Q: Abreathing mask is used for keeping harmful particles from entering the respiratory system, and aerosols are tiny particles suspended in the air. Given these facts, what can be used for keeping aerosols from entering the respiratory system among the following options: - goggles - hydration - sweating - hydrogen and oxygen - breathing masks - lab coats - layers of fat - gloves
A: breathing masks

Q: Aflashlight requires a source of electricity to produce light, and electric power sources are ordinary batteries. Given these facts, what requires a battery to produce light among the following options: - flashlight - energy - mirror - microscope - direct energy - fire - cactuses - glowworm
A: flashlight

Q: Plastics are made from petroleum and produce toxic waste, and petroleum is a fossil fuel . Given these facts, what is made from fossil fuels among the following options: - renewable resources - Fuel cells - the Sun - water - plastic - emissions - gasoline - cigarettes
A: plastic

Q: Boiling is when liquids are heated above their boiling point, and lots of gas bubbles burst over the boiling lakes' surface. Given these facts, what happens when liquids are heated among the following options: - Evaporation - chemical reaction - air is cooled - food is chilled - It expands - gas bubbles burst - flow of electrons - bubbles reduce
A: gas bubbles burst