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WorksheetsPAW Combined Science Quiz
Total questions: 20
Worksheet time: 14mins
Mitochondria have their own DNA and ribosomes, therefore they are able to make their own (a) .
Movement of Oxygen and Carbon dioxide in and out of the cell is carried out by means
diffusion
osmosis
What do genes do?
make proteins
store energy
create covalent bonds
create hydrogen bonds
In which phase does the DNA copy itself?
interphase
metaphase
anaphase
telophase
In which phase do the chromosomes line up?
prophase
metaphase
anaphase
telophase
In which phase do the chromosomes form?
prophase
metaphase
anaphase
telophase
In which phase do new nuclear membranes form?
prophase
metaphase
anaphase
telophase
Valence electrons are found
in the innermost energy level of an atom
in the middle energy levels of an atom
in the outermost energy levels of an atom
How do covalent bonds form?
By donating and receiving valence electrons between atoms.
Scientists still aren't sure.
Opposite slight charges attract each atom in the compound.
Sharing valence electrons between atoms
What two types of atoms make a covalent bond?
2 Nonmetals
1 Metal and 1 Nonmetal
2 Metals
2 Noble Gases
Ionic Bonds
metal with nonmetal
nonmetal with nonmetal
Atoms are most stable when their outer shell is full or complete.
true
false
Group numbers on the periodic table help us determine
number of valence electrons
state of the element (solid, liquid, gas)
Salt is an example of what?
ionic compound
covalent compound
