🌞 Plant Power
What is photosynthesis?
a. The release of water from leaves
b. The process of making food using light
c. The movement of water in plants
d. The breakdown of glucose
b. The process of making food using light ✅
Why is sunlight important in photosynthesis?
a. It helps the plant to breathe
b. It gives color to the leaves
c. It provides energy to make food
d. It opens the stomata
c. It provides energy to make food ✅
What gas do plants release during photosynthesis that animals use?
a. Nitrogen
b. Carbon dioxide
c. Oxygen
d. Hydrogen
c. Oxygen ✅
Which part supports the leaf and carries water?
a. Chloroplast
b. Veins
c. Guard cells
d. Upper epidermis
b. Veins ✅
Which cells are packed with chloroplasts for photosynthesis?
a. Guard cells
b. Spongy mesophyll
c. Palisade mesophyll
d. Upper epidermis
c. Palisade mesophyll ✅
The main food made during photosynthesis is _______.
Glucose
_______ provides the energy needed to convert water and carbon dioxide into glucose.
Sunlight
Photosynthesis provides _______ for animals to breathe.
Oxygen
The _______ holds the leaf to the stem.
Petiole
_______ control the opening and closing of the stomata.
Guard cells
Photosynthesis takes place mainly in the roots of the plant.
❌ False
Reason: Photosynthesis occurs in the chloroplasts of leaf cells, not in the roots.
Sunlight provides the energy required for photosynthesis.
✅ True
Reason: Light energy is needed to convert carbon dioxide and water into glucose.
The oxygen released by photosynthesis is used by plants only.
❌ False
Reason: The oxygen is released into the atmosphere and used by animals and humans too.
The midrib of the leaf helps in absorbing sunlight.
❌ False
Reason: The midrib supports the leaf and helps in transport, but doesn’t absorb light.
Palisade mesophyll cells are located near the upper surface of the leaf.
✅ True
Reason: They are close to the surface to absorb the most sunlight.
What two raw materials are needed by the plant to make glucose?
Carbon dioxide and water
Why is sunlight necessary for photosynthesis?
It provides the energy needed to convert carbon dioxide and water into glucose
How does photosynthesis help reduce the effects of global warming?
By removing excess carbon dioxide from the air
Why is the leaf thin and flat in structure?
To increase surface area for maximum light absorption
What is the function of the waxy cuticle on the leaf’s surface?
To reduce water loss while allowing light to pass through
"I’m the reason leaves are called food factories. I combine carbon dioxide, water, and sunlight to make sugar. What process am I describing?"
Photosynthesis
"I rise through the roots, traveling in narrow tubes until I reach the leaf, where I join the sunlight and carbon dioxide. What am I?"
Water
"I’m the breath of life from green leaves, helping animals survive every single second. What gas do I provide?"
Oxygen
"I’m not just here to hold you—I raise you into the sunlight like a proud flag. What part of the leaf am I?"
Petiole
"I let gases move freely, creating space between my cells so carbon dioxide and oxygen can slip by. Who am I?"
Spongy mesophyll cell