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6. what cell only has mitacondria and not ribosomes?
- sperm cell
- plant cell
- yeast cell
- bacterium cell
- animal cell
7. what do mitacondria do?
- they produce dna
- they kill bacteria
- They produce engergy through respiration
- they respirate
8. the difference between a speed and velocity time graph is ...
- velociy needs a directiton
- speed needs a driving force
- velocity needs a force
- speed needs a unit
9. equation for acceleration is ....
- v-t times u
- v-u devided by t
- u-t devided by v
- v-t devided by u
10. what is a compound
- a substance where two or more atoms are chemicly combined
- a mixture of elements
- a group of atoms
11. what type of bond is oxygen?
- double bond
- single bond
- two single bonds
12. when sodium and chlorine are ionicly bonded what do the charges become?
- sodium +1 and chlorine -1
- sodium chloride -1
- sodium -1 chlorine +1
- sodium chloride +1
13. when two elements are ionlcly bonded what do they become?
- chemicly bonded
- atoms
- ions
- ionicly bonded
14. what is the mass of protons, nutrons and electrons?
- protons 1 netrons 0 electrons 1
- protons 1 netrons 1 electrons trace
- protons 2 netrons trace electrons 1
- protons trace netrons 1 electrons 1
15. what is a chemical bond?
- bonding of electrons
- transfering or sharing electrons in the outer most shell or ionic and covalent bonding
- bonding of atoms
16. what is it called when two of the same elements have the same masss numbers?
- a Raine
- an isotope
- the same
- a drouplet