Water cycles among land, ocean, and atmosphere and is propelled by sunlight and gravity. Density variations of sea water drive interconnected ocean currents. Water movement causes weathering and erosion, changing landscape features. Complex interactions determine local weather patterns and influence climate, including the role of the ocean.
The fact that matter is composed of atoms and molecules can be used to explain the properties of substances, diversity of materials, states of matter, phase changes, and conservation of matter. Reacting substances rearrange to form different molecules, but the number of atoms is conserved. Some reactions release energy and others absorb energy.
Within individual organisms, food is broken down through a series of chemical reactions that rearrange molecules and release energy. Animals cannot create organic materials, so they must find organic materials (food) and break the complex organic molecules into simpler molecules that their cells can use- the process of digestion. Animals cells are like plant cells in that they can grow and divide by making complex organic molecules out of simpler molecules-biosynthesis, and that they get energy by oxidizing organic materials in the process of cellular respiration.
Plants use the energy from light to make sugars through photosynthesis. Sunlight is captured by plants and used in a reaction to produce sugar molecules, which can be reversed by burning those molecules to release energy. plant cells in that they can grow and divide by making complex organic molecules out of simpler molecules- biosynthesis, and that they get energy by oxidizing organic materials in the process of cellular respiration.
Unit 7.5 Ecosystem Dynamics Interactions, Relationships & Food Webs
Organisms and populations are dependent on the environmental interactions with both other living things and non-living factors, any of which can limit their growth. Competitive, predatory, and mutually beneficial interactions vary across ecosystems, but the patterns are shared. The atoms that make up the organisms in an ecosystem are cycled repeatedly between the living and non-living parts of the ecosystem. Food webs model how matter and energy are transferred among producers, consumers, and decomposers as the three groups interact within an ecosystem.
Heredity : Inheritance & Variation of Traits Sexual & Asexual Reproduction of Organisms
Students study an introductory unit on heredity. During this unit students will also learn that asexual reproduction results in offspring with identical genetic information and sexual reproduction results in offspring with genetic variation. Students will be introduced to the two types of cell divisions mitosis and meiosis during this unit. Student will learn about Punnett Squares, Gregor Mendel the father of genetics. Inheritance of certain characteristics or behaviors affect the probability of survival of organisms.