Sunlight and rain can cause a rainbow, and rain comes from clouds. Given these facts, what can cause a rainbow among the following options: - chemical messengers - desire - heating liquids - dreams - Sunlight and clouds - colors of the spectrum - Water and ice - Electrical energy
Sunlight and clouds

Adult sponges produce eggs and sperm, and sperm and eggs are cells known as gametes. Given these facts, what do adult sponges produce among the following options: - cats - lead - gametes - fertile - Energy - food - worms - white
gametes

Q: Creating wood-free paper does not require cutting down trees, and deforestation happens when people cut down forests or when trees are burned. Given these facts, creating wood-free paper does not require what among the following options: - scarce resources - scientific methods - deforestation - paper processes - new avenues - carbon dioxide - Time and energy - Energy.
A: deforestation

Question: Lakes are formed by precipitation and runoff, and alake is a body of standing water (not moving that is). Given these facts, what is formed by precipitation and runoff among the following options: - a body of standing water - barrel-shaped - Calcium carbonate - storing water - near the shoreline - A solid geometric shape - Something made from fermented ricce - swamp vegetation
Answer: a body of standing water

*Question*
Global warming is when worldwide temperature increases, and mass extinction occurs in the ice age and global warming periods. Given these facts, when worldwide temperature increases, mass what occurs among the following options: - extinction - deforestation - carbon - ice age - living - movement - It decreases - Pollution
**Answer**
extinction

*Question*
Some parasites kill their host, but most do not, and any human is a potential host. Given these facts, what do some parasites kill but most don't among the following options: - people - water - humans - animals - sound waves - goats - fungi - viruses
**Answer**
humans