Logic of a solution: *All chemical reactions require activation energy to get started. Catalysts lower the activation energy. A catalyst can lower the energy cost of a chemical reaction.*
*(B)*
The original question: *In what way does a catalyst help in chemical reactions?
Options:
- (A) Generating heat
- (B) lowered energy cost
- (C) metabolic reaction
- (D) heating liquids
- (E) by making heat
- (F) adding heat
- (G) increases a body's strength
- (H) preventing heat transfer*

Logic of a solution: *Evaporation of sweat uses energy, and the energy comes from body heat. Energy is the body's fuel. When sweat is evaporated, the body's fuel is used.*
*(B)*
The original question: *What powers sweat?
Options:
- (A) heat produced
- (B) The body's fuel
- (C) a gas in the air
- (D) hydration
- (E) When the water is hot
- (F) air cools
- (G) matter vibrating
- (H) Cooling vapors*

Logic of a solution: *Gymnosperms are vascular plants that produce seeds in cones. Gymnosperms are the plants that are known as evergreens. Evergreens are vascular plants that produce seeds in cones.*
*(G)*
The original question:
*What are vascular plants that produce seeds in the form of cones?
Options:
- (A) Leptospirosis
- (B) more abundant
- (C) Newton
- (D) it needs them
- (E) Conifers
- (F) epidermal
- (G) evergreens
- (H) white*