Solar system

Question 1

An object that orbits the Sun, has a spherical shape, and has a mass greater than the mass of other objects near it.

Accepted Answer

planet

Question 2

A spherical object orbiting the Sun that has objects of similar mass orbiting nearby or crossing its path.

Accepted Answer

dwarf planet

Question 3

which planet is the solar system's largest?

Accepted Answer

Jupiter

Question 4

Comets form a glowing tail when

Accepted Answer

The Sun's energy changes their ice into a gas

Question 5

size, makeup, and structure like that of Uranus

Accepted Answer

Neptune

Question 6

small, rocky particle that strikes a planet or moon

Accepted Answer

meteorite

Question 7

what keeps planets in orbit around the Sun?

Accepted Answer

the Sun's gravitational force

Question 8

Why is Venus the hottest inner planet

Accepted Answer

It's atmosphere traps a lot of heat

Question 9

streak of light made by a glowing rocky particle moving through Earth's atmpsphere

Accepted Answer

meteor

Question 10

the type of object at the center of the solar system

Accepted Answer

star

Question 11

chunks of rock and ice that orbit the Sun between Mars and Jupiter

Accepted Answer

asteroids

Question 12

the time it takes an object to travel around the Sun

Accepted Answer

period of revolution

Question 13

How is Venus unlike other planets?

Accepted Answer

its period of rotation os longer than its period of revolution

Question 14

all the outer planets are made mostly of

Accepted Answer

gas and liquid around a solid core

Question 15

small, particle that moves through space

Accepted Answer

meteoroid

Question 16

which object lost its designation as a planet in 2006 and is now classified as a dwarf planet

Accepted Answer

Pluto

Question 17

spherical objects made mainly of solid, rocky materials

Accepted Answer

inner planets

Question 18

all the inner planets

Accepted Answer

are rocky and have a solid outer layer

Question 19

why do scientists think that liquid water might have once existed on Mars?

Accepted Answer

Mars's surface has deep gullies on it

Question 20

large spherical objects made primarily of the gases hydrogen and helium

Accepted Answer

outer planets

Question 21

because Mercury's mass is so small, it

Accepted Answer

has no atmosphere

Question 22

depression formed when a meteorite hits Earth

Accepted Answer

impact crater

Question 23

the time it takes an object to spin once

Accepted Answer

period of rotation

Question 24

The outer planets have atmospheres composed mostly by

Accepted Answer

hydrogen and helium

Question 25

which inner planet has the longest period of revolution and why?

Accepted Answer

Venus, because it spins very slowly

Question 26

small, rocky objects that orbit the Sun between Mars and Jupiter

Accepted Answer

asteroids

Question 27

the planets in the solar system are so far apart that scientists measure distances between them in

Accepted Answer

astronomical units

Question 28

has a sideways axis of rotation

Accepted Answer

Uranus

Question 29

Earth is the only planet with a wide variety of life because of its

Accepted Answer

Moderate temperature and liquid water

Question 30

has the most complex ring system

Accepted Answer

Saturn

Question 31

Which planet has a moon larger than the planet Mercury

Accepted Answer

Jupiter, Saturn

Question 32

objects made of gas, dust, and ice

Accepted Answer

comet

Question 33

Has a Great Red Spot and at least 63 moons

Accepted Answer

Jupiter

Question 34

source of short-period comets in the outer parts of the solar system

Accepted Answer

kuiper belt

Solar system

Questions 34

Solar system

Questions 34