Why do experiments usually test one variable at a time?

Light and sound waves are A. both particles and wave, but sound waves are longitudinal waves that can travel through a vacuum B. both longitudinal waves, but one is electromagnetic (light), while the other is not C.

Which of these factors distinguishes the two main types of aquatic habitats?

Small differences between parents and offspring accumulate over time. This process A. Prevents parents from being able to care for their offspring. B. Results in many different types of organisms with different characteristics from their ancestors.

A cloned mammal is made by removing the DNA from the unfertilized egg of an egg donor, replacing it with DNA from a cell of a mature animal, and then implanting that cell into the uterus of a surrogate mother.

Which situation is associated with shear? A. new rock formations B. convergent boundaries C. frequent shallow earthquakes D. volcanic mountain ranges

Harmless bacteria are what type of bacteria? Milady chapter 5

Which kind of action is a cause of air pollution? A. Poisons are released into a major river. B. Gasoline is burned by a car engine. C. Trash is dropped in a national wildlife preserve. D. Tuna are fished to extinction.

Which questions can be answered using the scientific process

What Contains tube-like structures that carry water and nutrients

How does the polarity of water allow for life on Earth?