Answer:
This asks for a picture that's said to be shown on the right...
A physical change is a change which only affects the form of a substance, but not its chemical composition. So, a physical change in terms of particle arrangement states that particles do not change apart from gaining or losing energy. It can be explained using the examples of freezing and melting.
When a substance is solid, its particles like atoms and molecules are very tightly packed. These cannot move freely but when a substance is in liquid or gaseous state, the particles are loosely packed and can move freely. So when water is solid the particles are tight but when it is in liquid state same particles can move faster. Hence, particles are same but their energy has changed.
<span>gas production also meant a doubling in the rate of photosynthesis? ... By adding a number of equal volumes of normal sodium bicarbonate
solution the concentration of carbon dioxide available to the plant is
increased and the gas production measured. Prior knowledge. Sodium hydrogencarbonate is a source of carbon dioxide.</span>
Answer:
They are the digestive and the respiratory systems (O2 as nutrient and CO2 as waste)
Answer:
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.