What salty or fresh water does to plant and animal cells

Grade 9 Science Worksheet - Building Confidence

Circle the best answer.

1. 1.

   “model data, not to scale” Ari drew a cell in salt water. The teacher says the solution is hypertonic to the cell. Which statement explains why?

   • The cell has more solute than the solution has
   • The solution matches the cell, so water stops moving
   • The solution has more solute than the cell has
   • Water moves toward the cell, which has less solute
2. 2.

   Beaker drawing (model data, not to scale). Bo's cell sits in beaker W. Which name fits the solution, and why?

   • Hypertonic, because the cell has more solute than it has
   • Hypotonic, because water moves toward less solute
   • Isotonic, because no water moves in or out
   • Hypotonic, because it has less solute than the cell

3. Read this first

   Use this

   model data, not to scale.

4. 3.

   The solution in Esme's beaker is isotonic to the cell. What happens to the water?

   • Water moves toward the side with less solute
   • Equal amounts move in and out, so the size holds
   • Salt moves into the cell until the sides match
   • No water moves in or out of the cell
5. 4.

   Kira looks at three beakers. In which beaker does the solution have more solute than the cell?

   • Beaker Q, because 6% matches the cell
   • Beaker R, because 12% is more than 6%
   • Beaker P, because the cell has more solute than P
   • Beaker P, because water moves toward its smaller number
6. 5.

   Luz sets three beakers around the same kind of plant cell. Which beaker's solution is hypotonic to the cell?

   • Beaker Y, because water stops moving there
   • Beaker Z, because 10% is the largest number
   • Beaker X, because 0% is less than the cell's 3%
   • Beaker Z, because the cell's 3% is less than 10%
7. 6.

   Milo compares three labeled red blood cell diagrams. Which diagram shows a red blood cell in a hypotonic solution?

   • Diagram P, because water moved out of the cell
   • Diagram Q, because no water moved in or out
   • Diagram P, because it shows the smallest cell
   • Diagram R, because water moved into the cell
8. 7.

   Beaker drawing (model data, not to scale). In Pia's drawing the plant cell is firm with no gap inside its wall. What is this state called, and why?

   • Plasmolyzed, because water left toward less solute
   • Crenated, because the cell shrank with a crinkled edge
   • Lysed, because water entered and the cell burst open
   • Turgid, because water entered and the wall holds firm
9. 8.

   Ren wants the drawing where water left the cell. Which drawing shows that, and why?

   • Drawing X, because the stiff wall squeezes the water out
   • Drawing Y, because the 8% solution has more solute
   • Drawing X, because fresh water makes the cell burst
   • Drawing Y, because salt moves into the cell
10. 9.

    The teacher dissolved each shell in vinegar beforehand. Tala reads that a teacher's shell-less egg lost mass in one beaker. Which drawing shows that, and why?

    • Drawing Y, because water left the egg
    • Drawing X, because the egg took in sugar
    • Drawing Y, because the egg took in water
    • Drawing X, because water left the egg
11. 10.

    (model data, not to scale). Zee wants the drawing with no net movement of water. Which drawing shows that, and why?

    • Neither drawing, because water stops moving when sides are equal
    • Drawing Y, because most water moves toward less solute
    • Drawing Y, because the cell has more solute than the solution
    • Drawing X, because as many arrows go in as go out