If abreathing mask is used for keeping aerosols from entering the respiratory system, then what can be used for keeping aerosols from entering the respiratory system? Answer choices: - goggles - hydration - sweating - hydrogen and oxygen - breathing masks - lab coats - layers of fat - gloves
breathing masks

If prehistoric life is preserved in rock when layers of sediment cover the remains over time, then prehistoric life is preserved in rock when what covers the remains over time? Answer choices: - Plant growth is reduced - an amoebae - layers of sediment - single-celled organisms - loose soil - layers of fungus - layers of bone - layers of mucus
layers of sediment

If rain may soak into the ground, becoming groundwater, then what may soak into the ground, becoming groundwater? Answer choices: - h2o - wells - H 2 O - rain - H20 - blood - dust - river
rain