*Question*
Brain cells die quickly if their oxygen supply is cut off, and air contains oxygen. Given these facts, what happens to brain cells when the air supply is cut off among the following options: - strangulation - breathe - lead poisoning - death - hippocampus - painful - loss - die
**Answer**
death

*Question*
Harming an animal species has a negative impact on the population size of that species, and animals are harmed because of cosmetic testing. Given these facts, what has a negative impact on the population size of a species among the following options: - Pesticides - influenza - steroids - liver cancer - cloudy and rainy weather - massive damage - cosmetic testing - killing insects
**Answer**
cosmetic testing

*Question*
If an object is black then that object absorbs all visible light, and light is made of photons . Given these facts, if an object absorbs all photons then that object among the following options: - is reflective - is black - Energy. - heat energy - inactive - moves - is transparent - is flexible
**Answer**
is black

*Question*
Dew is formed when water vapor condenses over night, and if the cooling is sufficient, water vapor condenses into clouds. Given these facts, dew is formed when _ occurs over night among the following options: - cooling - imbalanced - rain - storms - warm - boiling - a solute - Joules
**Answer**
cooling