Exam 2: Science - Matter - and Energy

The second law of thermodynamics says that whenever energy is converted from one form to another in a physical or chemical change,____.​

The atomic number of an element is the number of ____.​

The pH of a solution is a measure of ____________________ ions and ____________________ ions in that solution.

Once scientists have analyzed data from an experiment,they may propose a testable hypothesis to explain those data.​

A tiny, tawny colored butterfly called the Carson Wandering Skipper was always known for its small and very localized populations. Typically, it was found along the western Nevada and eastern California high desert areas. It was always located close to hot springs and other wet areas that supported salt grass, the host plant it depended on. Recently, the populations went into a steep decline, and a last hold-out area was threatened by imminent construction of a freeway bypass. Biologists became alarmed and began an intensive search for populations in locations other than the spot designated for the freeway bypass. They began their search by identifying all known locations of hot springs, in hopes of finding small populations of the Carson Wandering Skipper close by. -As biologists searched for previously unknown populations of the Carson Wandering Skipper,biologists wondered if hot springs were absolutely essential to its survival.This phase of the investigation is ____.​

Which of the following contains all of the others?​

The law of ____________________ of matter states that whenever matter undergoes a physical or chemical change,no atoms are created or destroyed.

Match items with their appropriate chemical description. -The ammonium ion​

​Give an example of a way you can convert potential energy into kinetic energy.

____________________ occurs when the nuclei of certain isotopes with large mass numbers are split apart into lighter nuclei and release energy when struck by a neutron.​

​Protons,neutrons,and electrons are all ____.

Match items with their appropriate chemical description. -The chemical symbol for the element phosphorus​

Match items with their appropriate chemical description. -The chemical formula for glucose

When energy changes from one form to another,it always goes from a more useful to a less useful form.

Match items with their appropriate chemical description. -A subatomic particle with no net electrical charge​

Simple organic molecules called monomers can be linked together by chemical bonds to form ____.​

Scientific hypotheses differ from scientific theories in that they are ____.

Critical thinking includes ____.​

In a scientific investigation,one of the groups involved in the investigation has a chosen variable changed in a known way.This group is designated as the ____________________group.

Wind farms are viable options for supplying more of our energy needs in the future because ____.​