UIL Science Practice Test 1

Front

What is concentration in a solution?

Back

Concentration is the amount of solute (like salt) dissolved in a specific volume of solvent (like water). It is often expressed in grams per milliliter (g/mL).

Front

How do you calculate the concentration of a solution?

Back

Concentration (g/mL) = Mass of solute (g) / Volume of solvent (mL). For example, if 28 g of salt is dissolved in 500 mL of water, the concentration is 0.056 g/mL.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity. For example, Gold has an atomic number of 79.

Front

What does the principle of Uniformitarianism state?

Back

Uniformitarianism is the principle that the processes we observe today, such as erosion and sedimentation, have been occurring in the same way throughout Earth's history.

Front

What are the three main types of soil particles?

Back

The three main types of soil particles are sand, silt, and clay, ordered from largest to smallest: sand > silt > clay.

Front

Where are femoral pores located on a Texas Horned Lizard?

Back

Femoral pores are located on the thighs of male Texas Horned Lizards.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number determines the position of an element in the periodic table and its chemical properties.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume. It measures how much mass is contained in a given volume.

Front

What is the role of a geologist?

Back

A geologist studies the Earth, its materials, processes, and history, often examining rocks, minerals, and fossils.