Series of steps in which organisms transfer energy by eating and being eaten.

Organism that relies on other organisms for food; consumer

What may happen if the snowshoe hare were removed from the food web pictured?

In the energy pyramid shown here, how much of the energy in the producers is passed to the herbivores?

In the food web shown, the snail would be considered a...

A volcano erupting would be an example of what type of succession?

All of the biotic and abiotic factors.

A symbiotic relationship in which both organisms benefit.

Which of the following illustrates the correct order of trophic levels?

Rabbits introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increased so much that they displaced many native species of plant eaters. What is the most logical explanation for their increased numbers?

This word is used to describe the nonliving parts of an ecosystem.

Which aquatic ecosystem is found where freshwater rivers meet the ocean?

Which of the following is an abiotic factor in an ecosystem?

An ecosystem is made up of

This biome is very similar to a cold desert.

Cold, dry biome where the soil remains frozen throughout the entire year. Very little precipitation.

A group of ecosystems with similar organisms and climate.

Area of the forest formed by the leaves of tall trees.

A positively charged particle found in the nucleus of an atom is:

A negatively charged particle located outside the atom's nucleus is

A subatomic particle that has no charge and is found in the nucleus of an atom is

The center of an atom is 

Tectonic plates are made of?

Where does seafloor spreading take place?

At this boundary, plates slide past one another and earthquakes are created.

This type of boundary creates rift zones and shallow earthquakes

Earthquakes can occur along

What term is used to describe the rising and sinking of air due to temperature differences?

Which term refers to regions of sinking air with high atmospheric pressure?

What is the name given to regions of rising air with low atmospheric pressure?

What phenomenon causes moving air to rotate due to Earth's rotation?

Which of the following global winds blow from east to west in the tropics?

What do we call the prevailing winds that blow over long distances across Earth's surface?

What do we call winds that affect only a small area, such as a valley or mountain?

Which term refers to the areas where high or low pressure are found around the Earth?

The trade winds of both hemispheres meet in a calm area around the equator called the ____.

When cool air flows down the mountainside into the valley, it is known as a

When warm air rises up the mountainside, it is known as a

What term describes the movement of air caused by differences in temperature between two geographical areas?

The blue arrows represent cold air sinking. What type of pressure system forms here?

Red arrows represent hot air rising. What type of pressure system forms here?

The circular movement of air shown in the picture represents which type of weather system?

What type of weather is generally found where hot air rises?

If these boys are pulling with exactly the same amount of force, what will happen?

At which point is the potential energy greatest?

It takes more force to accelerate the Iron Man on the left than the Iron Man on the right because the Iron Man on the left has more mass. This best describes

The formula
? = mass × acceleration
or
? = m × a
is used to find

An automobile you are riding in suddenly stops, but you continue to move forward.

You push off, and the boat moves in the opposite direction. This is Newton's ____ law.

One object has twice as much mass as another object. The first object also has twice as much...

If an object is stationary (not moving), the forces acting upon it are _____________.

When a cannon fires a cannonball, we observe Newton's third law. Which force is the reaction force?

Which of Newton's laws does this picture represent?

Which simple machine can be used to split things apart and also hold a door open?

The unit of measurement for work is_____________.

The unit of measurement for force is _____________

True or False: The formula for work is Work = Force × Distance (W = F × D).

Work is done when ...

A simple machine that consists of a rigid bar that pivots on a fixed point.

An axe is an example of a:

A seesaw is an example of a:

The fixed point on a lever is called

When force is used to move an object across a distance, it is called...

The device used to raise a flag up a flagpole is an example of a

A greater applied force is required to move an object with greater mass than one with smaller mass.

Two students are at a baseball game. The first student hits a ball very hard, resulting in greater acceleration than the second student, who bunts the ball lightly.

Which type of symbiotic relationship involves one organism benefiting while the other is unaffected?

Which biome is characterized by coniferous forests and cold temperatures, but is not as cold as the tundra?

What is the term for winds that blow steadily over long distances and are influenced by Earth's rotation?