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Flashcards in Preview Terms Deck (16):
1

Gravity

The force of attraction that is between two bodies and is generated by their masses

1

Light-year (ly)

Unit of distance = to the distance light trael in one year which is about 6 trillon miles

1

Neutrino

Created by the sun and other stars as they fuse hydrogen into helium, and also by supernova explosions

1

Neutrons

Particle wwith no electric charge, but has the same mass as a proton

2

Protons

Postively charged particle inside the Nucleus

3

Nucleus

Core of the atom and it is positively charged

5

Atom

Consists of a nucleus and orbiting electrons and is the smallest unit of a chemical element

6

Electron

Negatively charged particle that orbits the atomic nucleus

8

Dark Matter

Emits no detectable radiation but whose presence can be deduced by its gravitational attraction on other bodies

9

Electric Charge

Charge that causes property of objects to either attract or repel one another. Same sign repel and different signs attract

10

Electromagnetic force

Holds electrons to the nucleus of atoms

11

Astronomical Unit (AU)

Ditance basedon the average distance of Earth from the Sun

12

Weak Force

Force responsible for radioactive decay of atoms

13

Dark Energy

Form of energy that causes the expansion of the universe to speed up

15

The Sun

100 times tha dimater of the Earth and more than 300,000 times more massive

16

Strong Force

Force that holds Protons and Neutrons together in the automic nucleus