District Team Science UIL

Front

What does the period number of an atom indicate?

Back

The period number indicates the number of energy shells an atom has.

Front

How do you prepare a dilution from a concentrated solution?

Back

To prepare a dilution, use the formula C1V1 = C2V2, where C1 is the concentration of the stock solution, V1 is the volume of the stock solution needed, C2 is the concentration of the diluted solution, and V2 is the final volume of the diluted solution.

Front

What are the five characteristics that define a mineral?

Back

1. Naturally occurring 2. Inorganic 3. Solid 4. Definite chemical composition 5. Ordered internal structure.

Front

Why is a tether rope important for astronauts in space?

Back

A tether rope is important to keep astronauts from floating away into the endless space.

Front

What is the definition of a rock?

Back

A rock is a naturally occurring solid aggregate of one or more minerals or mineraloids.

Front

What is the difference between a mineral and a rock?

Back

A mineral is a naturally occurring inorganic solid with a definite chemical composition and crystalline structure, while a rock is a solid aggregate of one or more minerals.

Front

What is the formula to calculate the concentration of a solution?

Back

Concentration (C) = Amount of solute (in moles) / Volume of solution (in liters).

Front

What is the significance of the number of energy shells in an atom?

Back

The number of energy shells determines the atom's electron configuration and its chemical properties.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

How can you identify a mineral?

Back

You can identify a mineral by examining its physical properties such as color, luster, hardness, cleavage, and specific gravity.

Front

What is the role of dilution in scientific experiments?

Back

Dilution is used to decrease the concentration of a solution, making it safer or more suitable for specific experiments.