Fact 1: Tectonic plates being pushed together causes earthquakes. Fact 2: Earthquake tremors and volcanic activity are frequent. Given the two facts above, what causes tremors?

OPTIONS:
- tectonic plates coliding
- fissures of hot, acidic water
- sensory neurons
- energy of moving objects
- Thyroid-stimulating hormone
- storms
- the sun
- richter scale

Answer: tectonic plates coliding

Fact 1: Food consists of organic molecules that store energy in their chemical bonds. Fact 2: All organic matter eventually decomposes. Given the two facts above, what eventually decomposes?

OPTIONS:
- Carbon
- food
- bushes
- fungus
- Fungi
- time
- metal
- space

Answer: food

Fact 1: Evolution occurs by a process called natural selection. Fact 2: Birth and death are natural processes. Given the two facts above, what occurs through birth and death?

OPTIONS:
- sleep
- illness
- anemia
- tearing
- Leptospirosis
- nature
- starvation
- evolution

Answer: evolution

Fact 1: Vertebrates are animals that have a backbone. Fact 2: Invertebrates are animals who lack a backbone or spinal column. Given the two facts above, what has a spinal column?

OPTIONS:
- bacteria
- humans
- vertebrates
- lichens
- invertebrates
- athletes
- matter vibrating
- people

Answer:
vertebrates