TEXAS CSR WKT EXAM ACTUAL QUESTIONS AND
CORRECT ANSWERS WITH RATIONALE LATEST UPDATE
ALREADY GRADED A+ ASSURED PASS
Questions 1-50: Science & Nature
1. What is the hardest known natural material found on Earth?
A) Diamond
B) Graphene
C) Moissanite
D) Corundum
Correct Answer: A
Rationale: Diamond scores a 10 on the Mohs scale of hardness. While
Graphene is incredibly strong, diamond is specifically the hardest natural
material.
2. Which planet in our solar system has the most moons?
A) Jupiter
B) Saturn
C) Uranus
D) Neptune
Correct Answer: B
,Rationale: Saturn has the most confirmed moons (currently 146),
surpassing Jupiter.
3. What is the chemical symbol for Potassium?
A) P
B) Po
C) K
D) Pt
Correct Answer: C
Rationale: The symbol 'K' is derived from the Latin word *kalium*.
4. How many bones does an adult human skeleton have?
A) 206
B) 270
C) 300
D) 180
Correct Answer: A
Rationale: While babies have around 270 bones, many fuse together
during growth, resulting in 206 bones in adulthood.
5. What is the only mammal capable of true sustained flight?
A) Flying Squirrel
B) Bat
,C) Sugar Glider
D) Pterodactyl
Correct Answer: B
Rationale: Bats are the only mammals that can truly fly. Flying squirrels and
sugar gliders glide.
6. Which blood type is known as the "universal donor"?
A) AB positive
B) O negative
C) A positive
D) B negative
Correct Answer: B
Rationale: O negative blood lacks A, B, and Rh antigens, meaning it can be
given to patients of any blood type.
7. What is the largest internal organ in the human body?
A) Heart
B) Brain
C) Liver
D) Lung
Correct Answer: C
Rationale: The liver is the largest solid internal organ. (The skin is the
largest organ overall).
, 8. What is the process by which plants release water vapor into the
atmosphere?
A) Photosynthesis
B) Respiration
C) Transpiration
D) Condensation
Correct Answer: C
Rationale: Transpiration is the movement of water through a plant and its
evaporation from aerial parts, like leaves.
9. Which element is essential for the production of thyroid hormones?
A) Iron
B) Zinc
C) Iodine
D) Calcium
Correct Answer: C
Rationale: The thyroid gland uses iodine to produce thyroxine (T4) and
triiodothyronine (T3).
10. What is the most abundant gas in Earth's atmosphere?
A) Oxygen
B) Carbon Dioxide
C) Nitrogen
D) Argon
CORRECT ANSWERS WITH RATIONALE LATEST UPDATE
ALREADY GRADED A+ ASSURED PASS
Questions 1-50: Science & Nature
1. What is the hardest known natural material found on Earth?
A) Diamond
B) Graphene
C) Moissanite
D) Corundum
Correct Answer: A
Rationale: Diamond scores a 10 on the Mohs scale of hardness. While
Graphene is incredibly strong, diamond is specifically the hardest natural
material.
2. Which planet in our solar system has the most moons?
A) Jupiter
B) Saturn
C) Uranus
D) Neptune
Correct Answer: B
,Rationale: Saturn has the most confirmed moons (currently 146),
surpassing Jupiter.
3. What is the chemical symbol for Potassium?
A) P
B) Po
C) K
D) Pt
Correct Answer: C
Rationale: The symbol 'K' is derived from the Latin word *kalium*.
4. How many bones does an adult human skeleton have?
A) 206
B) 270
C) 300
D) 180
Correct Answer: A
Rationale: While babies have around 270 bones, many fuse together
during growth, resulting in 206 bones in adulthood.
5. What is the only mammal capable of true sustained flight?
A) Flying Squirrel
B) Bat
,C) Sugar Glider
D) Pterodactyl
Correct Answer: B
Rationale: Bats are the only mammals that can truly fly. Flying squirrels and
sugar gliders glide.
6. Which blood type is known as the "universal donor"?
A) AB positive
B) O negative
C) A positive
D) B negative
Correct Answer: B
Rationale: O negative blood lacks A, B, and Rh antigens, meaning it can be
given to patients of any blood type.
7. What is the largest internal organ in the human body?
A) Heart
B) Brain
C) Liver
D) Lung
Correct Answer: C
Rationale: The liver is the largest solid internal organ. (The skin is the
largest organ overall).
, 8. What is the process by which plants release water vapor into the
atmosphere?
A) Photosynthesis
B) Respiration
C) Transpiration
D) Condensation
Correct Answer: C
Rationale: Transpiration is the movement of water through a plant and its
evaporation from aerial parts, like leaves.
9. Which element is essential for the production of thyroid hormones?
A) Iron
B) Zinc
C) Iodine
D) Calcium
Correct Answer: C
Rationale: The thyroid gland uses iodine to produce thyroxine (T4) and
triiodothyronine (T3).
10. What is the most abundant gas in Earth's atmosphere?
A) Oxygen
B) Carbon Dioxide
C) Nitrogen
D) Argon
