Explanation:
valence electron, any of the fundamental negatively charged particles in the outermost region of atoms that enters into the formation of chemical bonds. Whatever the type of chemical bond (ionic, covalent, metallic) between atoms, changes in the atomic structure are restricted to the outermost, or valence, electrons.
a) Warm air rises and cool air sinks : Convection
b) Sun rays warming a puddle : Radiation
c) An egg on a hot skillet : Conduction
d) Boiling water in a pan : Convection
e) Lava lamp : Conduction, Convection, Radiation
f) Feeling the suns heat on your neck : Radiation
g) Stepping on hot sand : Conduction
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Explanation:</h3>
Convection: The mode of heat transfer involving fluids: liquids and gases due to convection currents produced in the fluids are termed as heat transfer due to convection. The <u>dense cool air sinks,</u> air currents push the warm air upwards and thus rising warm air is an example of convection. Boiling water is similarly warm water rising and cool water sinking; the provided heat produces <u>convection currents</u>. Boiling water in a pan is an example of convection.
Conduction: Heat transfer by direct contact between substances is called conduction. An egg on a hot skillet is fried by conduction. The hot frying pan transfers the heat to the egg. The metal frying pan and egg are <u>in contact </u>with each other. Stepping on hot sand makes us feel warm since the hot sand and our feet are <u>in contact</u>. Heat gets transferred through conduction.
Radiation: A puddle getting warm due to sun rays and feeling the sun's heat on our neck is clearly heat transfer due to radiation. Sun rays are <u>electromagnetic waves</u> that are capable of transferring heat energy. The materials are in no direct contact with each other in case of radiation.
A <u>lava lamp</u> shows all three heat transfer modes in different ways. The incandescent light bulb emits light and warms the metal at the bottom of the glass tube through <u>radiation</u>. The heat transfer between the metal below the tube and the liquid inside is through <u>conduction</u>. The flow of liquids with different densities (upward and downward) inside the glass tube is due to <u>convection</u> currents generated in the liquid mixture.
Period of what? ................
A. Only questions about the natural world.
Science can’t answer questions about society or philosophy.
The natural world is what Science is about, so it can answer questions about it.
Aerobic cellular respiration takes place in the presence of oxygen and anaerobic cellular respiration takes place in the absence of oxygen.
Similarities:
- As a beginning molecule, glucose is used in both aerobic and anaerobic respiration, which is a similarity. The substrate is what you see here.
- Additionally, both aerobic and anaerobic respiration results in the production of ATP, but aerobic respiration generates far more ATP than anaerobic respiration.
- In both situations, food is oxidized and energy is liberated.
Differences:
- Anaerobic respiration occurs when there is no oxygen present, whereas aerobic respiration occurs when there is oxygen.
- Alcohol is produced by anaerobic respiration, whereas carbon dioxide and water are the byproducts of aerobic respiration.
- Compared to anaerobic respiration, aerobic respiration produces more energy.
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