After asking a question, a scientist can form a(n) , which is an idea that may be proved or disproved by an experiment.

When scientists have a question, they form a hypothesis, which is an idea that may be proved or disproved by an experiment.

Hypothesis

Explanation:

A hypothesis is a presumed statement for the cause of natural event, process or phenomena. A hypothesis is developed through assumption. A hypothesis can be tested using experimental procedure in which the data obtain will state whether the stated hypothesis is true or false.

After asking a question related to the natural event, process or phenomena the scientists can frame a hypothesis. It is an idea which can be proved or disproved by the experiment.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.