ENV Midterm Review 24-25

The atomic number is equal to the number of

• protons

• neutrons

• ions

• isotopes

If the number of neutrons in an atom were to change, this atom would be referred to as

• a neutral atom

• an ion

• a charged atom

• an isotope

The center of the atom is called the

• Proton

• Neutron

• Nucleus

• Electron

What is the composition of the earth's inner core?

• solid iron and nickel

• liquid iron and nickel

• oxygen and silicon

• solid iron and silicon

The magnetosphere that surrounds the earth is actually generated from this layer of the earth.

• inner core

• outer core

• mantle

• crust

The inner core of the earth is kept solid due to

• plasticity

• high temperature

• low temperature

• high pressure

Convection currents in this layer help to move tectonic plates.

• the mantle

• the moho

• the inner core

• the outer core

When increasing depth towards the center of the earth, temperature, density, and pressure

• all decrease

• all increase

• all increase and then start to decrease at the core

• all decrease and then start to increase at the core

The most abundant elements found in the crust of the earth are

• solid iron and nickel

• liquid iron and nickel

• magnesium and silicon

• oxygen and silicon

The main objection to Wegner's hypothesis of continental drift

• he could not provide any evidence for his theory

• most scientist considered him to be crazy

• most scientists believed the changes in continental coastlines were caused by wind and erosion

• he could not provide a mechanism for the plate movement