Coal is used for generating heat by burning, and like coal, petroleum is a fossil fuel. Given these facts, what is used for generating heat by burning among the following options: - Calcium carbonate - carbon dioxide - fossil fuels - clouds - peachleaf willow - space - calcite - sunlight
fossil fuels

(Question)
Many corals secrete an exoskeleton that builds up to become a coral reef, and coral is calcium carbonate with a trade of carotene. Given these facts, a reef is made of among the following options: - it keeps an organism warm - salt and water. - granite - magnesium - gastropod shells - ocean water - calcium carbonate - zinc
(Answer)
calcium carbonate

Ques: Some precipitation that falls on land may soak into the ground, becoming groundwater, and stagnant water is often a breeding ground for mosquitoes. Given these facts, some precipitation that falls on land may soak in, becoming a breeding place for what among the following options: - mosquitoes - bioaerosols - animals - alpacas - bats - rabbits - fleas - insects
Ans: mosquitoes

(Q).
If a habitat can no longer support animals then those animals will move to another area, and often habitat is destroyed for agriculture. Given these facts, what happen in animals' home area that can result in animals moving to another area among the following options: - removal of predators - increased food - deforestation - colder weather - better shelter - Pollution - storms - agriculture
(A).
agriculture

Ques:Loud noises can cause animals to startle, and an injured animal can be very dangerous. Given these facts, what can loud noises be among the following options: - a chime - kinetic - sound - supersonic - mechanical - Pollution - dangerous - threatened

Ans:dangerous

Cancer is a disease in which cells divide out of control, and cancer is a family of diseases that is characterized by cells that replicate too rapidly. Given these facts, cancer is characterized by cells doing what out of control among the following options: - massive damage - smoking tobacco - destroying - replicating - Localized damage - failing - disappearing - Smoking
replicating