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G7 SCIENCE - QUARTER 1

Quiz by NINJA RAILE

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40 questions
Show answers
  • Q1
    Why do scientists use models in science?
    To help students remember names of parts of the atom.
    To explain things that are too small or hard to observe.
    To show real objects exactly as they appear in real life.
    To decorate science books with fun pictures.
    30s
  • Q2
    Which of the following is an example of a scientific model?
    A colorful poster about famous scientists.
    A science quiz with questions about the solar system.
    A diagram showing the parts of an atom.
    A list of atom names written on the board.
    30s
  • Q3
    Why can we say orange juice is not a pure substance?
    Because its particles move faster than those in water.
    Because it contains different particles from water, sugar, and pulp.
    Because it is sweeter than pure water.
    Because it changes color when left in sunlight.
    30s
  • Q4
    How does the particle model explain why bubbles rise in orange juice?
    The gas particles in the bubbles are lighter and move upward.
    The liquid particles push the gas particles down, making them pop.
    The juice is alive and creates air from nothing.
    The juice particles stick together, forming bubbles at the top.
    30s
  • Q5
    What does the faster movement of particles in the hot soup tell us about temperature?
    Heating something adds more matter to the object.
    Higher temperature causes particles to move faster.
    Hotter things become heavier due to faster motion.
    Hot liquids have more particles than cold ones.
    30s
  • Q6
    What change happens to the spacing of particles when soup is heated?
    The number of particles stays the same but they melt.
    The particles shrink and move closer together.
    The particles move apart as they gain energy.
    The soup’s particles stop moving and stay still.
    30s
  • Q7
    Based on the particle diagrams, which one best represents a gas?
    Question Image
    The one with no particles shown at all.
    The one with particles far apart and moving rapidly.
    The one with particles close together and moving slowly.
    The one with particles arranged in a perfect pattern.
    30s
  • Q8
    If Diagram B shows particles that can move freely but stay close, what state of matter is it and why?
    Question Image
    It is a gas because the particles are almost touching.
    It is a liquid because the particles can slide past one another.
    It is a solid because the particles are still connected.
    It is energy because the particles are not touching.
    30s
  • Q9
    What property of solids can be explained by their particle diagram?
    Question Image
    Their particles roll around, so they can flow easily.
    Their particles break apart when the object is touched.
    Their heat causes particles to disappear in space.
    Their fixed shape is due to tightly packed, vibrating particles.
    30s
  • Q10
    Why did the water in the ice tray turn into ice after being placed in the freezer?
    The water particles lost energy and arranged tightly, forming a solid.
    The water particles mixed with air and changed state.
    The water particles moved faster and became a solid.
    The water became heavier and turned into a solid.
    30s
  • Q11
    After leaving the juice outside, Liza noticed the water disappeared. What process happened, and why?
    The liquid turned into vapor because the particles stopped moving.
    The water disappeared because the glass broke.
    The water turned into gas due to gravity pulling it up.
    The liquid turned into vapor because the particles gained energy.
    30s
  • Q12
    Why did droplets form on the underside of the lid during Liza’s experiment?
    Heat pushed water to the lid and made it stick.
    The lid created water from air by itself.
    Vapor lost heat, and the particles moved closer to form liquid.
    Water particles jumped up and stuck to the lid as ice.
    30s
  • Q13
    Liza claimed that water needs heat to become vapor. Her friend Anna said that water can change into vapor even without heat. Who is more correct, and why?
    Neither is right because vapor forms only when boiling.
    Anna is correct because water turns into vapor when it's cold.
    Liza is correct because energy must increase for particles to move apart and form vapor.
    Both are wrong because vapor is already inside water.
    30s
  • Q14
    How do the changes in energy during boiling and freezing support the idea that these are opposite processes?
    Boiling and freezing both happen at 100°C, so they are the same.
    Freezing removes energy and boiling adds energy, causing opposite particle changes.
    Boiling creates bubbles while freezing does not.
    Freezing and boiling are similar since both need water.
    30s
  • Q15
    Which of the following tools did the students use to measure how fast water drained?
    Question Image
    Magnet to see which soil has metal.
    Stopwatch to record the drainage time.
    Thermometer to check the soil temperature.
    Ruler to measure the bottle’s height.
    30s

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