Preview Terms

Question 1

Gravity

Answer 1

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

Question 1

Light-year (ly)

Answer 1

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

Question 1

Neutrino

Answer 1

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

Question 1

Neutrons

Answer 1

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

Question 2

Protons

Answer 2

Postively charged particle inside the Nucleus

Question 3

Nucleus

Answer 3

Core of the atom and it is positively charged

Question 5

Atom

Answer 5

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

Question 6

Electron

Answer 6

Negatively charged particle that orbits the atomic nucleus

Question 8

Dark Matter

Answer 8

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

Question 9

Electric Charge

Answer 9

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

Question 10

Electromagnetic force

Answer 10

Holds electrons to the nucleus of atoms

Question 11

Astronomical Unit (AU)

Answer 11

Ditance basedon the average distance of Earth from the Sun

Question 12

Weak Force

Answer 12

Force responsible for radioactive decay of atoms

Question 13

Dark Energy

Answer 13

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

Question 15

The Sun

Answer 15

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

Question 16

Strong Force

Answer 16

Force that holds Protons and Neutrons together in the automic nucleus