Three diagrams representing these three states of matter are shown:

• solid, liquid, gas
• liquid, solid, gas
• gas, solid, liquid
• liquid, gas, solid

The orbit of the moon around Earth is possible because of which property?

• the speed of revolution of Earth around the sun
• the strength of the force of gravity on Earth
• the strength of the magnetic field on Earth
• the speed of rotation of Earth on its axis

The volume of an irregularly shaped piece of iron can be determined by using the formula below. 
Volume=^mass/_density
V=^m/_d 
The density of iron is approximately 8.0 grams per cubic centimeter (g/cm³). The mass of this piece of iron is 16 grams (g). Which of these is the volume of this piece of iron?

• 0.5 cm³
• 2.0 cm³
• 24 g/cm³
• 128 g/cm³

A chemical reaction is represented by the equation. CH₄ (methane)+ 2O₂ (oxygen)--> CO₂ (carbon dioxide)+ 2H₂O (water)
Which substance is a product in this reaction?

• CH₄ (methane)
• H₂ (hydrogen)
• O₂ (oxygen)
• CO₂ (carbon dioxide)

The chart represents the relative amounts of the gases that make up the atmosphere of Earth. 
Which gas is most likely represented by the shaded area?

• oxygen
• nitrogen
• water vapor
• carbon dioxide

A student wants to make a magnet by wrapping a wire around a piece of iron. Which of these does the student need to do to make the iron magnetic?

• rotate the piece of iron inside the wire
• rub the wire with a silk cloth
• heat the wire on the piece of iron
• pass electricity through the wire

In which of these examples do the water molecules have the slowest motion?

• ice cubes resting in a freezer
• water dripping from a faucet
• rain falling from a cloud
•  water vapor collecting on a window

Which of these would most significantly decrease the biodiversity in a wetland area?

• removing invasive species from the wetland
• planting native trees in the wetland
• providing nesting boxes in the wetland for wildlife
•  draining the wetland to build houses

The best indicator that a combination of substances forms a compound is when the combination

• increases in volume.
• causes a color change.
• can be separated back into its original parts.
• forms a new material with different properties.

Which diagram shows an arrangement of poles that will produce a magnetic field most similar to the magnetic field of Earth?

• A
• B
• C
• D