*Question*
Q: Two events are defined to be simultaneous if an observer measures them as occurring at what? Read this paragraph and choose the correct option from the provided answers: 28.2 Simultaneity And Time Dilation Two events are defined to be simultaneous if an observer measures them as occurring at the same time. They are not necessarily simultaneous to all observerssimultaneity is not absolute. Time dilation is the phenomenon of time passing slower for an observer who is moving relative to another observer. Observers moving at a relative velocity v do not measure the same elapsed time for an event. Proper time t 0 is the time measured by an observer at rest relative to the event being observed. Proper time is related to the time by an Earth-bound observer by the equation. Choices: - midnight - opposite times - different times - same time A:
**Answer**
same time

*Question*
Q: What kind of membrane do prokaryotic cells have? Read this paragraph and choose the correct option from the provided answers: Like other cells, prokaryotic cells have a plasma membrane (see Figure below ). It controls what enters and leaves the cell. It is also the site of many metabolic reactions. For example, cellular respiration and photosynthesis take place in the plasma membrane. Choices: - cell wall - cellulose - plasma wall - plasma membrane A:
**Answer**
plasma membrane

*Question*
Q: What two substances do plants give off when they make food? Read this paragraph and choose the correct option from the provided answers: Choices: - water and oil - carbon dioxide and oxygen - chlorophyll and nitrogen - oxygen and water A:
**Answer**
oxygen and water

*Question*
Q: Solar cells turn sunlight directly into what? Read this paragraph and choose the correct option from the provided answers: Solar energy is used to heat homes and water, and to make electricity. Scientists and engineers have many ways to get energy from the Sun ( Figure below ). One is by using solar cells. Solar cells are devices that turn sunlight directly into electricity. Lots of solar cells make up an individual solar panel. You may have seen solar panels on roof tops. The Sun's heat can also be trapped in your home by using south facing windows and good insulation. Choices: - gas - water - cold - electricity A:
**Answer**
electricity