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Chapter 4 National Geographic Book
Chapter 4
25
Science
3rd Grade
01/21/2014

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Cards

Term
Gravity
Definition
A force that pulls objects towards each other.
Term
Sun
Definition
The sun is the star that is nearest to Earth
Term
Energy
Definition
The ability to do work or cause a change.
Term
Light
Definition
A kind of energy you can see
Term
Rainbows are formed _______________
Definition
when sunlight bends
Term
White light is made up of _____________
Definition
many colors.
Term
When white sunlight passes through a _______, the different colors separate into a rainbow.
Definition
prism
Term
Just after it rains, tiny drops of ________ act like prisms.
Definition
water
Term
Temperature
Definition
A measure of how hot or cold something is.
Term
When tiny ice pieces bend sunlight, the bending forms a rainbow that looks like a circle around the sun. This is called a ________.
Definition
halo.
Term
When a full circle of light doesn't form, like it does with a halo, it is called a ________.
Definition
sun dog.
Term
Sun dogs often happen with the sun is _____ in the sky.
Definition
low
Term
Transform
Definition
is to change
Term
One of natures most colorful light shows is called an ________.
Definition
aurora.
Term
Aurora's often look like glowing _________________.
Definition
curtains of light.
Term
Auroras happen when the sun's extreme heat produces tiny ___________ particles.
Definition
superhot
Term
Superhot particles crash into Earth's air near the poles and release __________ that transforms into different colors of light.
Definition
energy
Term
__________ happen at night.
Definition
Auroras
Term
___________, ______________, or _____________ happen during the day.
Definition
Rainbows, halos, sun dogs
Term
The _____ ______ produces rainbows, halos, sun dogs, and auroras.
Definition
sun's energy.
Term
The sun's _________ helps keep Earth in orbit around the sun.
Definition
gravity
Term
Sunlight is _______ ________.
Definition
white light.
Term
White light actually contains _________ __________.
Definition
many colors.
Term
Particles in the Earth's air are just the right size to scatter the ________ part of sunlight.
Definition
blue
Term
When sunlight reaches the _____, the particles bounce the blue light all around. All other colors continue on to Earth. That is why the sky looks blue to us.
Definition
air
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