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Ls4 plants
 

Ls4 plants

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    Ls4 plants Ls4 plants Presentation Transcript

    • Plants LS4 3.08
    • Plants are organisms.
    • Plants are the type of organism that can produce their own food, unlike animals. Animals must consume other organisms for the energy they need.
    • Plants produce food energy in a process called photosynthesis.
    • Three things are needed by plants in order for photosynthesis to occur.
    • Light from the Sun
    • Light from the Sun CO 2 from the air
    • Light from the Sun CO 2 from the air Water from the plants roots
    • Notes:
    • What is the process called in which plants make food? Notes:
    • What is the process called in which plants make food? Photosynthesis Notes:
    • What three things must plants have in order to make food? Notes:
    • What three things must plants have in order to make food? Notes: Light CO 2 water
    •  
    • Plants need small amounts of other substances (vitamins, minerals) to do their best work. Plants get these nutrients from the soil.
    • What do we call the small amounts of vitamins and minerals that plants get from the soil? Notes:
    • What do we call the small amounts of vitamins and minerals that plants get from the soil? Notes: Nutrients
    •  
    • Plants don’t live forever. They grow old and die like every other organism.
    • Plants would disappear from Earth unless they reproduce. “Reproduce” means to make more of the same.
    • The way most plants reproduce is by making seeds .
    • But, before a plant can make a seed, it must get a tiny bit of pollen from a similar plant. This pollen is magnified many times
    • Pollen is made in a plant’s flower. Pollen is a fine powder that can blow on the breezes from one plant to another.
    • But blowing in the wind is not a sure way to get pollen from one plant to another.
    • Sometimes animals help plants move pollen from plant to plant. Plants make nectar, a sweet substance, in their flowers.
    • Pollen sticks to animals as they collect nectar. Some pollen falls off at the next flower. It just takes a tiny bit of pollen for a plant to make a seed.
      • Bees are very important in pollination. Without bees there would be a lot less food for people to eat.
    • How do most plants reproduce (make new plants like themselves)? Notes:
    • How do most plants reproduce (make new plants like themselves)?
      • seeds
      Notes:
    • What must most plants do before they can make seeds? Notes:
    • What must most plants do before they can make seeds? Notes: Get pollen from a similar plant
    • What are two ways that pollen gets from one plant to another? Notes:
    • What are two ways that pollen gets from one plant to another? Notes:
      • Blown by the wind
      • Carried by animals
    • What are two ways that pollen gets from one plant to another? Notes:
      • Blown by the wind
      • Carried by animals
    • What is the most important animal for pollination of plants? Notes:
    • What is the most important animal for pollination of plants? Notes: Bees
    • After pollination has taken place, the plants can make seeds.
    • A seed contains a baby plant together with a supply of food to get it started. Ungerminated plant Plant food seed
    • After it germinates, the new plant must reach the sun for energy before the food in the seed runs out.
    • Some plants produce seeds in ways that make food for animals.
    • Once again animals can help the plants.
    • Once again animals can help the plants. This time, by dispersing seeds so new plants can grow in different areas.
    • Animals drop some seeds as they move around. Animals help plants by dispersing seeds.
      • When animals drop seeds it helps the plant reproduce in new places.
    • What is another way that animals help plants? Notes:
    • What is another way that animals help plants? Dispersing seeds Notes:
    • What does the word “disperse” mean? Notes: To spread around in different places.
    •  
    • A seed can stay dormant (asleep) for years. They usually won’t wake up unless there is water.
    • The word for a seed “waking up” and beginning to grow is germination.
    • Germination is also called sprouting.
    • After the seed germinates, the stem grows up and the roots grow down.
    • Some plants send down one strong, deep root called a taproot.
    • Other plants have a system of many softer roots called fibrous roots.
    • Here are plants with a taproot and a fibrous root side by side. taproot fibrous root
      • Every kind of root has tiny root hairs that absorb water for the plant.
    • Other plants have structures that store a lot of food energy in their roots. These roots are called tubers.
      • Potatoes, radishes, and carrots are all tubers.
      • As plants grow above the ground, the stem holds the leaves up in the air.
      • The stem has tubes that carry water and nutrients from the roots up to the leaves.
      • Plants must have light for energy. The stem holds leaves up to get more light.
      • The leaves must have sunlight to make the food that the plant needs to live and grow.
      • Leaves also give off water vapor as they make food. This water is called transpiration .
      • Leaves also give off water vapor as they make food. This water is called transpiration. Bigger leaves give away more water.
    •  
      • What is the word for water vapor that a plant releases through its leaves?
      Notes:
      • What is the word for water vapor that a plant releases through its leaves?
      Notes: transpiration
      • What are the two words for a seed beginning to grow into a plant?
      Notes:
      • What are the two words for a seed beginning to grow into a plant?
      Notes:
      • germination
      • What are two words for a seed beginning to grow into a plant?
      Notes:
      • germination
      • sprouting
      • What kind of root is strong and grows deep?
      Notes:
      • What kind of root is strong and grows deep?
      Notes: taproot
      • What kind of root system has a lot of smaller roots?
      Notes:
      • What kind of root system has a lot of smaller roots?
      Notes: Fibrous roots
      • What are the tiny roots that absorb water?
      Notes:
      • What are the tiny roots that absorb water?
      Notes: root hairs
      • What kind of roots store large masses of food energy?
      Notes:
      • What kind of roots store large masses of food energy?
      Notes: tubers
    •  
      • Sometimes plants must make changes if they are to survive in their ecosystem.
      • Such changes are called adaptations.
      • A plant in the desert must adapt to very low rainfall and a lot of intense sunshine.
      • Big leaves that give away a lot of water as transpiration wouldn’t help a plant in the desert.
      • Desert plants have adapted by developing very thin leaves that don’t give away much water.
      • Cactus needles are leaves that have adapted to a hot dry environment.
      • It doesn’t rain much in the desert and when it does rain the water doesn’t soak very deep into the soil.
      • It doesn’t rain much in the desert and when it does rain the water doesn’t soak very deep into the soil.
      Deep roots wouldn’t really help a cactus.
      • Cactus plants have adapted to this.
      • Cactus plants have shallow roots, close to the surface, that reach as far out as they can.
      • This is a good adaptation in a place where rain doesn’t soak deep into the ground.
      • Big leaves would be a good adaptation where it rains a lot and big trees steal most of the sunlight.
    •  
    • What is the word for a change that an organism makes to help in live in its environment? Notes:
    • What is the word for a change that an organism makes to help in live in its environment? Notes: adaptation
    • Trees in different climates have to adapt to their local conditions.
    • In a tropical rainforest, near the equator, it is always hot and it rains almost every day. Many plants thrive here.
    • Trees may adapt here by growing very high to catch more sunlight.
    • Plants that don’t grow high need to adapt with large leaves to catch more of the limited sunlight that makes it down low.
    •  
    • Deciduous forest dee sid jew us
    • Deciduous forest dee sid jew us Temperate climates are hot in the summer.
    • Deciduous forest dee sid jew us But they can be very cold in the winter.
    • Deciduous trees adapt to hot summers and cold by having lots of leaves in summer, dropping them all in autumn, and hibernating all winter. summer winter
    •  
      • Deserts
      • Most desert trees have adapted by growing near the few sources of water.
      • Or they have adapted small leaves that don’t lose a lot of water through transpiration.
    •  
    • No trees can adapt to grow in ground that is always frozen. In the tundra , in the far north and south latitudes, there are no trees.
      • If an organism can’t adapt to its environment, it won’t survive.