Answer the following question given this paragraph: Earth goes through regular changes in its position relative to the Sun. Its orbit changes slightly. Earth also wobbles on its axis of rotation. The planet also changes its axial tilt , the angle of its axis of rotation. These changes can affect Earth's temperature. Q: What do you call the angle of the earth's axis of rotation? Choices: - dynamic tilt - vertical tilt - horizontal tilt - axial tilt A:
axial tilt
(Question)
Answer the following question given this paragraph: When iron and sulfur are mixed together in a certain ratio and heated, a chemical reaction occurs. This results in the formation of a unique new compound, called iron sulfide (FeS). A magnet cannot be used to mechanically separate the iron from the iron sulfide because metallic iron does not exist in the compound. Instead, another chemical reaction is required to separate the iron and sulfur. Q: When iron and sulfur are mixed together in a certain ratio and heated, what do they become? Choices: - iron oxide - rust - sulfuric acid - iron sulfide A:
(Answer)
iron sulfide
Ques: Answer the following question given this paragraph: The sun and other stars consist of plasma. Plasma is also found naturally in lightning and the northern and southern lights. Human-made plasma is found in fluorescent lights, plasma TV screens, and plasma spheres. Q: What material comprises the sun and other stars, as well as lightning and the northern lights? Choices: - aurora - gamma - gas - plasma A:
Ans: plasma
(Q).
Answer the following question given this paragraph: Like bacteria, archaeans are important decomposers. For example, archaeans help break down sewage in waste treatment plants. As decomposers, they help recycle carbon and nitrogen. Q: Archaeans help break down sewage in waste treatment plants, so they fulfill what important role? Choices: - producers - consumers - pollenation - decomposer A:
(A).
decomposer
Ques:Answer the following question given this paragraph: The heart is a muscular organ in the chest that consists mainly of cardiac muscle. It pumps blood through blood vessels by repeated, rhythmic contractions. Blood flows through four chambers of the heart when it beats. Heartbeat is controlled by electrical signals from special cells within the heart called the pacemaker. Q: What type of muscle makes up most of the heart? Choices: - chest muscles - heart muscle - respiratory muscle - cardiac muscle A:

Ans:cardiac muscle
Answer the following question given this paragraph: After tissues, organs are the next level of organization of the human body. An organ is a structure that consists of two or more types of tissues that work together to do the same job. Examples of human organs include the brain, heart, lungs, skin, and kidneys. Human organs are organized into organ systems, many of which are shown in Figure below . An organ system is a group of organs that work together to carry out a complex overall function. Each organ of the system does part of the larger job. Q: What is a structure that consists of two or more types of tissues that work together to do the same job? Choices: - cell - organ system - organism - organ A:
organ