Problem:OPTIONS:
- deoxyribonucleic acid
- a knife with sanitized dirt
- Roundworms.
- harmful substances
- Roundworms
- a clean needle
- a clean scapel
- an infected needle

Fact 1: Scraping oneself on a contaminated object may cause infection. Fact 2: Contact with infected blood, contaminated needles. Given the two facts above, getting scraped with what can give oneself an infection?
****
A: an infected needle

Problem:OPTIONS:
- gasoline concentrations
- Warm air moving into cold air
- Greenhouse gases
- treehouse gas concentrations
- movements in the earth's crust
- concentrated orange juices
- genetic diversity
- greenhouse gas concentrations

Fact 1: Carbon dioxide concentrations in the air have increased over the last decade dramatically. Fact 2: Carbon dioxide is the primary greenhouse gas. Given the two facts above, what have increased over the last decade dramatically?
****
A: greenhouse gas concentrations

Problem:OPTIONS:
- salinity
- variable
- heat energy
- reduce
- streams.
- streams
- down
- evaporation

Fact 1: If soil is permeable then water easily flows through that soil. Fact 2: Permeability is affected by many soil characteristics. Given the two facts above, what is the rate of water flow of soil?
****
A: variable

Problem:OPTIONS:
- week days
- during the day
- during winter days
- bloom time
- one celled organisms
- by indirect light
- in the morning
- in the autumn season

Fact 1: Aplant requires sunlight to grow. Fact 2: During the day, sunlight warms the soil. Given the two facts above, when do plants grow the most?
****
A:
during the day