Q: Q: Physical or chemical changes are generally accompanied by a transfer of what? Read this paragraph and choose the correct option from the provided answers: When physical or chemical changes occur, they are generally accompanied by a transfer of energy. The law of conservation of energy states that in any physical or chemical process, energy is neither created nor destroyed. In other words, the entire energy in the universe is conserved. In order to better understand the energy changes taking place during a reaction, we need to define two parts of the universe, called the system and the surroundings. The system is the specific portion of matter in a given space that is being studied during an experiment or an observation. The surroundings is everything in the universe that is not part of the system. In practical terms for a laboratory chemist, the system is the particular chemicals being reacted, while the surroundings is the immediate vicinity within the room. During most processes, energy is exchanged between the system and the surroundings. If the system loses a certain amount of energy, that same amount of energy is gained by the surroundings. If the system gains a certain amount of energy, that energy is supplied by the surroundings. Choices: - shape - pressure - color - energy A:
A: energy

Q: Q: What is the term for a process that changes some chemical substances into others? Read this paragraph and choose the correct option from the provided answers: A chemical reaction is a process that changes some chemical substances into others. During a chemical reaction, the reactants are used up to create the products. Choices: - acid reaction - toxic reaction - chain reaction - chemical reaction A:
A: chemical reaction

Q: Q: What type of ecologists work to identify and manipulate the processes that most limit recovery of ecosystems from disturbances? Read this paragraph and choose the correct option from the provided answers: Choices: - environmental - conservation ecologists - quality ecologists - restoration ecologists A:
A: restoration ecologists

Q: Q: What do you call a circuit that consists of one loop, which if interrupted at any point, causes cessation of the whole circuit's electric current? Read this paragraph and choose the correct option from the provided answers: A circuit that consists of one loop is called a series circuit . You can see a simple series circuit below. If a series circuit is interrupted at any point in its single loop, no current can flow through the circuit and no devices in the circuit will work. In the series circuit below, if one light bulb burns out, the other light bulb won't work because it won't receive any current. Series circuits are commonly used in flashlights. You can see an animation of a series circuit at this URL: http://regentsprep. org/regents/physics/phys03/bsercir/default. htm. Choices: - parallel circuit - constant circuit - dramatic circuit - series circuit A:
A: series circuit