Vocab. Section 2 vocab

Question 1

Mars

Answer 1

The forth closest planet to the Sun. It looks red and is mostly made of iron oxide minerals. Has a similar axis tilt to Earth’s and Seasons. -60 degrees C average.

Question 2

Venus

Answer 2

The second closets to the Sun. Venus’s size is identical to Earth. Has a dense atmosphere and is mostly composed of carbon dioxide.

Question 3

Mercury

Answer 3

The smallest and closest planet to the sun. Mercury is the fastest revolving around the sun. It is covered in craters. Mercury has a weak gravitational pull and has no atmosphere. 430 degrees C- 170 degrees C.

Question 4

Earth

Answer 4

The third closest to the Sun. Earth has water which makes life possible on Earth. Average temperature is 15 degrees C. Has a atmosphere.

Question 5

When was the Solar system formed?

Answer 5

4.6 billion years ago when the nebula collapsed.

Question 6

What were the 6 things that formed when the Solar system was forming?

Answer 6

Planets, Dwarf planets, asteroids, meteoroids, and comets.

Question 7

What are the Inner planets made of?

Answer 7

Inner planets have iron cores surrounded by solid rock.

Planets close to the Sun are made of heavier elements, such as iron, silicon, and oxygen.

Question 8

What is the closest planet to the Sun?

Answer 8

Mercury

Question 9

What is Mercury’s surface like?

Answer 9

Mercury is full of craters.

Question 10

Does Mercury have a atmosphere?

Answer 10

No

Question 11

What is the second closest planet to the Sun?

Answer 11

Venus

Question 12

Is Venus a terrestrial planet?

Answer 12

Yes, Venus s often referred to as Earth’s sister planet because their sizes and masses are almost identical.

Question 13

What is Venus’s atmosphere made of?

Answer 13

Venus’s atmosphere is made of mostly carbon dioxide.

Question 14

What causes Venus to be such a hot planet?

Answer 14

Greenhouse effect, temperatures on the surface of Venus are between 450ºC and 475ºC.

Question 15

What is the third closest planet to the Sun?

Answer 15

Earth

Question 16

What makes Earth different from other planets?

Answer 16

• 1 has water

- 2 has life

Question 17

What Earth’s atmosphere made of?

Answer 17

Earth’s atmosphere is mostly made of 78 percent nitrogen and 21 percent oxygen.

Question 18

What has inspired Scientists to search for live on other planets?

Answer 18

Life has been discovered in extreme environments on Earth.

• These environments include vents on the seafloor, acidic hot springs, and ice in dark, cold polar waters.

Question 19

What is the forth closest planet to the Sun?

Answer 19

Mars

Question 20

What is Mars’s surface made of?

Answer 20

Mars is a red planet because of iron oxide in some of the weathered rocks.
Mars also has polar ice caps, composed of frozen carbon dioxide and frozen water.

Question 21

What did the Global Surveyor, Mars Odyssey, and Mars Pathfinder find out about Mars?

Answer 21

Global Surveyor - Walls of Valles Marineris are similar to the Grand Canyon in Arizona.

Mars Odyssey - Water frost beneath the soil.

Mars Pathfinder - Mar’s crust has iron that may have been leached out by groundwater.