Study

PBL 5 Review

  •   0%
  •  0     0     0

      Back   Restart
  • What happens when the Moon passes into Earth’s shadow?
    Lunar eclipse
  • What is the solid that dissolves in a solution?
    Solute
  • Which sphere do birds fly in?
    Atmosphere
  • What does the Moon do during a lunar eclipse?
    Goes behind the Earth
  • What two spheres interact when a forest burns?
    Biosphere and atmosphere
  • You add more sugar to yeast. The gas increases. What is the independent variable?
    The amount of sugar
  • What variable should stay the same in an experiment?
    Control variable
  • Why does yeast need sugar?
    For energy/food to grow
  • Why do we use a control variable in science?
    To keep the test fair
  • What sphere has rivers, rain, and oceans?
    Hydrosphere
  • What happens when yeast is in cold water?
    It works slowly or not at all
  • Which one is a dependent variable? A. Type of plant B. Height of plant
    B. Height of plant
  • What do the stars in Orion form?
    A constellation
  • What sphere includes rain and snow?
    Hydrosphere
  • Which one is a chemical reaction? A. Cutting paper B. Yeast + sugar + warm water
    B
  • What makes yeast create gas bubbles faster?
    Warm water and sugar
  • What sphere is affected when pollution goes into a river?
    Hydrosphere
  • You add yeast to sugar water and it makes foam. What does that show?
    Gas is being made (a reaction is happening)
  • In your experiment, you changed water temperature. Yeast made more gas. What variable is that?
    Independent = water temp, Dependent = gas produced
  • If we cut trees in a forest, how does that affect the spheres?
    Biosphere (trees/animals), geosphere (soil erosion), atmosphere (less oxygen), hydrosphere (water cycle)
  • If you mix oil and water, is it a solution?
    No
  • What sphere is affected when animals die from pollution?
    Biosphere
  • Which one is NOT a sphere? A. Atmosphere B. Biosphere C. Technosphere
    C. Technosphere
  • Name one thing that shows a chemical change happened.
    Gas bubbles, colour change, or new smell
  • What does a constellation look like?
    Animal or object made of stars
  • What is another word for something that can mix evenly in water?
    Soluble
  • True or False: A lunar eclipse happens when the Moon blocks the Sun.
    False
  • What do molecules do when heated?
    Move faster
  • How do the geosphere and hydrosphere interact during a flood?
    A: Water from rivers (hydrosphere) changes the land (geosphere)
  • What happens when you mix sugar and water?
    The sugar dissolves
  • What kind of mixture is salt water?
    Solution
  • What does the shape of a crescent Moon mean?
    Only part of the Moon is lit by the Sun
  • Why can’t we always see constellations?
    Earth rotates or there is light pollution/clouds
  • If you see gas bubbles in yeast water, what does that show?
    A chemical reaction is happening
  • Name the solute and solvent in lemonade.
    Solute = sugar/lemon juice, Solvent = water
  • What shape is Earth’s shadow during a lunar eclipse?
    Circle
  • What do stars in constellations have in common?
    They look close from Earth but are far apart
  • What gas is made by yeast in sugar water?
    Carbon dioxide
  • What is it called when something disappears in water?
    Dissolve
  • What sphere has trees, animals, and humans?
    Biosphere
  • What sphere are fish part of?
    Biosphere or hydrosphere
  • What is one way constellations helped ancient people?
    Farming calendars or travel
  • Why is saltwater a solution but sand and water is not?
    Salt dissolves; sand does not
  • True or False: The Earth has only one sphere.
    False
  • What is the liquid that dissolves the solute?
    Solvent
  • What are clouds made of?
    Water (hydrosphere) in the air (atmosphere)
  • What happens if you change two variables in an experiment?
    You won’t know what caused the change
  • In an experiment, what do we change on purpose?
    Independent variable
  • Which one dissolves faster: sugar cube or sugar powder?
    Sugar powder
  • How can you test if something dissolved?
    Check if you can still see it or if it disappeared in the liquid
  • What happens when sugar is added to warm water with yeast?
    It makes bubbles (gas)
  • Why does warm water help yeast grow faster?
    Molecules move faster and help yeast work better
  • Which one is a constellation? A. Milky Way B. Orion C. Mars
    B. Orion
  • Why do some mixtures separate while others don’t?
    Because some dissolve (solution), others do not (just mix)
  • Explain the difference between solute, solvent, and solution using sweet tea.
    A: Solute = sugar, Solvent = tea/water, Solution = sweet tea
  • What is the solute in saltwater?
    Salt
  • What do you call water with salt dissolved in it?
    A solution
  • Why do constellations help sailors?
    They help with directions/navigation
  • What do we measure or observe?
    Dependent variable
  • In an experiment, why do we only change one variable?
    To see a fair result
  • You test different water temps and see how much gas yeast makes. What is the dependent variable?
    Amount of gas made
  • True or False: A molecule is bigger than an atom.
    True
  • If you dissolve sugar in tea, what is the tea?
    Solvent
  • Describe one example of a human affecting all four spheres.
    Building a city (changes geosphere), pollutes air (atmosphere), affects animals (biosphere), uses water (hydrosphere)
  • Which is a liquid? A. Oxygen B. Ice C. Water
    C. Water
  • What sphere includes air and clouds?
    Atmosphere
  • True or False: A mixture always looks the same.
    False
  • How can a change in the atmosphere affect the biosphere?
    Pollution can harm plants and animals
  • Explain how all four spheres interact during a volcanic eruption.
    Geosphere (erupts), atmosphere (smoke/gas), biosphere (plants/animals affected), hydrosphere (rain or water can mix with ash)
  • What gas do yeast make during fermentation?
    Carbon dioxide (CO₂)
  • What do we see during a solar eclipse?
    The Moon blocks the Sun
  • What do we call two or more substances that keep their shape?
    Mixture
  • What is a solar eclipse?
    The Moon blocks the Sun
  • Why do eclipses not happen every month?
    The orbits are tilted
  • What is yeast?
    A living fungus
  • What sphere is made of rocks, soil, and volcanoes?
    Geosphere
  • What is a group of stars in a pattern called?
    Constellation
  • If you boil saltwater, what happens?
    Water evaporates, salt stays
  • Why do we see a solar eclipse only in some places?
    The shadow is small on Earth
  • What is formed when two substances are mixed but not dissolved?
    Mixture
    • Your experience on this site will be improved by allowing cookies.