ELEM 339

What layer of the earth contains molten lava?

• Crust

• Upper Mantle

• Core

• Lower Mantle

The process of wearing down the earth's surface structures:

• Erosion

• Weathering

• Climate

• Ocean Currents

Average weather in a region over many years:

• Meteorologists

• Weather

• Climate

The era in which mammals began flourishing:

• Cenozoic

• Paleozoic

• Precambrian

• Mesozoic

Rocks formed by the cooling and solidification of magma or lava:

• Igneous

• Metamorphic

• Sedimentary

Name the planet: Closest planet to the sun

How long (about) does it take for the earth to rotate around the sun?

• 24 hours

• 365 days

• 60 minutes

What is the smallest structural unit of an organism capable of living independently?

• Nucleus

• Mitochondria

• Atom

• Cells

Membrane-bound, stores DNA, cell control center

• Cytoplasm

• Nucleus

• Cell Membrane

• Mitochondria

Powerhouse of the cell

• Cytoplasm

• Cell Membrane

• Nucleus

• Mitochondria