TEAS 7 Science Practice Test

Correct Answer: B

Rationale: The correct answer is B: make observations. This is the initial step of the scientific method because it involves gathering information about a phenomenon or problem. Observations help in identifying patterns, trends, and potential areas for investigation. Forming a hypothesis (A) comes after making observations, as it is a proposed explanation based on those observations. Analyzing data (C) and forming a question (D) also follow after making observations. Making observations is crucial as it sets the foundation for the rest of the scientific method process.

Correct Answer: B

Rationale: The correct answer is B: tongue. The tongue is the muscular organ responsible for processing food into smaller pieces by moving it around the mouth, mixing it with saliva to form a bolus, and pushing the food towards the back of the mouth to swallow. The pharynx (choice A) is the passageway for food and air, the diaphragm (choice C) is a muscle involved in breathing, and the stomach (choice D) is responsible for further digestion of food. The tongue's specific functions in manipulating food and aiding in swallowing make it the correct choice for this question.

Correct Answer: D

Rationale: The correct answer is D: conducting and respiratory. The conducting zone consists of structures that conduct air to the respiratory zone where gas exchange occurs. The respiratory zone includes the alveoli where oxygen is absorbed and carbon dioxide is released. Choices A, B, and C do not accurately represent the major zones of the respiratory system. The left and right bronchi are part of the conducting zone, not major zones. The nose and mouth are entry points but not major zones. The larynx and pharynx are part of the upper respiratory tract, not major zones.

Correct Answer: D

Rationale: The correct answer is D: mitochondria. Mitochondria are known as the powerhouse of the cell and are responsible for producing energy in the form of ATP through aerobic respiration. Muscle cells require a significant amount of energy for contraction, making mitochondria crucial in supplying this energy. Ribosomes (choice A) are involved in protein synthesis and are not directly related to energy production in cells. Chloroplasts (choice B) are only found in plant cells and are responsible for photosynthesis, not energy production in muscle cells. Vacuoles (choice C) are primarily involved in storage and maintaining cell structure, not energy production. Therefore, D is the correct answer as it directly relates to the energy needs of muscle cells.

Correct Answer: A

Rationale: The correct answer is A, pancreas and salivary glands. Amylase is an enzyme that breaks down starch into sugars. Salivary glands produce salivary amylase, which starts the digestion of carbohydrates in the mouth. The pancreas also produces pancreatic amylase, which further digests carbohydrates in the small intestine. Gall bladder and liver do not produce amylase. Therefore, choices B, C, and D are incorrect as they do not align with the production sites of amylase in the digestive system.