science midterm review

Question 1

motion is a change in…

Answer 1

position

Question 2

what is eccentricity

Answer 2

a measurement of how elliptical an orbit is

Question 3

Mars is less massive than Saturn. What can you infer from this fact?

Answer 3

Mars has a weaker gravitational force than Saturn.

Question 4

what is luminosity

Answer 4

how much energy a star produces.

Question 5

Consider two stars (Stars A and B) that both exhibit parallax. If Star A appears to move back and forth by a GREATER amount than Star B, which star is closer to you?

Answer 5

star b

Question 6

Stars that are farther away have what kind of parralax shift compared to those closer to the observer.

Answer 6

smaller

Question 7

occurs when the outward force from the hot core will completely blow away the outer shell of the star

Answer 7

planetary nebula

Question 8

star left at the core of a planetary nebula

Answer 8

white dwarf

Question 9

the earliest stage of a star’s life, where fusion begins

Answer 9

protostar

Question 10

stage when a main sequence star runs out of hydrogen which causes their core to cool and expand because the outward push of heated gases is greater than the inward pull of gravity.

Answer 10

supergiant

Question 11

a red super giant star violently explodes releasing heavy elements such as Iron and Silver.

Answer 11

supernova

Question 12

Light is emitted when electrons

Answer 12

move from a higher energy level to a lower energy level

Question 13

The closer the energy level to the nucleus, the _________ energy is has

Answer 13

less

Question 14

The light bends __ the normal because glass is more dense than air.

Answer 14

towards

Question 15

has no charge

Answer 15

neutrons

Question 16

used to determine the atomic number of an atom

Answer 16

proton

Question 17

sotopes are atoms of the same element that have the same number of __________ but different number of ________

Answer 17

protons, neutrons

Question 18

Depends on the different isotopes of an element and how frequently each occurs

Answer 18

average atomic mass

Question 19

The total number of protons and neutrons in the nucleus of an atom

Answer 19

mass number

Question 20

Carbon-12 and Carbon-14 are two isotopes of a Carbon atom. Which of the following is DIFFERENT about these two atoms?

Answer 20

mass number, number of neutrons

Question 21

Carbon-12 and Carbon-14 are two isotopes of a Carbon atom. Which of the following is the SAME for these two atoms?

Answer 21

atomic number
number of protons
number of electrons
name