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Horizontal row of elements in the periodic table whose properties change gradually and predictably.
Vertical column of elements in the periodic table that have similar physical or chemical properties.
Some scientists believe in the Big Bang Theory because they can see the red shift, which shows galaxies are moving ______ from each other.
When two forces are acting on an object in OPPOSITE directions, you ______ them. The larger force will "win", and the object will accelerate in the direction of that force.
If one force is acting on an object in a horizontal direction and another force is acting on the object in a vertical direction, the object will end up being pushed _________.
Burning, changing temperature, and giving off bubbles are all indicators of a _________ change.
In the rock cycle, igneous rock slowly weathers and erodes, breaking down into ___________.
In the water cycle, this happens when water molecules in the air come together to form clouds.
In the water cycle, this happens when liquid water molecules turn into gas and enter the atmosphere.
When the Earth's axis is tilted away from the Sun, it is ___________ in the northern hemisphere.
When the Earth's axis is tilted toward the Sun, it is ___________ in the northern hemisphere.
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