In an experiment, the independent variable
a.
always influences the dependent variable
b.
is the same for all groups in an experiment
c.
is influenced by the dependent variable
d.
is manipulated or varied by researchers

Option D

Explanation:

The scientific experiment is based on many steps. The factors on which the result of the experiment depends is the independent variable.

The independent variable can be defined as the factors that can be manipulated in order to get the accept the hypothesis or reject the hypothesis.

The result of the experiment can produce one or more than one result which is a dependent variable.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.