Echinoderms lack respiratory and excretory systems, and all echinoderms are marine and benthic. Given these facts, what creatures lack respiratory and excretory systems among the following options: - Plant growth is reduced - marine and benthic - barnacles - epidermis and dermis - They may not survive. - kalenchoes - graptolites - movement of tectonic plates
marine and benthic

Hydrogen bonds cause water to expand when it freezes, and ice is frozen water. Given these facts, what causes ice to expand as it is formed among the following options: - precipitation - water - Physical weathering - sunlight - music - Condensation - heat produced - hydrogen bonds
hydrogen bonds

Q: The Earth revolving around the Sun causes the seasons to change on its axis, and weather changes from season to season. Given these facts, what causes weather to change among the following options: - wind and erosion - Earth revolving around the sun - degrees Celsius - exposure to cold - Colder temperatures on Mars - Forecasting sunny weather - pressure differences. - Performing a rain dance
A: Earth revolving around the sun

Question: Evaporation of sweat uses energy, and the energy comes from body heat, and when sweat comes in contact with the skin it is cooled as the sweat evaporates. Given these facts, energy leaves from what when sweat contacts with skin among the following options: - radiation - heat energy - expelled - vapors - body heat - heat produced - conduction - metal
Answer: body heat

*Question*
Animals may compete for territory, water, food, or mates, and all cats are animals. Given these facts, what may compete for territory, water, food, or mates among the following options: - koalas - bears - plants - Birds - gravity - atoms - humans - cats
**Answer**
cats

(Question)
Breaking apart rocks can cause debris, and erosion is the breaking apart and moving of rocks and soil. Given these facts, what can break rocks and cause debris among the following options: - sand - trees - erosion - wind - Surf - Earthworms - flooding - rivers
(Answer)
erosion