Motion
The speed and direction of an object’s movement
What is velocity?
a push or pull that one object exerts on another
What is force?
Bending a sheet of steel to make into a new shape is an example of _____.
What is forming?
Tides on Earth are caused mostly by
What is the Moon's gravitational pull (or gravity)?
While the inner planets are made up mostly of rocky material, the outer planets are made up mostly of
What are gases?
The lowest point on a wave
What is the trough?
The cause of surface currents
What is the wind?
Where most chemical digestion happens
What is the small intestine?
A place or object used for comparison to determine if something is in motion
What is reference point?
When several forces act on an object, and the object has no change in motion, the forces are combining to form a
What is balanced force?
Any tool that requires only muscle power to work
What is a hand tool?
The Moon is ___________ when the visible portion of it becomes smaller
What is waning?
A "shooting star," or _________ is actually a meteoroid that burns up in Earth's atmosphere
What is a meteor?
The horizontal distance measured from crest to crest or trough to trough
What is wavelength?
a circular system of currents
What is a gyre?
protein that speeds up chemical reactions in the body
What are enzymes?
The measure of the change in velocity during a period of time
What is acceleration?
According to Newton’s third law of motion, when a hammer strikes and exerts a force on a nail, the nail
What is exerts an equal and opposite force on the hammer?
This material comes from living things.
What is organic?
The tilt of the Earth toward or away from the Sun determines
What are the seasons?
The outer planets in order from the Sun
What are Jupiter, Saturn, Uranus, and Neptune?
The difference between high tide and low tide
currents caused by changes in water density
What are density currents?
Involuntary waves of muscle contractions that keep food moving in one direction
What is peristalsis?
The process of changing position over time relative to a reference point
What is motion?
A roller coaster passenger flying right out of his seat if he did not have a lap belt over him and the roller coaster suddenly stopped demonstrates this Law.
What is Newton's First Law of Motion?
The __________________ process step changes the inner structure of material.
What is conditioning?
When the Moon partially or completely covers the Sun, people on Earth may experience
What is a solar eclipse?
objects in the solar system that develop long tails during part of their orbit
What are comets?
A time when high tides are higher and low tides are lower
What is spring tide?
The model scientists use to explain the ocean circulation of thermal energy
What is The Great Ocean Conveyor Belt?
the process of moving nutrients through the wall of the digestive system into the blood
What is absorption?
The distance between an object's starting point and ending position
What is displacement?
two objects react to gravitational force between them, the more massive one _______________ more slowly than the less massive object.
This material is made by combining two or more materials to form a new material that is better than the original materials
What is composite?
The days of the year when the hours of daylight are longest and shortest
What are solstices?
The planet in the solar system with the highest density
What is Earth?
When the Sun, Moon, and Earth form a 90° angle (perpendicular)
What are neap tides?
The Gulf Stream is an example
What are surface currents?
Where bile is produced
What is the liver?