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 solution matches the cell, so water stops moving
   • The solution has more solute than the cell has
   • The cell has more solute than the solution 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?

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

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?

   • Equal amounts move in and out, so the size holds
   • Water moves toward the side with less solute
   • No water moves in or out of the cell
   • Salt moves into the cell until the sides match
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 P, because water moves toward its smaller number
   • Beaker R, because 12% is more than 6%
   • Beaker P, because the cell has more solute than P
6. 5.

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

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

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

   • Diagram P, because it shows the smallest cell
   • Diagram Q, because no water moved in or out
   • Diagram P, because water moved out of the 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 Y, because salt moves into the cell
   • Drawing Y, because the 8% solution has more solute
   • Drawing X, because the stiff wall squeezes the water out
   • Drawing X, because fresh water makes the cell burst
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 X, because water left the egg
    • Drawing Y, because the egg took in water
    • Drawing Y, because water left the egg
    • Drawing X, because the egg took in sugar
11. 10.

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

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