From cells to organ systems

Grade 9 Science Worksheet - Challenge Me

Circle the best answer.

1. Read this first

   Use this

   not to scale.

3. 1.

   Ren reads both maps. A muscle cell needs nutrients and oxygen. How many other systems must pass a supply into the circulatory system?

   • Zero: the circulatory system makes both supplies itself
   • One: the digestive system, which also supplies oxygen
   • One: the respiratory system, which also supplies nutrients
   • Two: the digestive and respiratory systems
4. 2.

   Tala reads both maps. A muscle cell gives off carbon dioxide that is later breathed out. Which route does it follow?

   Use the picture in question 1.

   • Muscle cells, then the circulatory system, then the respiratory system
   • Muscle cells, then the respiratory system, then the circulatory system
   • Muscle cells, then straight to the respiratory system, skipping the circulatory system
   • Muscle cells, then the digestive system, then the circulatory system
5. 3.

   Zee removes one arrow from the maps. Which removal leaves the muscle cells with no new oxygen supply in the model?

   Use the picture in question 1.

   • The arrow from the respiratory system to the circulatory system
   • The arrow from the digestive system to the circulatory system
   • The arrow from the circulatory system to the respiratory system
   • The arrow from the muscle cells to the circulatory system

6. Use this

   Map (model, not to scale): three boxes inside a leaf. The dermal tissue covers the leaf. The vascular tissue sends an arrow to the ground tissue, marked water. The ground tissue is where photosynthesis happens and uses water in this model.

7. 4.

   Bo reads a model of a leaf. In the model, the vascular tissue stops carrying water to the ground tissue. What follows, and why?

   • Nothing changes, because the tissues of a leaf work alone
   • The dermal tissue takes over, because it also covers the leaf
   • Photosynthesis speeds up, because less water means a lighter leaf
   • Photosynthesis slows, because the ground tissue gets less of the water it uses
8. 5.

   In the test, the respiratory system passes 80 units per minute. Esme's class reads a model card. In a test, the respiratory system passes 80 units of oxygen a minute. Which claim fits the card?

   • The cells together get the same 100 units a minute, because the cells make their own oxygen
   • The muscle cells alone get less, by 20 units a minute, because they use the most oxygen
   • The cells together get 20 units a minute more than they use, because the digestive system adds oxygen
   • The cells together get 20 units a minute less than they use, because the circulatory system delivers no more than it receives

9. Use this

   Notebook (textbook facts), 3 rows. Columns: line, what it says. 1, Epithelial tissue covers outer surfaces and lines tubes and hollow spaces. 2, Blood is a connective tissue, with cells in a fluid matrix called plasma. 3, Cardiac muscle forms the walls of the digestive tube.

10. 6.

    Jun reads a notebook of facts about tissue types. Which line has a flaw?

    • Line 1, because epithelial tissue does not line any tubes in the body
    • Line 2, because blood is not a tissue at all
    • No line, because the three lines match the facts
    • Line 3, because cardiac muscle is found only in the heart

11. Use this

    Notebook (textbook facts), 3 rows. Columns: line, what it says. 1, Organ systems exist only in animals, so a tree has none. 2, A leaf is an organ of the tree. 3, A tree is an organism made of many cells.

12. 7.

    Kira reads a notebook of facts about a tree. Which line has a flaw?

    • Line 3, because a single cell cannot be an organism
    • No line, because the three lines match the facts
    • Line 2, because a leaf is a tissue, not an organ
    • Line 1, because a tree has a shoot system and a root system

13. Use this

    Card (textbook facts), 3 rows. Columns: tissue in a leaf, its job. dermal tissue, covers the leaf and controls gas exchange. vascular tissue, carries water, minerals and sugars. ground tissue, is where photosynthesis happens.

14. 8.

    Milo reads a card about a leaf. Which level is the leaf, and why?

    • Organ system, because a leaf is a large, flat part of the plant
    • Organ, because several tissue types work together on photosynthesis and transport
    • Tissue, because a leaf is one layer of similar green cells
    • Cell, because a leaf is one green unit made by the plant

15. Use this

    Card (textbook facts), 3 rows. Columns: row, what it describes. X, the pine trees living in one forest. Y, the pines together with the flowering plants, insects and microbes of that forest. Z, the forest with its living things and its nonliving parts, such as rain water.

16. 9.

    Noah reads a card about a forest. Which choice names the levels of X, Y and Z, in that order?

    • Population, community, ecosystem
    • Community, population, ecosystem
    • Population, ecosystem, community
    • Organism, community, ecosystem

17. Card (model data)

    layer of structure H	tissue type
    inner layer	epithelial
    middle layer	epithelial
    outer layer	epithelial

18. 10.

    Pia reads a model card of structure H, a stack of layers. Which level is H, and why?

    • Tissue, because all its layers are the same tissue type
    • Organ system, because its layers make a large structure
    • Cell, because its layers share the same shape
    • Organ, because it has three layers working together