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?
OPTIONS:
- microscope
- an electron microscope
- fossilized electrons
- fossilized gamma rays
- Carbon fibers
- carbon 14 dating
- chemical equations
- Physical weathering
carbon 14 dating
--
Fact 1: Animals require water for survival. Fact 2: Water fills the oceans of the world up to sea-level making it a liquid, a type of fluid. Given the two facts above, what requires a type of fluid to survive?
OPTIONS:
- snail
- wind
- tapeworms
- mussels
- stones
- animals
- sand
- Nematoda
animals
--
Fact 1: Plants detect and respond to the daily cycle of light and darkness. Fact 2: Plants are sensitive to light. Given the two facts above, what are plants sensitive to?
OPTIONS:
- Pollution
- sun's heat
- gravity
- moon
- competition
- darkness
- temperature
- tides
darkness
--
Fact 1: Many plants respond to the days growing shorter in the fall by going dormant. Fact 2: Cottonwoods are dormant during the fall. Given the two facts above, what happens to cottonwoods when the days get shorter?
OPTIONS:
- They bloom
- They go dormant
- Dehydration
- It helps them survive
- Exfoliation
- They die
- They reproduce
- They may not survive.
They go dormant
--