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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