What is the Oort Cloud?

A distant sphere of icy objects surrounding the solar system

A rocky ring between Mars and Jupiter

A group of moons around Neptune

What is the difference between a meteor and a meteorite?

A meteor burns in Earth’s atmosphere; a meteorite strikes the ground

Meteors orbit the Sun, meteorites do not

A meteor is ice, a meteorite is rock

What causes a comet’s tail?

Ice vaporizing into gas from the Sun’s energy

How is a comet different from an asteroid?

It is made of dust and ice and has a tail

A naturally formed body that orbits a planet

Which planets are considered Terrestrial (Rocky)?

Jupiter, Saturn, Uranus, Neptune

Which of the following is NOT a requirement for an object to be a planet?

Clear away objects of similar size

A force that pulls objects toward a body’s center

The amount of matter in an object

The pull of gravity on an object

How does distance affect gravity?

Gravity only works at short distances

The path an object moves around another object

Why does Earth orbit the Sun instead of flying off into space?

The pull of the Sun’s gravity and Earth’s inertia balance each other

What is the “habitable zone”?

The distance a planet must be from a star to support liquid water

What makes water an excellent solvent?

It can dissolve many substances

What does Earth’s atmosphere protect us from?

Dangerous cosmic radiation from the Sun

What is the role of the ozone layer?

To filter out harmful ultraviolet (UV) light

What does perihelion mean?

The closest point a planet is to the Sun

The farthest point a planet is from the Sun

The average distance between a planet and the Sun

The speed of a planet’s orbit

What does aphelion mean?

The farthest point a planet is from the Sun

At perihelion , what happens to a planet's orbit?

It moves faster because it is closer to the Sun’s gravity

When Earth is at aphelion , what happens to the speed of its orbit?

Earth moves slower because it is farther from the Sun’s gravity

Earth moves faster because it is farther from the Sun

Earth stops moving until gravity pulls it back

Earth’s speed stays exactly the same all year

Which comparison is correct about Earth’s orbital speeds?

Earth is fastest at perihelion (30.3 km/s) and slowest at aphelion (29.3 km/s)

Earth is fastest at aphelion (29.3 km/s) and slowest at perihelion (30.3 km/s)

Earth moves the same speed at both points (30.0 km/s)

Earth stops at perihelion and restarts at aphelion

Unit 1 Test Review 7.9ABC

Authored by Tronia Tante

Science

7th Grade

NGSS covered

Used 11+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What element makes up 90% of the Sun's mass?

Carbon

Helium

Oxygen

Hydrogen

Earth's orbit and rotation are in the SAME direction

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The Sun does not have more of a gravitational pull on the Earth than the Moon.

True

False

Rocky planets have ____ moons than Gas planets.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Gas planets have ____ moons than Rocky planets.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Moons are made of rock, some are covered in ice and have craters.

True

False

WHen comets orbit closer to the sun, they develop a ____?

stripe

roll

squiggle

tail

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Unit 1 Test Review 7.9ABC

What element makes up 90% of the Sun's mass?

Earth's orbit and rotation are in the SAME direction

The Sun does not have more of a gravitational pull on the Earth than the Moon.

Rocky planets have ____ moons than Gas planets.

Gas planets have ____ moons than Rocky planets.

Moons are made of rock, some are covered in ice and have craters.

WHen comets orbit closer to the sun, they develop a ____?

Where is the Kuiper Belt?

The Asteroid Belt is in between what 2 planets?

Where is a meteor found?

Access all questions and much more by creating a free account

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