Chemistry
What are lipids?
fat or oil
What are elements?
they are all the same type of an atom
What is one goal of science?
nature can be understood, scientific ideas are open to revision, sound scientific ideas withstand the test of time, cannot provide answers to questions
What are chemical reactions?
change of one substance into another; you have reactions and products
What is the chemical name?
H20
What is a compound?
two or more elements bonded together
Where can you find carbon-based molecules?
carbohydrates, lipids, proteins, nucleic acids
What is the scientific law?
somethings cannot be changed like law of gravity, gas law and certain natural conditions
You can create or destroy matter, right or false?
false - you cannot create matter or destroy it under normal conditions
water cannot be solid, liquid and a gas on the earth, right or false?
false - water can be solid, liquid and gas
What does steroids?
serve as chemical messengers and have lot more roles
For what are you using carbohydrates (sugar, starch)?
store energy
How many steps has the scientific method and which one?
1. observation (2. question), 3. hypothesis, 4. experiment (5. analysis), 6. result/conclusion
What happen when you have an exothermic reaction?
energy is emitted during the reaction and goes away into the air or something like this (exothermic like your ex boyfriend it goes away)
What are hydrogen bonds?
water stays liquid even though you haven't room temperature
How many types does lipids have and what are their names?
3- triglycerides, phospholipids, steriods
How do you call a chain of multiple sugars?
polysaccharides
If you change the temperature in an experiment for a few flowers, is it a dependent variable or an independent variable?
independent variable
What do you call the energy you need to start a chemical reaction?
activation energy
You have a pH of 4, is it a acid or a base and why?
acid, because acids have a pH value between 0-7.
What are the chains from nucleics acids called?
polynucleotides
What is the different between saturated fatty acids and unsaturated fatty acids?
saturated fatty acids: normally solid, in animals, straight chains, hydrogen's
unsaturated fatty acids: carbons, bent/curved shape, in plants, normally liquid
What is the the constant when the experimenter only change the temperature of water and not the amounts of water for the flowers?
amount of water
How do you call the sum of reactions within an organism?
metabolism
Why is water such a special element?
high boiling point, expands when it freezes, surface tension, excellent solvent, high specific heat