8th Grade Science

Question 1

How was the Solar System Formed?

Answer 1

A cloud of dust and gasses started to be pulled together and rotate. Over time the dust and gasses flattened into a disk where the sun formed in the middle. As the remaining gasses and dust ran into each other they formed the planets.

Question 2

What Materials Formed Earth

Answer 2

Gasses+Dust+Dense Rocks+Metals

Question 3

Describe the Sources of Energy in Earths Interior

Answer 3

Collision of Particles
Radioactive decay
Gravitational potential energy

Question 4

How did Earths Layers Form

Answer 4

During Earth’s molten faze, larger denser rocks and materials were pulled towards the center of the Earth b gravity which pushed the smaller objects towards the top.

Question 5

Earth Compositional Layers (what they’re made of)

Answer 5

Crust
-Oxygen -Silicone -Aluminum
Mantle
-Magnesium -less silicone -les aluminum
Core
-Iron -nickel

Question 6

Earth’s Physical Layers

Answer 6

Lithosphere
-Solid and brittle
Asthenosphere
-Soft mantle (puddy like)
Mesosphere
-Rocks flow slower than in the asthenosphere
Outer Core
-Liquid
Inner Core
-Solid

Question 7

How do Scientist Detect Seismic Waves?

Answer 7

By using seismographs which can detect the seismic waves that earthquakes produce.

Question 8

What is the Difference Between S waves and P waves

Answer 8

S waves- cause damage to buildings and are transversal waves
P waves- don’t cause damage and are compressional waves.