Study Guide for Science Test #2

What is the difference between a meteor (commonly misidentified as a shooting star) and a meteorite?

• A meteor is the visible streak of light in the sky, while a meteorite is a fragment that reaches the Earth's surface.

• A meteor is still in space, while a meteorite is burning up in Earth's atmosphere.

• They are the same and refer to any object entering the Earth's atmosphere.

• Meteors exist only in space, and meteorites exist only on the Moon.

A small, irregularly shaped rocky object that orbits the Sun is called a ________________. Most of them are located between Mars and ________________.

• asteroid, Jupiter

• comet, Venus

• meteor, Saturn

• planet, Earth

These objects are sometimes called dirty snowballs (bolas de nieve sucias) and are made of ice, rock, and dust. These objects orbit the Sun and are called ________________. Most of them come from the Kuiper Belt (Cinturón de Kuiper) or the ____________ cloud.

• Comet, Oort

• Asteroid, Van Allen

• Meteor, Asteroid

• Planet, Kuiper

What is inertia?

• The tendency of an object to resist changes in its state of motion

• The force that makes an object move

• The energy possessed by a moving object

• The ability of an object to attract other objects

5. Inertia and ________________ work together to keep the planets in orbit around the Sun.

• Gravity

• Friction

• Magnetism

• Electricity

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

The force that attracts two objects to each other is called ___________________.

• Gravity

• Friction

• Magnetism

• Electricity

Tags

NGSS.MS-PS2-4

Gravity is affected by the ________________ of objects and the ________________ between them.

• mass, distance

• color, shape

• temperature, volume

• speed, direction

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-2

What is the force that keeps the Moon orbiting the Earth and prevents it from drifting away into space?

• Gravity

• Magnetic force

• Friction

• Electric force

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

Outer planets have more moons than inner planets. Why is this?

• Outer planets have stronger gravity, allowing them to capture more moons.

• Inner planets are closer to the Sun, so they lose moons more easily.

• Outer planets are made of rock, so they attract more moons.

• Inner planets have more rings, so they have fewer moons.

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

Small, rocky, and dense planets that are located closer to the Sun are called ________________ or inner planets.

• Terrestrial planets

• Gas giants

• Dwarf planets

• Ice giants