Answer the following question given this paragraph: Chemical reactions always involve energy. Energy is a property of matter that is defined as the ability to do work. When methane burns, for example, it releases energy in the form of heat and light. Other chemical reactions absorb energy rather than release it. Q: Chemical reactions always involve what? Choices: - fuel - heating - physical change - energy A:
energy
(Question)
Answer the following question given this paragraph: Inside every cell of all living things, energy is needed to carry out life processes. Energy is required to break down and build up molecules and to transport molecules across plasma membranes. All life's work needs energy. A lot of energy is also simply lost to the environment as heat. The story of life is a story of energy flowits capture, its change of form, its use for work, and its loss as heat. Energy, unlike matter, cannot be recycled, so organisms require a constant input of energy. Life runs on chemical energy. Where do living organisms get this chemical energy?. Q: What is required to break down and build up molecules and to transport molecules across plasma membranes? Choices: - salt - electricity - calcium - energy A:
(Answer)
energy
Ques: Answer the following question given this paragraph: An electromagnetic wave begins when an electrically charged particle vibrates. The Figure below shows how this happens. A vibrating charged particle causes the electric field surrounding it to vibrate as well. A vibrating electric field, in turn, creates a vibrating magnetic field. The two types of vibrating fields combine to create an electromagnetic wave. You can see animations of electromagnetic waves at these URLs:. Q: Electromagnetic waves are generally caused by magnetic fields doing what (or moving in what way)? Choices: - revolving - rippling - folding - vibrating A:
Ans: vibrating
(Q).
Answer the following question given this paragraph: The continental slope lies between the continental shelf and the abyssal plain. It has a steep slope with a sharp drop to the deep ocean floor. Q: What lies between the continental shelf and the abyssal plain? Choices: - successive slope - continental belt - equator - continental slope A:
(A).
continental slope
Ques:Answer the following question given this paragraph: The wavelength of a transverse wave can be measured as the distance between two adjacent crests. The wavelength of a longitudinal wave can be measured as the distance between two adjacent compressions. Q: The wavelength of a what type of wave can be measured as the distance between two adjacent compressions? Choices: - horizontal - lateral - vertical - longitudinal A:

Ans:longitudinal
Answer the following question given this paragraph: 25.1 The Ray Aspect of Light There are three ways in which light can travel from a source to another location. (See Figure 25.3. ) It can come directly from the source through empty space, such as from the Sun to Earth. Or light can travel through various media, such as air and glass, to the person. Light can also arrive after being reflected, such as by a mirror. In all of these cases, light is modeled as traveling in straight lines called rays. Light may change direction when it encounters objects (such as a mirror) or in passing from one material to another (such as in passing from air to glass), but it then continues in a straight line or as a ray. The word ray comes from mathematics and here means a straight line that originates at some point. It is acceptable to visualize light rays as laser rays (or even science fiction depictions of ray guns). Ray The word "ray" comes from mathematics and here means a straight line that originates at some point. Q: Regardless of the mode, light is modeled as traveling in straight lines called what? Choices: - waves - arrows - electrons - rays A:
rays