Science Olympiad in grades 1-12, like a basketball or hockey team, involves year-round training, dedication, guidance, and practice. The National Science Olympiad (NSO) test is a global Olympiad competition in which students from all over the globe participate. It gives a platform for emerging talent to showcase their skills. Learners require these tests to prepare both for national and international competitions. This page is about Science Class 3 Chapter 1: Animals and Plants.
Plants
Plants are abundant in our planet. Certain features and properties are shared by all plants. Plants are also astonishingly varied. This subject helps students comprehend plant components as well as functions. Photosynthesis is the process through which plants generate their own nourishment. Pollination, fertilization, seed distribution, and germination are all examples of how as well as why plants reproduce and thrive.
Some of the most essential plant-animal connections are explained in this unit. It also examines how people use plants for food and resources in a variety of ways.
Plant Adaptations Plant features inherited from parents might vary as well as alter throughout time.
These are features that the plant keeps year after year.
- The shape of a leaf (points to shed water)
- The rate of growth (alpine plants grow quickly)
- noxious material (milkweed-goat, red maple-horse)
- the width of the bark (dry vs. wet)
- Bad taste (greens, acorns, walnuts)
- Seed cover design (for travel)
- Wax coating on leaves (wet vs. dry)
- Falling leaves (northern climates)
- Color and form of flowers (pollinators)
Examples of non-inherited plant features that vary depending on the time of year (how much sunlight, minerals, as well as water are available).
Plant Characteristics
Tropisms are plant characteristics. These are plant responses to their environment. A list of plant tropisms is shown below. This word may or may not be used. Third grade is suited for plant behavior.
Plant roots grow in the direction of gravity, whereas plant stems develop in the reverse way.
Plant leaves and stems grow towards the direction of the strongest light due to phototropism (light response).
Chemotropism is a chemical reaction in which plant roots grow toward minerals that they need and away from those that are detrimental, such as salt.
Thigmotropism is a kind of touch reaction. Some plants, such as the tendrils of the Venus flytrap, morning glory, pea, and squash family, may respond to touch (when they touch anything, they grow in that direction).
Plant Life Cycle
Plants have their own life cycle. It goes like this:
- Seed
- Seedling – germination is the name of this process
- Adult plant
- Flowering – pollination occurs here
- Seeds form
- Seed
Parts of Plants
- Roots
- Stems
- Leaves
- Flower
- Phloem- carries the food (sap) (2-way flow) – living tissue
- Xylem – carries the water (one-way flow – up) – dead tissue (inside of the stem)
Photosynthesis
Photosynthesis is a tough subject for youngsters (and adults) to comprehend, but the basic idea is that plants utilize sunshine to generate sugar from CO2 and water. Plants create energy from sunlight in the same manner that we utilize heat to turn cookie dough into a dessert, for instance.
Chloroplasts are structures found in leaf cells. Chloroplasts contain the chemical chlorophyll, which, via a sophisticated process, turns sunlight into an unstable chemical form of energy accordingly. This chemical (ATP) is subsequently utilized to recombine water and carbon dioxide to produce glucose or sugar, which the plant utilizes for energy (eaten if you will). Sugar can be kept for an extended period of time and, more significantly, animals can consume it.
Animals
Animals may be found all across the globe. They come in a variety of forms, including insects, birds, reptiles, and mammals. To survive, they require food, water, as well as shelter. Pets are animals that live alongside humans.
Forest-dwelling wild animals include lions, tigers, giraffes, elephants, and bears. Domestic animals, such as cows, chickens, and sheep, are animals that are beneficial to people. Your third-grader will love learning about animals – the numerous kinds, their habitats, how they live, what they eat, as well as how they travel!
Habitats for Animals
Do sharks make nests and dwell in trees? Maybe. Maybe not. In this chapter, your kid will relate each animal to its native environment.
Animals Adapting to Environments
How has the dormouse adjusted to its new surroundings? And how about that mole? In this science chapter, your kid will look at illustrations as well as read synopses of four species. They will next think about and develop inferences about how those creatures adapt to their diverse settings accordingly.
Animal Species
Which animal, a reptile, a bird, or a fish? There are several animal species, some of which are related. This science chapter teaches your child that common traits aid in the identification of many species of animals, such as mammals.
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