Science » Unit A » Chapter 3 - Plant Growth and Adaptations
||Chapter 3 - Plant Growth and Adaptations
Unit A Chapter 3 Notes
carbon dioxide -
fibrous root -
Lesson 1: Life Support for Plants
· There is a big difference between plants and animals
· Plants make their own food
· Plants need carbon dioxide to make food
· Carbon dioxide is breathed out by animals
· Nutrients come from the ground brought by the roots
· Some of the water is taken in by the plant’s leaves but most of it is taken in by the roots.
· Photosynthesis is the process in which a plant makes food.
· Water and nutrients come in from the roots in the ground
· Carbon dioxide and sunlight are brought in through the leaves
· Light is trapped in the chlorophyll
· The light is energy that helps the plant turn carbon dioxide and water into sugar or food
· Oxygen is a waste product of photosynthesis and is let out of the leaf.
· Plants have adaptations
o Waterlilies have long stems that grow to the surface of the water
o at the surface, the leaf unrolls to collect carbon dioxide and sunlight
o Vines climb things to be able to reach the sunlight on top
o Cacti store water to use when there is no rain
o Their roots stay close to the surface of the ground to suck up the water as soon as it falls.
- What does air contain for plants?
- What is in soil that plants need?
- HOw is water taken in by plants?
- How is carbon dioxide taken in and oxygen given off by a plant?
- What traps energy from sunlight?
- How is water taken in and moved through a plant to its leaves?
- How do waterlilies capture sunlight?
- What adaptation do vines have?
- What adaptation do cacti have to collect rainwater?
- How are waterlilies and vines similar?
- How is the cactus stem adapted for dry climates?
Lesson 2: The Functions of Plant Parts
o 2 shapes – needle and broad leaves
o When leaves fall off of trees in the fall, the plant is entering into a state of dormancy
o Transpiration is when water is given off by plants through their leaves
o When the surface of the leaf is heated by the sun, the water evaporates and become a gas and escapes
o Give support to the plant
o Carry nutrients and water to the plants parts
o Some are thin and waxy that last for one growing season
o Others are thick and woody that last each year
o Hold plants to the soil
o Taproots are one main root that grows deep into the soil. They hold the plant in place. They also have root hairs that take in water and nutrients.
o Fibrous roots are the small and there are many of them. Grass has fibrous roots
o Venus’ Flytrap traps a fly in the trap and digests it to get nutrients that it cannot get from the ground
- What are the two main types of leaves?
- What characteristic of plants determines whether a plant lives one season or more seasons?
- What do roots do to help plants survive?
- What do you think is an important use of woody stems?
- What triggers the Venus' Flytrap leaf to snap shut?
- What happens to the insect's skeleton?
- In what wasy is the Venus' flytrap simlar to other plants?
Lesson 3: Plant Life Cycles
· Seeds form in the cones of conifers and also in flowers
· Seeds are the first part of the plant’s life cycle.
· They need warmth, water, and air.
· When a seed starts to sprout we call it germinate
· The stamen makes the pollen which is a kind of powder
· the pistil collects the pollen
· The bottom part of the pistil is the ovary.
· pollen goes down into the pistil through the stigma, through the stile to the ovary.
· Pollination happens when pollen is carried from a stamen to a pistil by wind or animals.
· Spores are made from one cell
· They are like seeds but they are not the same
· The spores grow on the back of the leaves of some plants.
· Some plants grow from seeds, some from bulbs
· Some can grow from a stem put in water.
· When people take a stem from one plant and place it into the stem of another plant and those two plants grow together, that is called grafting.
· Potatoes are tubers, or swollen underground stems that are often eaten.
- What is the first part of a flowering plant's life cycle?
- In what ways do seeds form?
- Where do spores form on ferns?
- What are two ways plants reproduce?
- What kind of plant reproduces from spores on the back of its leaves?
- What type of climate probably speeds up the cycle?
- What adaptation do spider plants have for reproduction?
- Which two plant adaptations can be split into pieces to grow new plants?
- By what means can some plants' stems be used to make new plants?
Mr. Casey's Class
Catholic High School
1301 De LaSalle Dr.
New Iberia, LA 70560