Q: In studying energy, what term do scientists use to refer to the matter and its environment involved in energy transfers? Read this paragraph and choose the correct option from the provided answers: 6.3 The Laws of Thermodynamics In studying energy, scientists use the term "system" to refer to the matter and its environment involved in energy transfers. Everything outside of the system is called the surroundings. Single cells are biological systems. Systems can be thought of as having a certain amount of order. It takes energy to make a system more ordered. The more ordered a system is, the lower its entropy. Entropy is a measure of the disorder of a system. As a system becomes more disordered, the lower its energy and the higher its entropy become. A series of laws, called the laws of thermodynamics, describe the properties and processes of energy transfer. The first law states that the total amount of energy in the universe is constant. This means that energy can't be created or destroyed, only transferred or transformed. The second law of thermodynamics states that every energy transfer involves some loss of energy in an unusable form, such as heat energy, resulting in a more disordered system. In other words, no energy transfer is completely efficient and tends toward disorder. Choices: - molecule - ecosystem - world - system A:
system

(Question)
Q: Electrons move, but they aren't destroyed. this is the law of conservation of what? Read this paragraph and choose the correct option from the provided answers: Like the formation of ions, the formation of charged matter in general depends on the transfer of electrons either between two materials or within a material. Three ways this can occur are friction, conduction, and polarization. In all cases, the total charge remains the same. Electrons move, but they aren't destroyed. This is the law of conservation of charge . Choices: - energy - cost - matter - charge A:
(Answer)
charge

Ques: Q: What is the process in which a liquid changes to a solid? Read this paragraph and choose the correct option from the provided answers: Freezing is the process in which a liquid changes to a solid. It occurs when a liquid cools to a point at which its particles no longer have enough energy to overcome the force of attraction between them. Choices: - condensation - boiling - melting - freezing A:
Ans: freezing

(Q).
Q: What is the area where an electron is most likely to be found called? Read this paragraph and choose the correct option from the provided answers: wave functions can predict within a certain level of probability where an electron might be at any given time. The area where an electron is most likely to be found is called its orbital. Recall that the Bohr model depicts an atom's electron shell configuration. Within each electron shell are subshells, and each subshell has a specified number of orbitals containing electrons. While it is impossible to calculate exactly where an electron is located, scientists know that it is most probably located within its orbital path. Subshells are designated by the letter s, p, d, and f. The s subshell is spherical in shape and has one orbital. Principal shell 1n has only a single s orbital, which can hold two electrons. Principal shell 2n has one s and one p subshell, and can hold a total of eight electrons. The p subshell has three dumbbell-shaped orbitals, as illustrated in Figure 2.8. Subshells d and f have more complex shapes and contain five and seven orbitals, respectively. These are not shown in the illustration. Principal shell 3n has s, p, and d subshells and can hold 18 electrons. Principal shell 4n has s, p, d and f orbitals and can hold 32 electrons. Moving away from the nucleus, the number of electrons and orbitals found in the energy levels increases. Progressing from one atom to the next in the periodic table, the electron structure can be worked out by fitting an extra electron into the next available orbital. Choices: - neutron - proton - neucleus - orbital A:
(A).
orbital

Ques:Q: What zone is the narrow strip along the coastline that is covered by water at high tide and exposed to air at low tide? Read this paragraph and choose the correct option from the provided answers: The intertidal zone is the narrow strip along the coastline that is covered by water at high tide and exposed to air at low tide (see Figure below ). There are plenty of nutrients and sunlight in the intertidal zone. However, the water is constantly moving in and out, and the temperature keeps changing. These conditions require adaptations in the organisms that live there, such as the barnacles in Figure below . Choices: - aquifer zone - disturbance zone - astrolabe zone - intertidal zone A:

Ans:intertidal zone

Question: Q: In what type of mining must tunnels be blasted into the rock so that miners and equipment can get to the ore? Read this paragraph and choose the correct option from the provided answers: If an ore is deep below Earth's surface it may be too expensive to remove all the rock above it. These deposits are taken by underground mining. Underground mines can be very deep. The deepest gold mine in South Africa is more than 3,700 m deep (that is more than 2 miles)! There are various methods of underground mining. Underground mining is more expensive than surface mining. Tunnels must be blasted into the rock so that miners and equipment can get to the ore. Underground mining is dangerous work. Fresh air and lights must be brought in to the tunnels for the miners. The miners breathe in lots of particles and dust while they are underground. The ore is drilled, blasted, or cut away from the surrounding rock and taken out of the tunnels. Sometimes there are explosions as ore is being drilled or blasted. This can lead to a mine collapse. Miners may be hurt or killed in a mining accident. Choices: - open-pit mining - strip mining - gold mining - underground mining A:
Answer:
underground mining