Science Practice

___ is the basic particle from which all elements are made.

• Atom
• Compounds
• Water
• Air

The image shows a hydrogen ion. What is an ion?

• An balanced atom
• An atom with no electrical charge
• An atom with an unequal number of electrons and protons.
• An atom with zero protons

Which type of chemical bond is formed by the attraction of negative and positive ions?

• Covalent Bond
• Ionic Bond
• Magnetic Bond
• Physical Connection

Which type of chemical bond is created when atoms share electrons?

• Covalent Bond
• Ionic Bond
• Super Glue
• Magnetic Bond

When baking soda is mixed with water, it dissolves in to the water. In this case the water is said to be the _____

• Solvent
• Solute
• Acid
• Base

Acidic substances fall near what level on the pH scale?

• Lower (smaller value)
• Higher (high value)
• middle
• Not on the pH scale

What type of mirror is shown?

• concave mirror
• convex mirror
• plane mirror
• distortion mirror

Which letter shows the type of wave that can be seen by the human eye?

• A
• B
• C
• D

Which electromagnetic waves have the longest wavelengths and the lowest frequencies?

• infrared waves
• radio waves
• ultraviolet rays
• gamma rays

Electromagnetic waves can transfer energy without a(n)

• medium
• electric field
• magnetic field
• change in either a magnetic or an electric field