductor: ……………………………………………………………………………………………….. ………………………………………………………………………………………………… Insulator: ………………………………………………………………………………………………… ………………………………………………………………………………………………… Q.17 Pure water does not conduct electricity. What did they do to make bulb glow? ………………………………………………………………………………………………….. Q. 18 a) Draw a line to connect the type of electrical component to its symbol. Symbols b) Rida and Sadia want to make an electrical circuit. They have five 3V batteries. They want to make more circuits using the components one by one . Some electrical components are shown here. Which components they can choose to make a circuit .( their circuit should work properly) ……………………………………………………………………………………………… Q.19 Hassan and like are connecting a circuit . They want to check the current by changing the length of wire X . What will happen to the brightness of the bulb if they a) Increase the length? ............................... b) Decrease the length? ………………………………………………. c) Which instrument they will use to measure current? …………………………………………………………………………………………………….. Q.20 An electric circuit is made using wires, a cell and a bulb are connected in the following ways. In which case will the bulb light up? a) b) c) d) Q.20 What are they doing wrong? ………………………………………………………………………………………… ……………………………………………………………………………………………… Q.21 a) Draw circuit diagrams. b) Draw circuits. Q.22 Match the column. 1 Column A Ampere Column B A picture of a circuit using symbols. 2 Volt A device to connect two wires. 3 Multimeter The unit for measuring the strength of electricity 4 Series circuit The unit electric current is measured in 5 Circuit diagram A piece of equipment for measuring current, voltage and resistance 6 Resistance A device for connecting an electric wire or cable to an electric supply 7 Connectors 8 Plug A circuit where the electricity has one path to flow along The amount of restriction of flow of electricity Q.23 Complete the following .
