Fact 1: Air pollution harms the respiratory and circulatory systems. Fact 2: Sulfur dioxide can irritate the respiratory system and damage the heart and circulatory system. Given the two facts above, what organ is harmed by air pollution?

OPTIONS:
- piano
- church organ
- heart
- harp
- bushes
- animals
- eardrum
- lungs

Answer: heart

Fact 1: Zinc has a positive impact on the healing of wounds. Fact 2: Wounds A wound is an injury to the skin and underlying soft tissues. Given the two facts above, what does zinc have a positive impact on?

OPTIONS:
- Most plants
- genetic material
- water conservation
- lowered energy cost
- injury to the skin
- consumers
- circulatory systems
- nutrients

Answer: injury to the skin

Fact 1: Cartilage is a tough tissue that contains a protein called collagen. Fact 2: Many collagen fibrils come together and form a collagen and forma collagen fiber. Given the two facts above, cartilage is a tough tissue made up of:?

OPTIONS:
- a cuticle
- bones
- Joules
- neurons
- the skin
- loose soil
- fibrils
- muscle

Answer: fibrils

Fact 1: The vanes rotating in an electric fan causes air to move. Fact 2: Air molecules move slowly when they are cool. Given the two facts above, vanes rotating in an electric fan causes air molecules to what?

OPTIONS:
- cool
- heat
- Slow.
- slow
- fly
- Move
- expand
- motion

Answer:
cool