Biology- Chemistry of life

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40 Terms
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What are atoms?
They are smallest thing in the universe, everything is made of them, have different sizes, weights, and characteristics.
What are multiple atoms linked together?
Multiple atoms linked together are molecules, such as
What are Molecules?
Multiple atoms linked together, can be from 2 to 100s of atoms large, nitrogen, oxygen, carbon
Examples of Molecules
Nitrogen, Oxygen, Carbon and Hydrogen
LT.1 What are atoms and molecules and what are some examples?
Atoms are the smallest thing in the universe, make up everything, multiple atoms linked together is a molecule, some examples of molecules are nitrogen, carbon, oxygen, and hydrogen.
LT.2 How can we know whether a food is safe to put in our body, Consider ingredients, FDA approval status, USDA, GMO, or organic?
LT.3 We say we eat food for energy, what does this mean?
LT.4 How do we ensure that we have the right amount of macromolecules we need in our diet? Why is this important? Include descriptions of why their important.
LT.5 If the water cycle constantly renews sources of water, than how do we have water shortage and crises around the world?
Nucleic Acids (DNA)
Genetic information for all cells, In all plant/animal based food.
Fast fuel/short term energy, Sugars are simple carbs, refrined grains, sugar food and drinks, milk and fruit. Starches and Fiber Complex Carbs, whole grains, many fruits, and veggies, beans.
Lipids (fats)
Long term energy, (stored and reserve energy), Not all bad, food examples are, Butter, oils, nuts, avocado, fatty meats, and dairy.
Building blocks for muscles, hormones, enzymes etc. NOT ENERGY. Food examples are, Eggs, Meats, Nuts, Beans and Some Dairy.
Fats, Calorie Equation
___ g/serving x 9 Cal/g x ___ servings = total fat calories
Carbs, Calorie Equation
___ g/serving x 4 Cal/g x ___ servings = total carb calories
Proteins, Calorie Equation
___ g/serving x 4 Cal/g x ___ servings = total protein calories
Why We Eat PT.1
Carbohydrates, lipids, and proteins contain the parts for our cells (molecules).
Why We Eat PT.2
Carbohydrates and lipids provide energy (proteins only as last resort)
What are Calories
Calories are a measure of how much energy your body can make out of the food you eat (kcals=Calories)
Why we eat and drink water?
Water is a necessity to keep our cells alive, and keep us from being dehydrated, and producing waste.
What make water so special?
Water is a Polar Molecule
knowt flashcard image
What molecules make up water?
2 Hydrogen's and 1 Oxygen. Hydrogen has more of a positive charge on water and the oxygen has a negative charge.
Water has two differently charged ends, like a magnet. The opposites attract, the 1 Oxygen attracts to the 2 Hydrogen Molecules. And the sticking together of the Polar Molecules is called Hydrogen Bonding
The Water Cycle
The Water Cycle, moves water around the earth in different cycles, in different forms such as, Solid's, Liquids, and Gas
Is when liquid water turns to vapor (gas) because of heat
Is gas turning to liquid; where clouds come from
Is water falling to the ground (snow, rain, etc)
When water goes down hill; causes erosion
Is water collecting together on land, like ice caps or oceans
When water soaks into the ground, and then accumulates
Groundwater is taken up through plant roots and evaporates out of leaves
3 states of matter
Solid, liquid, and gas, found abundantly all over earth
water molecules stick to each other and create surface tension, ex co pilot and pilot, togetherness
Water molecules stick to other things, ex water climbs up tree, plant steam
polar and hydrogen bonding
water has two differently charged ends and the opposites attract, 1 oxygen is attracted to 2 hydrogen
great solvent
many things dissolve in water better than other liquids
high specific heat
water can absorb a lot of energy before it changes tempature; must release a lot of energy to cool down
water is less dense as a solid and every other substance is opposite
water crisis- ethiopia
lack of water, droughts, have to dig/mine for water, travel for water in dangerous places, usually send kids and they get bullied, usually contaminated and makes you sick
water crisis- kenya
they dont have clean/safe areas to go to bathroom and dispose of their waste, and if they do the water goes straight in the river, which is where the water supply comes from, some guy tested out a toilet that disposes the waste in a safe way and tested it on the rich and then rolled it out to the lower clases in a central location, costs 3 cents per use and is a great long term investment for the country of kenya to clean their country up so people dont dispose of human waste on the streets