Atoms & The Periodic Table
This subatomic particle has a positive charge.
What is a proton?
Melting ice is an example of this type of change.
What is a physical change?
This force pulls objects toward Earth.
What is gravity?
Energy of motion is called this.
What is kinetic energy?
This force keeps planets orbiting the Sun.
What is gravity?
This part of the atom contains protons and neutrons.
What is the nucleus?
Rust forming on metal is this type of change.
What is a chemical change?
An object moving at a constant speed in a straight line has this type of motion.
What is balanced motion or constant velocity?
Stored energy is known as this.
What is potential energy?
Earth rotates on this invisible line.
What is its axis?
Elements in the same column on the periodic table have similar what?
What are chemical properties?
This is evidence that a chemical reaction occurred.
What is color change, gas production, temperature change, or precipitate formation?
According to Newton’s First Law, an object at rest will stay at rest unless acted on by this.
What is an unbalanced force?
This form of energy is transferred through vibrations.
What is sound energy?
The changing appearance of the Moon is caused by this.
What are the Moon phases?
An atom has 11 protons and 12 neutrons. What is its atomic number?
What is 11?
A student burns wood and observes smoke, ash, and heat. Why is this a chemical change?
What is because new substances are formed?
A car suddenly stops and passengers move forward. Which law explains this?
What is Newton’s First Law of Motion?
A roller coaster reaches the top of a hill before speeding downward. At the top, what type of energy is greatest?
What is gravitational potential energy?
A student in Florida observes longer daylight hours during summer. What causes this?
What is Earth’s tilted axis?
Why are elements arranged by increasing atomic number on the periodic table?
What is because atomic number represents the number of protons and determines the element’s identity?
Why is dissolving sugar in water considered a physical change even though the sugar seems to disappear?
What is because the sugar molecules remain unchanged and can be recovered?
Why does a heavier object require more force to accelerate than a lighter object?
What is because greater mass results in greater inertia?
Why is energy considered conserved during energy transformations?
What is because energy cannot be created or destroyed, only transformed?
Why do scientists believe the universe began with the Big Bang?
What is because evidence such as galaxy movement and cosmic background radiation supports the theory?