| A | B |
|---|
| atom | smallest part of an element |
| proton | positive charge |
| neutron | neutral charge |
| electron | negative charge |
| nucleus | contains genetic material of the cell |
| solid | definite shape, definite volume |
| liquid | definite volume, takes shape of the container |
| gas | no definite volume, no definite shape |
| reason an atom is neutrally charged | number of protons = number of electrons |
| plant cells | have a cell wall and chloroplasts |
| cell membrane | protects the cell and regulates incoming and outgoing |
| physical property | shape, state, color, size, density |
| chemical property | reactivity |
| cytoplasm | gelatinlike substance that holds organelles |
| cell wall | gives support and protection to plant cells |
| chloroplasts | convert sunlight into energy for plants |
| grow, reproduce, use energy, respond to stimuli | characteristics of living things |
| hypothesis | educated guess |
| variable | what will change in an experiment |
| formula for density | D = M/V |
| Density of water | 1.0 g/cm3 |
| object will sink if | density is more than 1.0 g/cm3 |
| object will float if | density is less than 1.0 g/cm3 |
| unit for length | centimeter or cm |
| unit for mass | gram or g |
| unit for density | gram per centimeter cubed or g/cm3 |
| unit for temperature | degrees Centigrade or C |
