Heat can change the state of matter, and matter exists in a solid, liquid or gas state and can change forms. Given these facts, _ can change liquid to gas. among the following options: - magnetism - cycles - energy - vapors - condensation - gravity - thirst - Heat
Heat

Courtship is behavior that is intended to attract a mate, and food to survive, mates to reproduce, and water to drink. Given these facts, courtship is behavior that is intended to among the following options: - protect them - reproduce - compete - animals - communicate - humans - offspring - pollinate
reproduce

Q: Viruses often infect bacteria, and antibiotics kill the good bacteria along with the bad bacteria. Given these facts, viruses often infect something killed by what among the following options: - Rocks - Antibiotics - radiation - Needle - Water - Pesticides - sun's heat - Cooking
A: Antibiotics

Question: Many corals secrete an exoskeleton that builds up to become a coral reef, and hard corals build by secreting calcium carbonate skeletons. Given these facts, what constructs an exoskeleton using calcium carbonate among the following options: - animals - amoeba - sharks - insects - mammals - Man - coral - bats
Answer: coral

*Question*
Carbon may be stored in sedimentary rock for millions of years, and limestone is a type of sedimentary rock. Given these facts, what can carbon be stored in for millions of years among the following options: - limestone - fossil fuels - hydrocarbons - graptolites - fish - humans - h2o - layers of fat
**Answer**
limestone

Melting means changing from a solid into a liquid by adding heat energy, and melting is a phase change. Given these facts, what changes a solid into a liquid using heat energy among the following options: - electricity - It gets heated up - boiling - aqueous solution - a phase change - a hydraulic system - heating liquids - Water expanding
a phase change