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Worksheet in Botany (Photosynthesis) Photosynthesis: Making Energy Chloroplasts

Arellano University
Worksheet in Botany (Photosynthesis) Photosynthesis: Making Energy Chloroplasts
Photosynthesis is a process in which sunlight energy is used to make
glucose. The site of photosynthesis is in the chloroplast – an organelle
found in the leaves of green plants. The main functions of chloroplasts are
to produce food (glucose) during photosynthesis, and to store food
energy. Chloroplasts contain the pigment, chlorophyll. Chlorophyll absorbs
most of the colors in the color spectrum, and reflects only green and
yellow wavelengths of light. This is why we see leaves as green or yellow –
because these colors are reflected into our eyes.
1. What is photosynthesis? ______________________________________________________
_________________________________________________________________________
2. Where does photosynthesis occur? ______________________________________________
3. What are chloroplasts and where are they found? ___________________________________
_________________________________________________________________________
4. What are the two main functions of chloroplasts? ___________________________________
5. Why doe most leaves appear green? _____________________________________________
6. What is the primary pigment found in the chloroplast? ________________________________
Photosynthesis
Glucose is another name for sugar. The molecular formula for glucose
C6. Plants make sugar by
6His
12O
using the energy from sunlight to transform 2CO
from the air with water from the ground into glucose.
This process, called photosynthesis occurs in the chloroplast of the plant cell. During this process,
oxygen (O2) is created as a waste product and is released into the air for us to breath. The formula for
photosynthesis is:
(reactants) (products) CO2 + H2O + sunlight —->6C
H12O6 + O2
This formula says that carbon dioxide + water molecules are combined with the energy from sunlight to
produce sugar and oxygen. The reactants in photosynthesis (what is used) are
CO and sun. The
2, water
plant gets water from the ground through its roots. The plant collects carbon dioxide from the air. Much
of the carbon dioxide comes from living organisms that exhale (breath it out) it, but some also comes
from factory smokestacks and car fumes. 7. What is the formula for photosynthesis? __________________________________________
8. What three things are used to make glucose in photosynthesis? _________________________
_________________________________________________________________________
9. Where does the water come from? ______________________________________________
10.Where does the water enter the plant? ___________________________________________
11.Name 3 some sources of CO
2. _________________________________________________
12.What type of energy does the plant use to convert 2CO
and H2O into sugar? ________________ The products are glucose and oxygen. The glucose produced is used by the plant for energy and growt
We also use this glucose by eating plants. The oxygen produced is released into the air for us to breath.
Photosynthesis is essential for all life on earth, because it provides food and oxygen. Plants are
considered autotrophs because unlike us humans, they can make their own food using this process.
13.What is produced in photosynthesis? _____________________________________________
14.What is the glucose used for? __________________________________________________
15.What is the oxygen used for? __________________________________________________ 16.Here are three different ways to visualize the photosynthesis reaction: Is it easier for
you to understand the reaction by using pictures, words, or symbols (see above)? Why?
_____________________________________________________________________
_____________________________________________________________________
Photosynthesis in pictures Photosynthesis in words Photosynthesis in symbols Carbon dioxide and
water combine with
sunlight to create
oxygen and glucose. light CO + H2O ? C6H12O6 + O2 Essential Question: Describe, using scientific terms, how plants turn sunlight into energy sure to refer to the chemical equation to photosynthesis and discus the reactants and pro
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________

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