Fact 1: Aging is associated with the death of cells. Fact 2: Cell death is natural. Given the two facts above, what is natural?

OPTIONS:
- Spruce
- artificial sweetener
- aging
- wetland
- fake purses
- wind
- imitation crab
- Light

Answer: aging

Fact 1: Plasma is formed by electrons separating from atoms in stars. Fact 2: Plasma is more common in stars, because making plasma requires high temperatures. Given the two facts above, under what conditions does plasma form?

OPTIONS:
- cold weather
- under water
- hydrogen and oxygen
- windy plains
- high temperatures
- It gets heated up
- nucleus of a cell
- flow of electrons

Answer: high temperatures

Fact 1: When a hemisphere is tilted away from the sun , that hemisphere receives less direct sunlight. Fact 2: Similarly, stars are referred to as suns, but our star is the Sun. Given the two facts above, what does a hemisphere need to be tilted away from the receive less sunlight?

OPTIONS:
- h2o
- heat energy
- equator
- Energy.
- clouds
- our star
- an object
- energy

Answer: our star

Fact 1: Conserving water can be used for survival in a dry environment. Fact 2: Water conservation saves money and energy. Given the two facts above, saving water is important for surviving in what kind of environment?

OPTIONS:
- a cold environment
- a dry environment
- colder and wetter
- threatened
- reducing acid rain
- a wet environment
- to stay warm
- a rainy environment

Answer:
a dry environment