Question

1. A scientific hypothesis is a method in science where scientists are in the process of trying to prove or disprove a phenomenon.
a. True

b. False

2. What energy source is Earth using primarily for its internal processes?
a. Ancient asteroid impact
b. The core
c. Radioactive decay
d. The Sun

3. The element most abundant in Earth's core is:
a. Calcium
b. Iron
c. Chlorine
d. Silicon
e. Oxygen

4. The asthenosphere is defined as a __________.
a. Rocky layer having a relatively uniform chemical composition.
b. Rigid layer of crustal and mantle material.
c. Rocky layer composed mainly of crustal rocks.
d. Plastic layer composed mainly of mantle material.
e. Tsunami zone

5. The least dense layer of Earth is the __________.
a. Crust
b. Inner core
c. Outer core
d. Mantle
e. Low velocity zone

6. The layer that sits directly under the outer core is called:
a. Lithosphere
b. Mantle
c. Asthenosphere
d. Inner core
e. Mesosphere

7. The youngest rocks of the seafloor are found at the mid-ocean ridges of the world.
a. True

b. False

8. What type of plate boundary is located at the mid-Atlantic Ridge?
a. Divergent boundary
b. Convergent boundary
c. Transform boundary
d. There is no plate boundary

9. What type of plate boundary does the San Francisco Bay Area sit on?
a. Divergent boundary
b. Convergent boundary
c. Transform boundary
d. There is no plate boundary

10. What type of plate boundary is found off the coast of Northernmost California, Oregon and Washington State?
a. Divergent boundary
b. Convergent boundary
c. Transform boundary
d. There is no plate boundary

Answer 1

1ans. False

Scientists hypotheses is an Idea that developed before any experiment or test. this is mainly devloped on the basis of observation so we can't say that it is process of prove and disapprove any phenomena because to prove or disapprove any phenomena we have to do experiment which may be differ from hypothesis.

2ans (c) radioactive decay

Radioactive decay provide internal source of heat for earth and which is responsible fo any internal processes.

3ans (b) iron

4ans (d) plastic layer composed mainly of mantle materia

Asthenosphere is uper layer of earth mantle and just below the lithosphere which is mostly comprising in the form of liquid or plastic form.

5ans (a) core

Core is least dense layer of earth

6ans ( d) inner core

7 ans . true

Mid ocean of sea have youngest Rock because of divergent plate boundary found in mid oceanic ridge

8ans (a) divergent plate boundary

In the mid of the ocean always divergent plate boundary found

9ans (c ) transform boundary

10 ans (d) there is no plate boundary