Science 3rd, unit 2
SCIENCE 3rd grade
UNIT 2
Teacher: J. C. Brazo
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
Do you remember?
LIVING THINGS
All you can see on Earth can be...
NON-LIVING THINGS
types
What's the difference?...
types
Animals Plants Fungi Microorganisms
YES!
El Tomillar, J. C. Brazo
Natural Artificial They are born They grow They reproduce They die
NO!
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Science 3rd, unit 2
NOW, LET'S LEARN MORE ABOUT...
LIVING THINGS
All you can see on Earth can be...
NON-LIVING THINGS
types
types
Animals Plants Fungi Microorganisms
Natural Artificial
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
REMEMBER: All living things... are born, they grow and die But there are some differences between LIVING THINGS
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
FLOWERS
PARTS OF A PLANT LEAVES
STEM ROOTS
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
FLOWERS
LEAVES
STEM
ROOTS - Part of the plant that holds it in the soil - Absorb water and minerals
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
FLOWERS
LEAVES
STEM
- Part of the plant that grows above the ground - Supports the other parts
ROOTS
- Carries water and minerals to the leaves - Also carries sugar from the leaves to rest of the plant
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
FLOWERS
LEAVES
- Absorb energy from the sun - Takes carbon dioxide from the air
STEM
- Combine them with water and minerals to make sugars for the plant
ROOTS
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
FLOWERS - Produce seeds for the plant to reproduce
LEAVES
STEM ROOTS
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
Scientists study different varieties of Science. Botanists are scientists too. They are plant experts.
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
PLANTS LEAVES shapes OVAL
HEART-SHAPED
El Tomillar, J. C. Brazo
ROUNDED
SHARP
FLAT and LONG
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Science 3rd, unit 2
PHOTOSYNTHESIS The process by which
green plants produce the sugars they need to live
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
PLANTS NUTRITION PROCESS
Step 1: Water and mineral salt are absorbed from the soil through the roots XYLEM SAP is created
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
PLANTS NUTRITION PROCESS
Step 2: The xylem sap moves up the stem and branches and reaches the leaves
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
PLANTS NUTRITION PROCESS
Step 3: The xylem sap mixes with carbon dioxide and sunlight in the leaves xylem sap turns into PHLOEM SAP
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
AIR is made up of a mixture of gases PLANTS LEAVES RELEASE THIS
PLANTS LEAVES ABSORB THIS
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
PLANTS NUTRITION PROCESS
(phloem sap) R E S U M E
Su n
Xylem sap, sunlight and air form food (sugar) for the plant
(phloem sap) Nutrients move al around the plant
It reaches the LEAVES
(xylem sap) Roots absorb WATER and MINERALS Mineral salts
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
CHOROPHYLL helps the plant make it own food. It's green, so it gives plants their green color.
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
PLANTS REPRODUCTION PROCESS most plants produce seeds SOME PLANTS USE FLOWERS
DO NOT USE FLOWERS
to produce seeds
to produce seeds
ANGIOSPERMS
GYMNOSPERMS
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
Acorns grow from seeds in the holm oak
HOLM OAKS LIFE CYCLE
After some years, the seedling grows into a tree
El Tomillar, J. C. Brazo
Acorns fall down and skirrels bury them into the soil
In spring, new seedlings begin to grow
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Science 3rd, unit 2
THE BENEFITS OF TREES absorb CARBON DIOXIDE produce OXYGEN their roots reduce effects from FLOODS and LANDSLIDES their leaves MODERATE TEMPERATURE they are the HOME for MANY ANIMALS
El Tomillar, J. C. Brazo
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Science 3rd, unit 2
SOME SIMPLE ACTIONS TO PRESERVE FORESTS...
Respect plants and animals when you go to the forest
Do not burn fires
El Tomillar, J. C. Brazo
Do not cut down trees
Paper comes from wood. Do not waste it and reccyle
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