The correct answer is B. Lindsay measures the sizes of the craters on the Moon, is the best description of a person doing science.
Science is the practical and intellectual pursuit of the understanding of the physical and natural world that surrounds us. It involves a systematic study: observation, experimentation, data analysis, discussion and conclusion. Science is the human effort to gather knowledge about the universe.
Answer:
B.
Explanation:
The amount of space between particles and their arrangement play a significant role in determining the state of matter—solid, liquid, or gas—and this relationship is closely linked to concepts of density, intermolecular forces, temperature, and pressure.
The relationship between the amount of space between particles and the state of matter is closely tied to the concepts of density and the arrangement of particles. The three primary states of matter are solid, liquid, and gas, and they exhibit different levels of particle spacing and arrangement:
Solid State: In a solid, particles are closely packed together in an ordered and fixed arrangement. The amount of space between particles is minimal, and they vibrate in place around fixed positions. Solids have a definite shape and volume due to the strong intermolecular forces that hold the particles together.
Liquid State: In a liquid, particles are still closely packed, but they have more freedom of movement compared to a solid. The intermolecular forces are weaker, allowing the particles to flow and move around one another. The amount of space between particles is larger than in a solid.
Gas State: In a gas, particles are widely spaced and move independently at high speeds. The amount of space between gas particles is much larger than in solids and liquids. Gases have neither a definite shape nor a definite volume, as they expand to fill the entire volume of their container.
This relationship between particle spacing and state of matter is described by the concept of density. Density is the mass of the substance per unit of the volume. Solids tend to have higher densities because their particles are densely packed, while liquids have lower densities due to the increased particle spacing.
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Answer:
As the space changes between the particles, so does the state of matter. When the temperature of a solid is raised, the particles become more energetic, and they move farther and farther apart.
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Explanation:
A catalyst lowers the activation energy of a reaction allowing them to proceed faster than they would naturally. Activation energy is the free energy that is required to be input in the reactant side to activate them to the transition state after which the reaction proceeds spontaneously to products.
An example of a catalyst is platinum, that is put in the exhaust of cars, to help convert carbon monoxide to carbon dioxide before it is emitted into the air.
Answer: they lower these activation required for the reactions to take place.
Explanation:
B. specific heat
C. freezing point
D. solubility
Pb (lead) is in the 6th period
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