Problem: OPTIONS:
- microscope
- an electron microscope
- fossilized electrons
- fossilized gamma rays
- Carbon fibers
- carbon 14 dating
- chemical equations
- Physical weathering
Q: Fact 1: Radioactive dating is used to determine the age of fossils. Fact 2: Carbon 14 Dating Perhaps the best known radioactive dating is based on . Given the two facts above, the age of a fossil can sometimes be determined by what method?
Answer: carbon 14 dating
Problem: OPTIONS:
- some plants
- Pesticides
- toxins
- steroids
- cigarettes
- fossil fuels
- killing insects
- bacteria
Q: Fact 1: Poison causes harm to living things. Fact 2: Some plants are deadly poisonous . Given the two facts above, what causes harm to living things?
Answer: some plants
Problem: OPTIONS:
- feet
- move
- lightly
- dangerously
- quickly
- two
- safely
- down
Q: Fact 1: Alight bulb is used for seeing in the dark. Fact 2: Evening had arrived quickly, and it was almost too dark for the old man to see where to step safely. Given the two facts above, a light bulb is used for seeing where to step what?
Answer:
safely