input: OPTIONS:
- Light
- Energy.
- fire
- waves
- heat
- energy
- gas
- LEDs Now, answer this question: Fact 1: Afirecracker converts chemical energy into sound. Fact 2: Particularly interesting waves are sound waves . Given the two facts above, what does a firecracker convert chemical energy into?
A:
output: waves

Fact 1: Acavern is formed by carbonic acid in groundwater seeping through rock and dissolving limestone. Fact 2: Underground caves and caverns pose an exciting adventure to many. Given the two facts above, what can be formed by carbonic acid in groundwater seeping through rock and dissolving limestone?

OPTIONS:
- water
- swamp vegetation
- Calcium carbonate
- sunlight
- contamination
- loose soil
- underground caves
- arsenic

Answer: underground caves

Problem: OPTIONS:
- rocks
- hats
- DNA
- oxygen
- genes
- Heat
- food
- rain forest
Q: Fact 1: An organism requires energy for growth. Fact 2: Because food contains energy. Given the two facts above, what do organisms require for growth?
Answer: food

Problem:OPTIONS:
- tiny polyps
- gene flow
- h2o
- grass
- subtropical
- humans
- Tropical
- perennials

Fact 1: When a plant grows , the size of the leaves of that plant may increase. Fact 2: Perennial types are planted outside in spring. Given the two facts above, what may have its leaf size increase as it grows?
****
A: perennials

Fact 1: Antibodies are large, Y-shaped proteins that recognize and bind to antigens. Fact 2: Allergic reactions are caused by substances called antigens. Given the two facts above, allergic reactions can be caused by?
OPTIONS:
- animals
- smoking pipes
- Sulfur dioxide
- Chemical energy
- fur and fat
- antibodies
- smoking tobacco
- Pesticides
antibodies

Fact 1: Minerals are chemical elements that are essential for body processes. Fact 2: Copper is an essential mineral. Given the two facts above, what is a chemical element that is essential for body processes?
OPTIONS:
- Energy.
- water
- blood
- Energy
- sodium
- copper
- positive
- ice

Answer:
copper