Fact 1: Amphibians are the first true tetrapods, or vertebrates with four limbs. Fact 2: All frogs are amphibians. Given the two facts above, the first tetrapods were?

OPTIONS:
- major threat to health
- remains of prehistoric life
- in the frog family
- running and lifting
- competing for resources
- warm-blooded
- objects that have mass
- graptolites

Answer: in the frog family

Fact 1: Gases from burning coal and oil dissolving in water in the atmosphere causes acid rain. Fact 2: Acid rain comes from polluted clouds. Given the two facts above, gases from burning coal and and oil dissolving in the atmosphere can cause what?

OPTIONS:
- polluted rain
- disease
- humidity
- thunderstorms
- snow
- contamination
- Temperature
- harmful substances

Answer: polluted rain

Fact 1: Natural disasters can cause animals to leave an environment. Fact 2: Floods are the most common natural disaster. Given the two facts above, what can cause an animal to leave an environment?

OPTIONS:
- wind
- influenza
- drought
- Pollution
- mines
- floods
- chemicals
- coal

Answer: floods

Fact 1: Storms cause bodies of water to increase amount of water they contain. Fact 2: Hurricanes are killer storms. Given the two facts above, what do hurricanes do to the amount of water contained in bodies in water?

OPTIONS:
- they do nothing
- fissures of hot, acidic water
- they make it increase
- they make it decrease
- forest is destroyed
- Damages them
- they displace all water
- move to different locations

Answer:
they make it increase