Solar System
How many planets are in our solar system?
There are 8 planets in our solar system
How did gravity help from the Earth?
keeps everything on Earth from floating away
What plates cause most of the movement, causing natural disasters in Africa
convergent boundaries.
What does uranium 238 decay to?
Lead-206
What is the 4th planet in our solar system?
The 4th planet is Mars
How does the Earth's gravity affect the weight of an object on its surface?
any two objects, because of their masses
The Pacific plate is an oceanic tectonic plate.
lies beneath the Pacific Ocean
How many protons, and neutrons does uranium 235 have?
92 protons and 143 neutrons
What planet possibly had water on it at one point?
Mars
How does Gravity affect Earth's atmosphere?
causes the air near the ground to be denser and at a greater pressure than air at higher elevations.
what type of plate, is an oceanic tectonic plate?
make up the ocean floor
What does potassium40 decay to?
calcium-40 ( 40Ca) and argon-40 ( 40Ar).
Name all the planets in our solar system in order.
Mercury, venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
How strong is Earths Gravity?
what plate boundaries cause volcanic activity?
divergent plate boundaries and convergent plate boundaries
What is the origin of potassium 40?
existed in the remnants of dead stars
How long does it take for the Earth to orbit the sun?
365 days
How is Earth's gravity different from that of Mars?
The surface gravity on Mars is less than the surface gravity on Earth.
what are the three types of convergent plate boundaries?
continental-continental, continental-oceanic, and oceanic-oceanic.
What does uranium 235 decay to?
Th-231, Pa-231, actinium-227 (Ac-227), Th-227,Ra-223,Rn-219, Po-215, Pb-211, Bi-211 and thallium-207 (Tl-207).