Q: Fact 1: Amphibians are the first true tetrapods, or vertebrates with four limbs. Fact 2: Frogs are amphibians and ducks are aves. Given the two facts above, the first true tetrapods, or vertebrates with four limbs include? | OPTIONS:
- Schwinn
- frogs
- Man
- insects
- mammals
- bats
- Birds
- feet
A: frogs

Q: Fact 1: Photosynthesis means producers convert from carbon dioxide, water, and solar energy into carbohydrates for themselves. Fact 2: Photosynthetic plants convert solar energy to chemical bond energy in carbohydrates. Given the two facts above, photosynthesis converts solar energy into what for themselves? | OPTIONS:
- Greenhouse gases
- peachleaf willow
- chemical messengers
- Organic compounds
- basic building blocks of life
- chemical bond energy
- one celled organisms
- rays or beams
A: chemical bond energy

Q: Fact 1: Using a gasoline engine requires burning gasoline. Fact 2: Gasoline and flammable liquid related burns, however, are a preventable problem. Given the two facts above, using an what requires burning flammable liquid? | OPTIONS:
- light bulb
- engine
- toaster
- Decibels
- cigars
- barrel
- Cooking
- battery
A: engine

Q: Fact 1: Fossils are formed when layers of sediment cover the remains of organisms over time. Fact 2: Natural gas is a fossil fuel. Given the two facts above, what is formed from layers of sediment covering the remains of organisms over time? | OPTIONS:
- metal
- cold
- rings
- coral reef
- sea urchins
- natural gas
- exoskeleton
- shells
A: natural gas