Water Density
Rank these states of matter from most compact molecules to the least compact molecules.
Liquid, Gas, Solid
1. Solid
2. Liquid
3. Gas
What elements does water contain?
Hydrogen and Oxygen
Proper handwashing removes what?
anything of the following: (What is) germs, dust, bacteria, dirt.
(T/F) The human body is home to a large amount of bacteria.
(What is) True
What is Surface Tension?
(What is) the Water's surface is so strong it can even support paper clips and needles.
(T/F) Heating water slows down water particles and cooling water speeds up water particles.
(What is) False
(T/F) Water expands when it is frozen, making it float on it's liquid form.
True
What are some germs that can cause infection?(Name one on the list?)
(What is) Influenza, common colds, E. coli, Pneumonia.
What are some ways that bacteria can spread besides just touching surfaces?
(What is) Saliva or mucus when coughing and sneezing, or shared beverages
What animal lives and depends on surface tension?
What are Water Striders.
What are the two forces that drives currents?
(What is) Wind and Ocean Density differences
Water is constantly evaporating from out skin, is this a good thing? What is the evaporating water doing for us?
(What is) yes, evaporating water is an essential part of life. It happens because water is leaving our system as sweat, and cooling us down.
Soap molecules remove what? (Name two things)
Oil, dirt, and germs
What is our Nasal passages and trachea line with that catches these tiny pathogens?
(What are) tiny hairs.
When water appears to defy gravity by "walking" up a piece of yarn at an angle to the ground, what is this called?
What happens to the water's density when you add salt?
(What is) increasing density.
Sugar is electorally charged, making it ________ molecule?
What is Polar?
How long can germs live for?
(What is) A few minutes to 48 hours
What are some preventative measures that we should take to avoid getting sick?
(What is) Sneezing and coughing into your arm, washing hands frequently, avoid sharing beverages, staying home when sick, drink plenty of water, get enough sleep, eating balanced meals and snacks, physical activity.
What is Cohesion?
The attraction between water molecules.
What is Global thermohaline circulation sometimes characterized as?
The great ocean conveyor belt. It takes warm, less-dense water and cold, more dense water and causes them to move in opposite directions.
Why does sugar dissolve when it is put into water?
(What is) the magnetically charged sugar interacts with a water causing it to dissolve?
How do you properly wash your hands?
(What is) Wash your hands for at least 20 seconds, with warm water and soap. Best practice is to scrub all parts of your hand and under your fingernails.
What is a pathogen?
(What are) harmful viruses, bacteria, parasites, and fungi.
What breaks surface tension?
What is Soap