Fact 1: Agreenhouse is used to protect plants by keeping them warm. Fact 2: Flowers are the major greenhouse crops. Given the two facts above, what are the major crop that needs protecting by keeping them warm?

OPTIONS:
- our planet
- organisms
- Earthworms
- Flowers
- Echinoids
- toughness
- support
- cellulose

Answer: Flowers

Fact 1: HIV infects and destroys helper T cells. Fact 2: Scientists agree that HIV causes Aids. Given the two facts above, what infects and destroys helper T cells?

OPTIONS:
- swea
- Wasps
- AIDS
- CO 2
- PDAs
- humans
- heat
- anemia

Answer: AIDS

Fact 1: The moon revolving around the Earth causes the phases of the moon. Fact 2: Phases of the Moon are caused by differing amounts of light reflected from the Earth. Given the two facts above, what causes differing light to reflect off of the moon?

OPTIONS:
- depress neuronal excitability
- energy of moving objects
- The revolution around earth
- our nearest star
- a hemisphere is tilted away from the sun
- focusing a lens
- flow of electrons
- that material's properties

Answer: The revolution around earth

Fact 1: Plants exhibit phototropism, or growing toward a light source. Fact 2: Stems are positively phototropic. Given the two facts above, what do stems grow towards?

OPTIONS:
- roots
- flowers
- water
- light
- seeds
- dark
- the sun
- Trees

Answer:
light