Question | Answer |
Define Atoms | Make up Matter |
Define Electron | Found outside nucleus, have negative charge |
Define Proton | Found inside nucleus, have positive charge |
Define Neutron | Found inside nucleus, have no charge |
Define Element | Made up of one type of Atom |
Define Molecule | Atoms of the same element bonded together
i.e) O2 |
Define Compound | Made up of two or more different elements that combine chemically
i.e) H20-water; CO2; CO |
Define Mixture | Made of substances that combine physically
Can be solids, liquids or gases or combinations of both
i.e) sand and baking soda; chocolate chip ice cream |
Explain the difference between inorganic and organic compounds | Organic) Contains carbon
Inorganic) Does not contain carbon |
Explain the difference between a solution and a suspension | Solution) two or more substances are combined evenly
Suspensions) gas or liquid has another substance evenly spread throughout it |
Explain why blood is a suspension | Blood cells can sink to the bottom without being "mixed" by circulation of blood flow. |
What are the three reasons water is important? | living things are made of more than 50% water
needed for chemical reactions to occur
used to transport materials throughout the organism |
Define carbohydrates | supply energy for cell process
made up of sugar and starches-like glucose |
What are the three characteristics of lipids? | fats and oils; do not mix with water
release a larger amount of energy than carbohydrates; harder to break down
found in cell membranes; make cell membrane selectively permeable b/c fats and oils do not mix with water |
Since lipids have more energy stored in their bonds why does the body get more use-able energy from carbohydrates | your body converts them to glucose and your body runs on glucose |
What are proteins made of? | amino acids |
What are the two uses or proteins in the body? | make up many structures like muscle
make up enzymes |
What are nucleic acids? | store coded information for cells in DNA |
Define DNA and where it is located in the cell | deoxyribonucleic acid
nucleus |
Define enzymes | regulate all chemical reactions in cell, can speed up the rate of a reaction
proteins |
Explain why mitochondria are important | Break down cristae into energy |