7th Grade Topic 3 Test

Front

The rock that forms Earth's outer layer: ___________________________

Back

The rock that forms Earth's outer layer is called the crust.

Front

The strong, hard and rigid layer of Earth's crust and upper mantle: ___________________________

Back

Lithosphere

Front

The layer of hot rock beneath the crust, and it extends down to Earth's core: ___________________________

Back

mantle

Front

The layer of molten metal surrounding the inner core. It is liquid and has high pressure: ___________________________

Back

Outer core

Front

The layer of earth that is the dense ball of solid metal:

Back

Inner Core

Front

Scientists believe that Earth's magnetic field is caused by: The movement of tectonic plates, The rotation of the Earth, The flow of molten iron in the Earth's outer core, The gravitational pull of the moon

Back

The flow of molten iron in the Earth's outer core

Front

What 3 processes or forces combine to set convective currents in motion? Options: 1. Heating and cooling of the fluid 2. Changes in the fluid's density 3. Gravity 4. Magnetic fields 5. Wind patterns 6. Ocean currents 7. Earth's rotation 8. Solar radiation 9. Tidal forces 10. Chemical reactions 11. Sound waves 12. Light absorption

Back

Heating and cooling of the fluid, Changes in the fluid's density, Gravity

Front

What are convection currents in Earth?

Back

The movement of tectonic plates due to heat from the Earth's core.

Front

What 5 characteristics define minerals?

Back

1. Naturally occurring
2. Inorganic
3. Solid
4. Definite chemical composition
5. Ordered internal structure

Front

Luster: __________________________

Back

Shiny appearance