Earth's Formation
Radioactive Decay
Density
Meteors and Other Planets
Mystery
100
How long ago was the Earth formed?
4.5 BYA
100
What is an isotope?
an atom with the same number of protons but a different number of neutrons
100
How do you find density?
Mass/Volume
100
What "fuel" does our sun run on?
Hydrogen
100
How can radioactive decay be a positive/useful thing for us as a society?
energy source
200
What is the process through which ALL planets are made through called?
Accretion
200
What is a half-life?
the time it takes for half of the nuclei of the atoms of a specific element to decay
200
What is more DENSE? A POUND of feathers or a POUND of bricks?
bricks
200
I am thinking of a number from 1-20. Guess the correct number and get 200 points.
18
200
When scientists are evaluating whether other planets can support life, what are they looking for?
Liquid water
300
Where did all the loose matter come from that would eventually create nebulas?
the Big Bang
300
Caffreynium-255 has a half life of 3 billion years. The daughter isotope to this isotope is lincolnium-202. How old is a rock that contains 12.25% Caffreynium-255?
9 billion years
300
Is oil less or more dense than water? How do you know this?
Oil is LESS dense than water because it floats in water.
300
How can studying meteorites provide evidence to support the nebular theory?
Meteorites contain the same chemical makeup as what we expect to see from the early formation of our solar system
300
Why do humans float in water?
The air in our lungs is less dense than the surrounding water.
400
What caused the nebula to spin and flatten?
Increase in temperature and pressure
400
How long is the half life of C-14?
About 7000 years
400
A cube has a volume of 15 mL and a mass of 45 g. What is the density?
3 g/ml
400
Explain how planets are formed
1. Lumps of matter smash together with heavier pieces in the middle.
2. Increased gravitational pull forms the matter into a ball.
400
What is the most abundant element in the universe?
hydrogen
500
Explain 2 pieces of evidence that support the nebular theory
Younger solar systems, newton's law of gravitation, rock layers, radioactive dating of asteroids
500
Why might scientists care about radioactive decay?
1. To determine the age of items within our universe including planets, fossils, and artifacts
2. To think about the stability of man made elements
3. Energy resource
500
I drop a 55 g cube with a density of 5 g/cm^3 into a beaker of water. What is the volume of this cube?
11 cm^3
500
Name all planets in order
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
500
I am thinking of a number 1-100. The team with the CLOSEST guess wins the 500 points. Make sure every team answers before revealing the answer!
88