24 terms

Gr 4 Science Unit 7 Patterns in the Sky

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Terms in this set (...)

Shadow
a dark area caused when an object blocks light falling on a surface.
Gravity
The force that pulls objects towards each other
Tides
The rise and fall of the water in
the ocean that is caused by the gravity of the moon
High Tide
The rise of the sea level caused by the gravity of the moon
Low Tide
The fall of the sea level by the gravity of the moon
Moon
A natural satellite that
orbits a planet
Seasons
One of the four natural divisions of the year, spring, summer, fall, and winter, in the Northern and Southern Hemispheres
Revolution
The movement of an object around another
Orbit
The path that one object in space takes around another object in space
Tilt
To slant or lean to one side
Axis
An imaginary line on which a body, such as a planet, can rotate, or turn
Year
The time it takes the Earth or any planet completes a single revolution around the Sun. Earth's year is 365 days
Spring
The season of growth, occurring between winter and summer. The Earth is neither tilted toward or away from the Sun
Summer
The usually warmest season of the year, occurring between spring and fall; the Northern Hemisphere is tilted toward the Sun
Fall/Autumn
The season when the leaves fall from the trees, occurring between Summer and Winter; the Earth is neither tilted toward or away from the Sun
Winter
The usually coldest season of the year, occurring between autumn and spring
Pattern
A design or form that is repeated
Lunar Cycle
The moon's continuous orbit around the earth that takes approximately 29 ½ days
Lunar Eclipse
Earth casting a shadow on the moon
Moon Phases
What the Moon looks like at
Different times of the month
Full Moon
The moon when it is visible as a fully illuminated disk
New Moon
The phase of the moon occurring when it passes between the earth and the sun
First Quarter Moon
The phase of the moon between the new moon and the full moon; the right side of the moon is visible
Third Quarter Moon
The phase of the moon between the full moon and the new moon; the left side of the moon is visible

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