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DNA is replicated in the Synthesis stage of the cell cycle.

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Does thermal energy increase during a phase change?

Thermal energy may increase or decrease during a phase change. It depends on which "direction" the change is going. In a phase change between a solid and liquid, as in the case of water, the solid water (ice) will reach 0 °C by absorbing thermal energy. It's temperature will be rising as it absorbs heat. But at the transition temperature, it must still absorb some heat to "make the transition" from ice at 0 °C to water a 0 °C. This thermal energy is the enthalpy of fusion. Thermal energy will have increased during the phase change. Another way make the point is that water at 0 °C will have more thermal energy than an equal mass of ice at 0 °C. If you guessed that the opposite is true, you'd be correct. The changes in thermal energy apply to "regular" phase changes between solids, liquids and gases. (There are other types of phase change that don't involve thermal energy or the change of state from solid, liquid or gas.) A link can be found to the enthalpy of fusion for you to investigate further into this one type of transition. That link is below.


Scientists make blank to help them make a hypothesis or collect data during an experiment?

Scientists make observations to help them make a hypothesis or collect data during an experiment.


How has the photocopier made jobs easier?

Prior to the advent of the photocopier, making a duplicate of any document (such as a type written page) involved either a) using carbon paper to make a rather messy and poor quality copy as you typed, or b) hand copying the document itself. Before computerized word processing, documents were either hand written, or typed. Before the typewriter, they were handwritten. In the 'olden' days before any mechanical writing devices (and discounting the printing press, which was not really an individual's tool) the only way to get a copy of a document was to hand-copy it. Monks and clerks or scribes were an entire class of people who did nothing but reproduce documents.


The longest phase of mitosis?

Longest phase is the prophase. It is the first and longest phase


What do scientists make to help them make a hypothesis or collect data during an experiment?

Observations