Answer: Thermal energy flows from a warmer material to a cooler material. When thermal energy is transferred to a material, the motion of its particles speeds up and its temperature increases. There are three ways heat is transferred into and through the atmosphere: Radiation, conduction and convection.
Radiation is when energy, in the form of electromagnetic radiation, is emitted by a heated surface in all directions and travels directly to its point of absorption at the speed of light; thermal radiation does not require an intervening medium to carry it. Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules. Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it.
Answer: A
Explanation:
The three reactants used in photosynthesis are water (H2O) carbon dioxide (CO2), and light (sunlight energy). These reactants are used to produce glucose/food for plants and oxygen that is later released.
Answer:
B.Evolution, natural selection
Explanation:
Charles Darwin is known as the "Father of Evolution" because he proposed the idea of evolution by way of natural selection.
According to the Food and Nutrition Board, of the National Academy of Sciences, 10% to 35% of kilocalories should come from protein.
There are six classes of food, but the three majors ones, that are require in large quantity are carbohydrates, proteins and fats and oils. The Food and Nutrition board gave recommendation about the quantity of these classes of food that should be taken on a daily basis. It is recommended that, 45% to 65% of kilocalories should come from carbohydrates while 20% to 35% come from fat.
