Generated with Monsha

Save this resource to edit, expand, or export it, or create more resources for free.

Photosynthesis Worksheet — 7th Grade Science (Diagram Labeling & Answer Key)

Smart Worksheet
Grade 7
English

Photosynthesis Worksheet — 7th Grade Science (Diagram Labeling & Answer Key)

Name: ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​      Date: ​​​​​​​​​​​​​​​​​​​​      Period: ​​​​​​​​​​​​


Activity 1: Plant & Leaf Diagram Labeling (Part 1)

Directions: Examine the diagram below illustrating how a green plant performs photosynthesis. Use the terms from the randomized word bank to correctly identify and label each numbered part (1–6). Write the correct term on the corresponding line provided below the diagram.
Word Bank:
Glucose  •  Sunlight  •  Water  •  Carbon dioxide  •  Chloroplast  •  Oxygen
Figure 1: Diagram of a plant leaf undergoing photosynthesis
Figure 1: Diagram of a plant leaf undergoing photosynthesis

Diagram Labels:
  1. Point 1: ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
  1. Point 2: ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
  1. Point 3: ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
  1. Point 4: ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
  1. Point 5: ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
  1. Point 6: ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​


Activity 2: Completing the Photosynthesis Word Equation (Part 2)

Directions: Photosynthesis is a biochemical reaction that converts solar energy into chemical energy stored in food. Use the terms from the same word bank above to complete the word equation below. Write the correct reactant (inputs) and product (outputs) terms on the blank lines.
Photosynthesis Word Equation:
​​​​​​​​​​​​​​​​​​​​  +  ​​​​​​​​​​​​​​​​​​​​  —(light energy)→  ​​​​​​​​​​​​​​​​​​​​  +  ​​​​​​​​​​​​​​​​​​​​
(Reactants / Starting Materials)                                                   (Products / Substances Produced)


Activity 3: Plant Structures & Pigments (Part 3 — Questions 1 & 2)

Directions: Answer the following questions in complete sentences, applying your knowledge of plant cell structures and processes.
  1. Why are leaves green? Identify the specialized cellular organelle and the specific pigment responsible, and explain how this pigment interacts with sunlight.

  1. What happens to the glucose produced during photosynthesis? Describe at least two ways the plant uses or stores this sugar molecule.



Activity 4: Ecosystem Connections & Scientific Reasoning (Part 3 — Questions 3 & 4)

Directions: Read each scenario carefully and write thorough, scientifically accurate responses based on photosynthesis concepts.
  1. Why does photosynthesis matter for animals and humans? Explain two distinct reasons why life on Earth depends on plants carrying out photosynthesis.

  1. Investigation Scenario: What would happen to a healthy green houseplant if it were placed inside a completely dark closet for several weeks? Explain the outcome and provide the scientific reasoning behind what happens to the plant's cells.



Activity 5: Synthesis Exit Ticket (Part 4)

Directions: Imagine you are explaining photosynthesis to a 3rd-grade student who has never heard the word before. Summarize the entire process clearly and simply in exactly two sentences so they can easily understand what plants do and why it matters.
Sentence 1 (What the plant takes in and makes):

Sentence 2 (Why this helps the plant and the living world):