Research question: All organisms have activities, organisms use energy to accomplish activates. Organisms eat food to gain energy, this energy is stored for later use. Since humans are organisms we eat food to gain energy. Which food of the same category gives us more energy? Hypothesis: Since fat is the main reserve that is burnt…
The pattern that one must consume fuels and dirtily provide energy and power has failed. Applying it has caused and it cannot solve the increasing world energy crisis. Most energy is presently obtained by “dirty methods”. Hence as energy production increases so do harmful combustion of by-products. And if this method continues to be used,…
Hypothesis If the change in temperature is greater when the water is heated with the use of the fire caught by the food substance, then the energy content in the food substance is higher because the heat energy is greater, since the heat energy is absorbed by the water when the fire is kept under…
Energy Capacity to do work Kinetic Energy possessed by an object because it is in motion Potential/Chemical Potential Stored energy: the energy an object has because of its location or chemical structure Study of energy and its transformations System Object being studied Three Types Isolated System Does not exchanged matter or energy with surroundings Ex.…
Organic Compounds Organic Compound: defined as many compounds that contain covalently-bonded carbon atoms. They form the basis of life, and are obtained from living sources (i.e. your skin bones and hair.) Inorganic Compound: compounds other than organic compounds. There are a few exceptions, however, and they include some compounds and polyatomic ions that contain only…
Energy: The capacity to cause change. Kinetic Energy: Energy can be associated with the relative movement of objects; this energy is called kinetic energy. Heat/Thermal Energy: Kinetic energy associated with the random movement of atoms or molecules. Potential Energy: An object not presently moving may still possess energy. Energy that is not kinetic is called…
NUTRITION The study of the nutrients in foods and of the body’s handling of them. This includes ingestion, digestion, absorption, transport, metabolism, interaction, storage, and excretion. FOOD Material containing nutrients taken into the body for the maintenance of life and the growth and repair of tissues. NUTRIENTS Substances obtained from food and used in the…
– As the human population keeps increasing (it’s over 6 billion people right now), we keep requiring more and more energy. – Using too much energy places stress on our energy production systems and may cause blackouts when we need the energy the most. HOW DO WE USE ELECTRICITY? – In order to conserve (save)…
Up to now, we’ve been looking at how matter reacts and changes on a large scale. Now, we’re going to examine why matter changes. To do this, we need to break matter down into its smallest units to understand how it works. THE PARTICLE MODEL All matter can be broken down into smaller pieces until…
Living organisms must continually capture/acquire, store, and use energy to carry out the functions of life. Capturing/acquiring, storing and using energy are accomplished through cellular chemical processes. Cells are chemical machines that obey fundamental chemical and physical laws of nature. The sum of a cells chemical reactions is called metabolism. Energy Energy is the ability…
Energy – needed for: – movement – synthesis of complex compounds – active transport Food – provides energy needed by cells – broken down > heat (body heat, excess removed) chemical storage form Cellular Respiration – is the process by which chemical energy stored in food (usually glucose, but may be protein and lipids is…
Cells must perform thousands of different chemical reactions in order to survive. These reactions are crucial to providing cells with energy. Endergonic reactions: -“energy in” require energy in order to proceed – biological endergonic reactions produce molecules that store energy (ex. Glucose) – Ex. Photosynthesis Exergonic reatctions: – “energy out” release energy – biological exergonic…