Q: Fact 1: Gravity pulls objects towards planets. Fact 2: Gravity is the force that keeps planets in orbit around the sun. Given the two facts above, what pulls objects around the sun? | OPTIONS:
- Oxygen
- cycles
- wind
- Energy.
- energy
- Gravity
- h2o
- Atmosphere
A: Gravity

Q: Fact 1: Adding salt to a liquid decreases the melting point of that liquid. Fact 2: Salt particles come from the ocean as the spray of waves evaporates, leaving salt particles suspended in the air. Given the two facts above, what can be added to a liquid to decrease the melting point of the liquid? | OPTIONS:
- kinetic energy
- energy of moving objects
- Sulfur dioxide
- fossil fuels
- Chemical energy
- activation energy
- aqueous solution
- Something from an ocean
A: Something from an ocean

Q: Fact 1: Cells are the basic units of the structure and function of living things. Fact 2: Humans, angels, animals, and all other living things are finite. Given the two facts above, what are cells the basic units of? | OPTIONS:
- density
- clouds
- embryos
- plants
- matter
- ferns
- humans
- batteries
A: humans

Q: Fact 1: All life relies on a relatively narrow range of pH, or acidity. Fact 2: Plant life has increased. Given the two facts above, what relies on a narrow pH range? | OPTIONS:
- trees
- potatoes
- a fish
- cacti
- pine
- plants
- Oak
- bacteria
A: plants