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Sci 4_ Revision

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  • What is the Earth's outermost layer called?
    Core
    Magma
    Mantle
    Crust
  • A camel stores fat in its hump. What is this adaptation for?
    Fighting predators
    Surviving with less water
    Running faster
    Jumping higher
  • Which layer of the Earth is the thickest?
    Mantle
    Core
    Crust
  • 46. Why shouldn’t we touch electrical outlets with wet hands?
    It dries out our skin
    It wastes water
    Water can conduct electricity and cause shocks
    Electricity doesn’t work when wet
  • 68. You are outside at noon. What does your shadow look like?
    Very short
    Not visible
    Very long
    Very dark
  • 12. Which direction does light travel?
    In straight lines
    Backwards
    In circles
    In zig-zags
  • What forms when magma reaches the surface?
    Wind
    Lava
    A mountain
    A valley
  • 18. When are shadows the longest?
    At noon
    Early morning or late afternoon
    Under water
    At night
  • Which part of the Earth is the hottest?
    Crust
    Mantle
    Inner core
    Atmosphere
  • Why can’t you see your reflection on a towel?
    There is no light
    Because the surface is rough
    The towel is soft
    The towel is too colorful
  • Why should electrical wires be covered?
    To make them shorter
    To look colorful
    To keep them warm
    To prevent shocks
  • Which adaptation helps birds fly?
    Long necks
    Sharp teeth
    Heavy legs
    Hollow bones
  • How did people look at themselves before mirrors existed?
    Drawing their reflection in the sand
    Using polished metals
    Looking at their shadows
    Using water surfaces
  • 31. Which of these materials is a good conductor of electricity?
    Plastic
    Rubber
    Copper
    Wood
  • 57. Why do some animals hibernate during winter?
    To save energy when food is scarce
    To make friends
    To look cute
    To avoid swimming
  • Why do animals in cold regions have small ears?
    To reduce heat loss
    To fly better
    To hear better
    To look cute
  • 17. How does the Sun affect the length of shadows?
    Sun removes shadows
    Shadows change size depending on the Sun's position
    Sunlight makes shadows disappear
    Shadows stay the same
  • What happens during an earthquake?
    The ground shakes
    Rain falls heavily
    A volcano erupts
    Clouds form
  • 32. Which material is a good insulator?
    Steel
    Aluminum
    Plastic
    Copper
  • 36. Why is rubber used to cover wires?
    Because it melts easily
    Because it is an insulator
    Because it's heavy
    Because it's shiny
  • 61. You are in a dark room. Why can’t you see anything?
    The sound is too loud
    There is no light source
    Your eyes are closed
    The air is too dark
  • You’re making a switch with cardboard. Why won’t it work?
    It’s too thin
    It’s too soft
    It’s too shiny
    Cardboard is an insulator
  • How does camouflage help animals survive?
    Makes them faster
    Hides them from predators
    Keeps them warm
    Helps them fly
  • Why are wires in appliances not left uncovered?
    To make them longer
    To prevent electric shocks
    To make them light up
    To keep them shiny
  • 55. Why might fish in deep water have large eyes?
    To scare predators
    To swim faster
    To hunt during the day
    To see in low light
  • The Earth's core is mostly made of:
    Rocks and soil
    Iron and nickel
    Sand and clay
    Water and air
  • 26. What kind of materials allow light to pass through easily?
    Metallic materials
    Reflective materials
    Transparent materials
    Opaque materials
  • 22. Why can we see the Moon?
    It glows with fire
    It reflects sunlight
    It produces light
    It burns like the Sun
  • 25. What kind of surface would create a clear reflection?
    Transparent and bumpy
    Smooth and shiny
    Soft and dull
    Sticky and rough
  • 51. A volcano is about to erupt. What should people nearby do?
    Swim in lava
    Evacuate the area quickly
    Go sightseeing
    Take photos
  • How do chameleons protect themselves?
    By making loud sounds
    By growing spike
    By changing their color to blend into surroundings
    By running fast
  • Light travels in a:
    zigzag pattern
    straight line
    circular path
    random directions
  • 50. Why is it important to dry your hands before using electrical appliances?
    To avoid electric shock
    To protect the appliance
    To clean your hands
    To make it faster
  • What is magma?
    Molten rock under Earth’s surface
    Frozen water underground
    A plant type
    A kind of soil
  • You see a shadow grow longer in the afternoon. Why?
    The weather is hotter
    The ground is higher
    The Sun is lower in the sky
    It is getting darker
  • 24. When does the Sun appear highest in the sky?
    At midnight
    At sunrise
    At noon
    At sunset
  • Which of these is a behavioral adaptation?
    Camouflage skin
    Sharp teeth
    Thick fur
    Bird migration
  • 38. Which part of an electric plug is made of metal?
    The outer cover
    The prongs
    The handle
  • 30. Why are stars only visible at night?
    The Sun is blocking them
    The stars are asleep during the day
    The sky is darker
    They turn on at night
  • What happens when light is blocked by an object?
    The object becomes invisible
    A shadow is formed
    The light bends around it
    The object glows
  • 14. Which surface reflects the most light?
    Mirror
    Wood
    Paper
    Carpet
  • 28. Which material is opaque?
