Which of the following is not a process that forms metallic ore?

Question

placer deposits ***
fossil compaction
hydrothermal solutions
igneous processes

5. Which of the following nonmetallic mineral resources is used both as a building material and as an industrial mineral?

sulfur
limestone
graphite ***
corundum

6. What is one of the drawbacks to the extensive use of solar energy?

It is nonrenewable.
Necessary equipment and installation are expensive. ***
It is available only at night.
Its use produces pollution.

7. How does nuclear fission produce energy?
Moving water turns turbines to produce electricity.
A controlled nuclear chain reaction produces heat, driving steam turbines to produce energy.
An uncontrolled nuclear reaction produces heat, driving steam turbines to produce energy. ***
Carbon atoms are bombarded by neutrons.

8. Hydroelectric power is produced by ____.
falling water that turns a turbine ***
tides that pour through a dam barrier
hot water that comes from deep underground
electric current that flows across a dam

Answer 1

You don't need to post twice. I answered the best I can above. Be patient. Tutors are volunteers and not glued to this screen. Someone will get to you when possible. Sometimes questions don't receive an answer because no tutor is qualified to answer, but we answer those we can.

Answer 2

Well, it's a year later and nobody did soooo :/
@reed

Answer 3

I know right, another year later no ones answered.

Answer 4

Stop being jerks... Grow up and get a life.....jeez.....

Answer 5

@anonymous I know right LMFAOO

Answer 6

here are the answers for the first few!

1. C
2. D
3. A