Unit 4: Plants

🌿🌾🌰🌴 Unit 4: Plants 🌱🌺🌵🍃

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0.) Let's remember plants' life processes!

Plants are also living things. Plants have three life processes: nutrition, interaction and reproduction.

Nutrition: plants make their own food. The process of making food is called: PHOTOSYNTHESIS

1. The leaves absorb sunlight and carbon dioxide from the air.

2. Roots absorb minerals and water from the soil.

3. Water and minerals pass through the stem to the leaves.

4. The plant uses the sunlight, the carbon dioxide, the water and the minerals to make food.

5. When plants make food, they make oxygen too and release it to the air. This is good because humans and animals need oxygen to breathe.

Interaction: plants can’t move around. But they can react to their environment by moving their parts. For example:

Reproduction: it is the process by which living things create new living things. Plants also reproduce. Seeds can create a new plant.

1.) What do the parts of a plant do?

Game: http://www.softschools.com/science/plants/plant_parts/

2.) What are seed-producing plants?

There are 2 types:

• Angiosperms: produce flowers, fruit and seeds.
  

• Gymnosperms: produce cones and seeds.
  

3.) How do flowering plants reproduce?

• Stamen: produce pollen.
  

• Pistil: contains the ovary, the ovary transform into a fruit.
  

• Ovary: contains ovules, the ovules transform into seeds.
  

• Petals: colourful to attract insects.
  

• Sepals: small and green. They protect the flower.
  

4.) The life cycle of a flowering plant.

1. Seeds germinate.

2. The plant grows into a tree.

3. The wind, insects or animals transport pollen from the stamen to the pistil.

4. Pollen travels to the ovary and fertilises the ovules. The ovules become seeds and ovary a fruit.

5. Fruit falls into the ground and a new plant grows out of the seeds.

5.) Do all plants produce seeds?

The answer is NOOOOO!!!! Two types of plants do not produce flowers or fruits with seeds:

• Mosses are very small. They grow on rocks, tree trunks or on the ground. They live in moist places. The produce tiny spores in capsules.
  

• Ferns have very big leaves called fronds. They produce spores under the leaves. They live in shady and moist places like forests.
  

6.) Other interesting videos about plants!!!

And remember that other types of plants are: