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Chapter 4 Key Terms
Mr. Mechaelsen's Science Class Chapter 4 Key Terms
17
Science
6th Grade
10/26/2011

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Term
Photosynthesis
Definition

When sunlight provides the energy for the food making process. 

 

How does photosynthesis work?

 

A plant uses carbon dioxide gas and water to make food and oxygen.

Term
Chloroplasts
Definition
The structures in plant cells in which food is made. 
Term
Vacuole
Definition
A large storage sac than can expand and shrink like a balloon.
Term
Cuticle
Definition
A waxy, waterproof layer that covers the leaves of most plants.
Term
Vascular Tissue
Definition
A system of tubelike structures inside a plant through which water, minerals, and food move.
Term
Fertilization
Definition
Occurs when a sperm cell unites with an egg cell.
Term
Zygote
Definition
A fertilized egg.
Term
Nonvascular plants
Definition
Plants that lack a well developed system of tubes for transporting water and other materials.
Term
Vascular Plants
Definition
Plants with true vascular tissue.  They are better suited to life in dry areas.
Term
Sporophyte
Definition
A stage in the life cycle of a plant where the plant produces spores, which are tiny cells that can grow into new organisms.
Term
Gametophyte
Definition
A life cycle of a plant where a spore develops into a new organism.  In the gametophyte stage, the plant produces two kinds of sex cells:  sperm cells and egg cells.
Term
Transmission
Definition
A process by which some objects such as glass and other transparent materials to allow light to pass through them.
Term
Reflection
Definition
The process when light hits a shiny surface such as a mirror and the light bounces back.
Term
Absorption
Definition
When dark objects take in light.
Term
Peat
Definition
A blackish brown material that is formed when mosses become compressed into layers.
Term
Fronds
Definition
The leaf of a fern plant.
Term
Rhizoids
Definition
Thin rootlike structures that anchor moss and absorb water and nutrients.
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