1) Sound DO NOT travel in ....... a) Air b) Water c) Vacuum d) Solid 2) Which of the following statements is TRUE? a) Sound can travel through space b) Sound travels through vacuum c) Sound need medium to travel d) Sound cannot travel in water 3) What is an echo? a) A type of sound wave b) The bending of sound around obstacles c) The reflection of sound from a surface d) A sound produced from vibration 4) What types of surface reflects sound the best? a) Rough and soft b) Smooth and hard c) Porous and thin d) Transparent and flexible 5) Which of the following animals use echolocation? a) Elephants and lions b) Bats and dolphins c) Frogs and snakes d) Cats and dogs 6) Why are walls in a music studio covered with soft materials? a) To increase sound reflection b) To reduce noise pollution c) To absorb sound and prevent echoes d) To make the room look attractive 7) Which layer of the earth is the thinnest? a) Crust b) Mantle c) Outer core d) Inner core 8) The earth's core is mostly made of ? a) Rock and ice b) Iron and nickel c) sand and water d) carbon and oxygen 9) The earth's crust is divide into a) Continents b) Mountains c) Plates d) Oceans 10) What is the innermost layer of the Earth called? a) Crust b) Mantle c) Outer core d) Inner Core 11) What is the main cause of earthquakes? a) Movement of tectonic plate b) Heavy rainfall c) Volcanic eruptions d) Sunspots 12) What are the three main types of valcanoes? a) Active , dormant, extinct b) Large, small, mediym c) lava, ash, magma d) tectonic, oceanic, continential 13) What causes tsunami? a) A volcanic eruption b) An underwater earthquake c) A stong hurricane d) High tides 14) The movement of tectonic plate is driven by a) Earth's magnetic field b) The sun's heat c) Convection currents in the mantle d) Ocean currents 15) A solar eclipse happens when a) Earth is between the sun and the moon b) The sun moves closer to earth c) the moon is between the sun and earth d) the moon moves behind earth 16) Why did we not see a solar eclipse every month? a) the moon's orbit is tilted b) the sun is too bright c) earth moves to fast d) the moon's shadow is too small 17) What should you never do during a solar eclipse? a) take a picture of it b) look at it directly without projection c) watch it using a pinhole projector d) read about it in a book 18) A lunar eclipse happens when a) the moon is between the sun and earth b) the sun is between earth and moon c) earth is between sun and moon d) moon moves closer to the sun 19) What are the two types of lunar eclipse a) partial and total b) solar and lunar c) penumbral and annular d) umbra and penumbra 20) Can we look at a lunar eclipse safely with our eyes? a) yes, it is safe b) no, it will damage our eyes c) only with telescope d) only with sunglasses

Chapter 6 Earth Physics

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