أوراق عمل الوحدة الأولى Final Revision العلوم المتكاملة الصف السابع

أوراق عمل الوحدة الأولى Final Revision العلوم المتكاملة الصف السابع

Lesson 1: Photosynthesis and Cellular Respiration

1.?What is the primary purpose of sunlight in the process of photosynthesis

a)To provide warmth to the plant
b)To help the plant absorb water
c)To provide energy for converting carbon dioxide and water into glucose
d)To protect the plant from predators

2.?Which organelle in plant cells where photosynthesis occurs
a)Nucleus
b)Mitochondria
c)Chloroplast
d)Ribosome

3.?Where in the leaf does most photosynthesis occur
a)Epidermal cells
b)Guard cells c)Mesophyll cells
d)Phloem cells

4.?What are the tiny openings on the bottom layer of leaves that allow gas exchange called
a)Stomata
b)Chloroplasts
c)Cuticles
d)Trichomes

5.?What gas do plants take in through their stomata for photosynthesis
a)Oxygen
b)Nitrogen
c)Carbon dioxide
d)Methane

6.?Which type of mesophyll cells are tightly packed and located near the top of the leaf
a)Spongy mesophyll cells
b)Palisade mesophyll cells
c)Epidermal cells
d)Guard cells

7.?What is the main product of photosynthesis that plants use for energy
a)Oxygen
b)Carbon dioxide
c)Water
d)Glucose

8.?How do spongy mesophyll cells facilitate the process of photosynthesis

a)By storing water
b)By protecting the leaf surface
c)By allowing gases to flow through open spaces d)By absorbing nutrients from the soil

9.? What is the role of the cuticle in a leaf
a)To absorb sunlight
b)To facilitate gas exchange
c)To reduce water loss
d)To produce glucose

:From the following two diagrams answer the following questions

1. ……………………………………… Structure 1 name is
2. ……………………………………… Structure 2 name is
3. ……………………………………… Structure 3 name is
4.  are near the top surface of the leaf. They are packed close together.………………………………..
5. ………………….. Epidermal cells can produce a waxy covering called the

11.Which of the following organisms also perform photosynthesis besides plants
a)Animals
b)Fungi
c)Algae and phytoplankton
d)Bacteria

12.?What is the role of chlorophyll in photosynthesis
a)It reflects light
b)It captures light energy
c)It stores glucose
d)It releases oxygen

13.? Which pigment in plants is responsible for absorbing light energy
a)Carotene
b)Anthocyanin
c)Chlorophyll
d)Xanthophyll

14.? What happens to water molecules during the first step of photosynthesis
a)They are stored in the vacuole
b)They are split apart to release oxygen
c)They combine with carbon dioxide
d)They are converted into glucose

15.? What is the main product of the second step of photosynthesis
a)Oxygen
b)Water
c)Sugars
d)Carbon dioxide

16.? What are the reactants in the photosynthesis chemical reaction
a)Glucose and oxygen
b)Carbon dioxide and water
c)Sunlight and oxygen
d)Glucose and water

True (T) or false (F)

1.[ ………………..] Epidermal cells are flat and regularly shaped
2.[ ………………..] The bottom epidermal layer of most leaves has small openings called stomata.

3. [ ………………..] Mesophyll cells contain chloroplasts, which are the organelles where photosynthesis occurs.

? What are the products of the photosynthesis chemical reaction
a)Water and oxygen
b)Carbon dioxide and glucose
c)Glucose and oxygen
d)Carbon dioxide and water

19.? What are the materials plants need to survive
A. carbon dioxide, oxygen, water, sunlight, and other nutrients
B. carbon dioxide, water, sunlight, and other nutrients
C. carbon dioxide, oxygen, water, and other nutrients
D. carbon dioxide, water, sunlight

19.Where are sugars stored in plants for later use?
a)In the stomata b)In the roots, such as in potatoes and carrots c)In the chloroplasts d)Guard cells
20.What is the main purpose of cellular respiration?
a)To produce glucose b)To convert energy in food molecules into ATP c)To release carbon dioxide d)To absorb oxygen
21.In which part of the cell does glycolysis occur?
a)Mitochondria b)Nucleus c)Cytoplasm d)Endoplasmic reticulum
22.What is the first step of cellular respiration A called?
a)Krebs cycle b)Electron transport chain c)Glycolysis d)Photosynthesis