Grade 6 Science Study Guide
Test: Friday, October 9th
TERM
DEFINITION
Nebula
A cloud of ice, dust, and gas
Gravity
A force that every object exerts on
every other object because of their
mass
Geosphere
Earth’s entire solid body; it contains a
thin layer of soil and sediments that
cover a rocky center
Hydrosphere
Water found on Earth
Biosphere
All living organisms on Earth
Atmosphere
Layer of gases surrounding Earth
Frozen water on Earth
Cryosphere
Density
The amount of mass per unit volume
D=m/v
TERM
Mass
Weight
DEFINITION
The amount of matter within a
constant
The sum of the gravitation pull
between two objects
Makes up all matter
Atoms
Particles that make up atoms
Protons, neutrons, electrons
Objects made up of atoms
Matter
Sphere
System
A ball shape with all points on its
surface at an equal distance from the
center
A group of related objects or parts
that work together to form a whole
Important facts to know:
Size and shape of the Earth
The Earth is shaped as a sphere; it has
a bulge around the equator
Early Earth beliefs
People believed Earth was a flat disk
with land in the center and water at
the edges
Order of the planets
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Rocky planets
Mercury, Venus, Earth, Mars
Gaseous planets
Jupiter, Saturn, Uranus, Neptune
Earth’s systems
Atmosphere
Hydrosphere
Geosphere
Biosphere
Cryosphere
Types of water found on Earth:
Fresh (lake, pond, river)
Marine (ocean)
Ice (frozen fresh)
Brackish (salt + fresh)
1. The nebula formed
The Big Bang Theory
2. Gravity pulled the particles of
the nebula close together
3. Nebula got smaller and formed
a disk
4. The disk began to turn- our star
formed our sun
5. Material started to clump
together and planets formed
6. The more gravity pulled
particles together
7. Other matter collected to form
objects