Earth, Sun Chemistry.

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Presentation transcript:

Earth, Sun Chemistry

Matter Anything that has mass and volume. Solid: definite shape; definite volume Liquid: no definite shape; definite volume Gas: no definite shape; no definite volume Plasma: is a gas in which a certain portion of the particles are ionized; no definite shape or volume;

Element Substance that cannot be broken down into simpler substances. Ex. Oxygen, hydrogen, chlorine 115 known elements; 92 occur naturally.

Atom Smallest part of an element that has all the properties of that element. Subatomic particles are the parts of an atom. Electrons: negatively charged Protons: positively charged Neutrons: neutral (no) charge

Structure Nucleus: protons + neutrons positive charge Electron cloud: energy levels inhabited by electrons overall negative charge.

Fusion vs. Fission Fusion Fission Combines atoms Larger atoms are formed Fuse hydrogen atoms into helium atoms In the core of the sun Higher temperatures are created Splits atoms Smaller atoms are formed Use uranium atoms to begin reaction Nuclear power plants Creates radioactive waste What do we do with it? BOTH: Release energy Use atoms E = mc2

Fusion Fission

Our Sun Made of mostly plasma Average rotation: 27 Earth days Gas that shares electrons Average rotation: 27 Earth days Surface temperature = 5500ºC (9932ºF) Interior temperature = 15,000,000ºC (27,000,000ºF) FUSION TAKES PLACE!!!!!!!!!!!!!!

Sunlight The sun radiates energy into space This energy is called electromagnetic energy and travels to Earth in the form of radiation Speed of light: 3x10^8 m/sec The term “radiation” simply means that the energy travels as waves, in straight lines

Electromagnetic Spectrum There are many different types of electromagnetic energy Differentiated by wavelength and frequency All together we called them the electromagnetic spectrum The sun mostly emits ultraviolet, visible light, and infrared

Cosmic Rays High-energy particles that flow into our solar system Most deflected by Earth’s magnetic field Others interact with Earth’s atmosphere and collide with molecules in the air

Solar Energy for Life on Earth Life on Earth relies on solar energy from the sun! Plants transform solar energy into chemical energy through photosynthesis Make food for themselves We eat the plants or eat the animals that eat the plants!