Fact 1: Temperature changing can cause phase changes. Fact 2: Temperature is the relative degree of heat or cold. Given the two facts above, answer the question "What can cause phase changes?" with the following options: - sweating - constant temperatures - heat or cold - global warming - observation - climate - scattered light - nothing
heat or cold

Fact 1: Acactus stem is used for storing water. Fact 2: Moisture is stored in the spongy stem or root systems of the cactus during rainfall. Given the two facts above, answer the question "What is a cactus stem used to reserve?" with the following options: - dishwater - ocean water - Water - hydration - moisture - cactus fruit - nutrients - moist towels
moisture

Q: Fact 1: When light enters the eye through the pupil , that light falls on the retina. Fact 2: Light is the visible form of electromagnetic energy. Given the two facts above, answer the question "What goes to the retina upon entering the eye?" with the following options: - sensory neurons - Your sensory system picks it up - sound energy - an electron microscope - electromagnetic energy - vibrations - Electrical energy - heat waves
A: electromagnetic energy

Question: Fact 1: Scraping oneself on a contaminated object may cause infection. Fact 2: An infection is an invasion of the body by bacteria. Given the two facts above, answer the question "Scraping oneself on a contaminated object may cause an invasion of the body by what?" with the following options: - amoebae - bacteria - blood - dogs - disease - horses - toxins - fish
Answer: bacteria

*Question*
Fact 1: Chemical weathering causes iron in rock to oxidize. Fact 2: When iron oxidizes, it rusts. Given the two facts above, answer the question "What causes iron to rust?" with the following options: - Chemical energy - High pressure - harmful substances - Greenhouse gasses - permineralization - Chemical weathering - Cold temperatures - Direct heat
**Answer**
Chemical weathering

*Question*
Fact 1: Corals form large colonies in shallow tropical water. Fact 2: Coral reefs are made up of the accumulated exoskeletons of the coral polyp. Given the two facts above, answer the question "What forms in shallow tropical water?" with the following options: - blobfish - sub-units of species - accumulated exoskeletons - aqueous solution - polar bears - an area swollen with pus - swamp vegetation - deep-sea dwellers
**Answer**
accumulated exoskeletons