Periodic Table Talk
This pure substance is made of only one type of atom and is listed on the periodic table.
What is an element?
In saltwater, salt is the solute. This part of the solution does the dissolving.
What is solvent?
This is the difference between speed and velocity: velocity includes this extra piece of information.
What is direction?
This method of thermal energy transfer happens when you touch a metal spoon that’s been sitting in hot soup.
What is conduction?
This object at the center of our solar system is the main source of heat and light.
What is the sun?
This substance is made of two or more different elements chemically bonded together in a fixed ratio.
What is a compound?
This type of change occurs when sugar dissolves in water—it can be reversed and doesn't create a new substance.
What is a physical change?
If a car travels 100 kilometers in 2 hours, this is its average speed.
What is 50 km/hr?
This type of heat transfer occurs in fluids like air and water, where warm parts rise and cooler parts sink.
What is convection?
This force keeps the planets in orbit around the Sun and governs motion throughout the solar system.
What is gravity?
In the chemical formula CO₂, this is the number of oxygen atoms present.
What is 2?
If you stir sugar into hot tea instead of cold water, the sugar will dissolve faster. That’s because this factor increases the rate of dissolution.
What is temperature?
On a distance-time graph, a straight diagonal line going up means the object is doing this.
What is moving at a constant speed?
The Sun warms your face even though you're not touching it and there's no air in space. This is an example of this kind of energy transfer.
What is radiation?
These icy objects come from the Kuiper Belt or Oort Cloud and develop tails as they get close to the Sun.
What are comets?
In the chemical formula 3H2O2, this is the number of molecules present.
What is 3?
You can make a solution more diluted by doing this.
What is adding more solvent (usually water)?
According to Newton’s First Law, an object at rest will stay at rest unless acted on by this.
What is an unbalanced force?
Thermal energy always moves in this direction—until everything reaches the same temperature.
What is from warmer to cooler?
Earth supports life because of three key features: liquid water, the right distance from the Sun, and this protective gas layer.
What is the atmosphere?
Using the periodic table, identify the elements in NaCl and how many atoms of each it contains.
What is 1 atom of sodium and 1 atom of chlorine.
Crushing a sugar cube before dissolving it in water increases this factor, helping it dissolve faster.
What is surface area?
A box is pushed from both sides with equal force. It doesn’t move. That’s because the forces are this.
What are balanced forces?
When all parts of a system have the same temperature and no more heat is being transferred, the system has reached this state.
What is thermal equilibrium?
These two regions beyond Neptune are full of icy bodies and leftovers from the formation of the solar system.
What are the Kuiper Belt and Oort Cloud?