ATI TEAS 7
physics
1. What happens to the momentum of an object when there is no external force acting upon it?
- A. Momentum increases
- B. Momentum decreases
- C. Momentum remains constant
- D. Momentum becomes zero
Correct answer: c
Rationale: In the absence of external forces, momentum remains constant due to the conservation of momentum.
2. When ice melts, it undergoes a…
- A. Chemical change
- B. Physical change
- C. Nuclear change
- D. Radioactive decay
Correct answer: B
Rationale: Melting is a change in physical state, not a change in the chemical composition of the ice.
3. Skeletal muscles are attached to bones by tough connective tissues called
- A. Ligaments
- B. Tendons
- C. Cartilage
- D. Fascia
Correct answer: B
Rationale: The correct answer is B: Tendons. Skeletal muscles are connected to bones by tendons, which are tough connective tissues that transmit the force generated by the muscle to the bone, allowing movement. Ligaments (A) connect bone to bone and provide stability to joints. Cartilage (C) is a smooth, firm tissue that covers the surface of bones at joints, reducing friction and absorbing shock. Fascia (D) is a connective tissue that surrounds muscles and other structures, providing support and protection.
4. Which word best completes the sentence: "The scientist's breakthrough was met with _____ applause."
- A. thunderous
- B. scattered
- C. polite
- D. hesitant
Correct answer: A
Rationale: "Thunderous" emphasizes the intensity and volume of the applause, fitting the significance of the breakthrough.
5. Which of the following is a redox reaction?
- A. 2H2 + O2 → 2H2O
- B. Zn + 2HCl → ZnCl2 + H2
- C. 2NaCl → 2Na + Cl2
- D. CH4 + 2O2 → CO2 + 2H2O
Correct answer: b
Rationale: The oxidation state of Zn changes from 0 to +2, indicating a redox reaction.
6. Vacuoles are large sacs for storage in plant cells. What is their main function in animal cells?
- A. Protein synthesis
- B. Waste storage and disposal
- C. Photosynthesis
- D. Cellular respiration
Correct answer: B
Rationale: Vacuoles in plant cells are primarily used for storage of water, nutrients, and waste products. In animal cells, vacuoles are smaller and serve various functions, including waste storage and disposal. Option B, 'Waste storage and disposal,' is the correct answer because vacuoles in animal cells help maintain cellular homeostasis by storing and breaking down waste materials. This process aids in detoxification and maintaining proper cellular function in animal cells, similar to the role of vacuoles in plant cells.
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