    Air
    Glass
    Clear plastic
    Wood
  • 33. What is the role of an insulator in a wire?
    To protect users from electric shock
    To help current flow faster
    To make it glow
    To heat up the wire
  • Which planet is closest to the Sun?
    Mars
    Earth
    Mercury
    Venus
  • Why do stars seem to move across the sky?
    Because stars are flying
    The Moon is pulling them
    They are blinking
    Because Earth is rotating
  • Why do some animals have thick fur?
    To fly higher
    To run faster
    To keep warm in cold climates
    To hide from predators
  • You’re asked to bring a conductor for an experiment. What will you bring?
    A metal fork
    A plastic spoon
    A wooden stick
    A rubber glove
  • What causes volcanoes to erupt?
    Erosion
    Sunlight
    Movement of tectonic plates
    Wind pressure
  • 59. Why do birds fly south in winter?
    To find food and warmer weather
    To race each other
    To play games
    To escape humans
  • 53. A polar bear lives in the Arctic. How is it adapted to this environment?
    It drinks lava
    It lives in trees
    It has thick fur and fat to stay warm
    It can fly away
  • Earthquakes happen when...
    Clouds hit mountains
    Volcanoes fall asleep
    Animals dig deep
    Tectonic plates suddenly move
  • Which part of Earth do we live on?
    The core
    The lava layer
    The crust
    The mantle
  • 20. Which of the following is NOT a source of light?
    Torch
    Sun
    Candle
    Moon
  • What is animal adaptation?
    A change that helps an animal survive in its environment
    A way animals travel faster
    A tool animals use to eat
    A place where animals sleep
  • 23. What causes day and night?
    Clouds blocking sunlight
    The rotation of the Earth
    The movement of the Moon
    The Sun turning off
  • Which of the following objects is opaque?
    A glass window
    A wooden door
    A magnifying glass
    A clear plastic sheet
  • What is camouflage?
    A method for animals to find food
    A type of animal sound
    A way animals move faster
    A way animals blend into their surroundings
  • 45. Which part of a wire allows electricity to flow?
    The plastic covering
    The label
    The insulation
    The metal inside
  • 11. How do we see objects?
    Light reflects into our eyes
    We smell them
    They glow in the dark
    Sound helps us see
  • 95. Why is copper used inside wires?
    It glows in the dark
    It conducts electricity well
    It is soft and colorful
    It makes things cool
  • Why do some desert animals come out only at night?
    To fly
    To see better
    To find water
    To avoid the heat
  • How do animals in cold climates adapt?
    Bright colors
    Thick fur or blubber
    Thin skin
    No legs
  • 78. You spill water near an extension cord. What should you do?
    Touch it to test
    Pour more water
    Unplug it safely and clean the area
    Ignore it
  • A person uses a mirror to see behind them while driving. What property of light does this use?
    Refraction
    Blockage
    Absorption
    Reflection
  • 29. What happens to light when it hits a black object?
    It shines brighter
    It is absorbed
    It passes through
    It is reflected
  • The Moon appears bright at night because:
    It reflects sunlight
    It glow in the dark
    It produces its own light
    It absorbs sunlight
  • What is the bouncing back of light called?
    Transmission
    Reflection
    Refraction
    Absorption
  • Which planet has a very thick atmosphere and is the hottest?
    Venus
    Saturn
    Mars
    Mercury
  • What helps a cactus survive in the desert?
    It has large flowers
    It has big fruits
    It grows tall fast
    It stores water in its stem
  • 47. Which of these is an example of using an insulator for safety?
    Batteries in remote
    Metal on plug tips
    Plastic on plugs
    Switches turning off
  • You shine a torch at a glass of water. What happens?
    Light passes through
    Light stops completely
    Water turns black
    A shadow forms
  • 40. In which of these places is it most dangerous to use electrical appliances?
    In a dry room
    On a carpet
    Near a full bathtub
    Next to a wooden table
  • 44. Which material would be safest for a handle of a cooking pot?
    Iron
    Wood
    Copper
    Aluminum
  • What would happen if Earth stopped rotating?
    Animals would stop moving
    The Earth would shrink
    Oceans would freeze
    There would be no day and night
  • 41. What does a switch do in an electric circuit?
    It makes the circuit louder
    It makes the wires longer
    It stores energy
    It opens or closes the circuit
  • 43. What does a closed circuit mean?
    Electricity can flow through it
    No current can pass
    The circuit is broken
    It’s only for batteries
  • 13. What do mirrors do to light?
    Block it
    Absorb it
    Reflect it
    Bend it
  • What do we call the path a planet follows around the Sun?
    Axis
    Moon
    Orbit
    Asteroid
  • 16. What causes shadows?
    Earth shaking
    Wind blowing
    Sound bouncing
    Light being blocked
  • Which part of Earth is the hottest?
    The crust
    The ocean floor
    The core
    The clouds
  • You notice your shadow changes size during the day. Why?
    You are moving faster
    The wind moves it
    Because the Sun’s position changes
    Your body is growing
  • Which of these is a damage caused by an earthquake?
    Cloud formations
    Strong winds
    Heavy rainfall
    Buildings collapsing
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