Earth and Space Science Review 6th-8th Grade

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when two objects at different temperatures touch each other, allowing heat to flow from the hotter object to the cooler one.

Front

What is the cryosphere?

Back

The cryosphere refers to the frozen water part of the Earth system, including ice caps, glaciers, and sea ice.

Front

What is an astronomical unit (AU)?

Back

An astronomical unit is the average distance between the Earth and the Sun, approximately 93 million miles or 150 million kilometers.

Front

What is a light year?

Back

A light year is the distance that light travels in one year, which is about 5.88 trillion miles or 9.46 trillion kilometers.

Front

What is the hydrosphere?

Back

The hydrosphere encompasses all the water on Earth, including oceans, rivers, lakes, and groundwater.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as light or infrared radiation, and does not require a medium to travel.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What are the layers of the Earth?

Back

The Earth is composed of several layers: the crust (outer layer), mantle (middle layer), outer core (liquid), and inner core (solid).

Front

What is the atmosphere?

Back

The atmosphere is the layer of gases surrounding the Earth, essential for life, and plays a key role in weather and climate.

Front

What is the biosphere?

Back

The biosphere is the global sum of all ecosystems, where life exists, including land, water, and the atmosphere.