Periodic table
Chemical/Physical reactions
Hydrology
Fossils
Ecosystems
100

What is the horizontal row on the periodic table called?

What is Periods?

100

This substance increases the rate of a chemical reaction without being consumed or permanently changed itself.

What is a catalyst?

100

This process occurs when water vapor cools and changes back into liquid droplets, forming clouds.

What is condensation?

100

This type of fossil isn't a body part, but rather a record of biological activity, such as footprints, burrows, or even fossilized dung.

What is a trace fossil?

100

This term refers to all the living (biotic) and non-living (abiotic) factors in a specific area interacting as a system.

What is an ecosystem?

200

Which group of elements is known for being highly unreactive and having a full outer shell of electrons?

What Is Noble Gases?

200

This fundamental law states that in a chemical reaction, the total mass of the reactants must equal the total mass of these.

What are the products?

200

Often called "fossil water," this is the name for water stored in underground layers of water-bearing rock or sediment.

What is an aquifer?

200

Most fossils are found in this specific type of rock, which forms from the accumulation of minerals and organic particles over time.

What is sedimentary rock?

200

In a food chain, these organisms, such as fungi and bacteria, break down dead organic matter and return nutrients to the soil.

What are decomposers?

300

What does the atomic number of an element represent?

What is Number of Protons? 

300

This type of change occurs when water boils into steam, keeping its molecular structure identical.

What is Physical Change? 

300

This term describes the area of land where all of the water that falls on it drains off and goes to the same common outlet, such as a river or lake.

What is a watershed?

300

This sticky, fossilized tree resin is famous for preserving small organisms, like insects, in incredible three-dimensional detail.

What is amber?

300

This is the specific role or "job" an organism has within its habitat, including what it eats and where it lives.

What is a niche?

400

Most of the elements on the periodic table are classified as?

What is Metals? 

400

Often seen in chemical reactions, it's the 12-letter term for a solid that forms and settles out of a liquid solution.

 precipitate

400

In plants, this specific type of evaporation occurs when water is absorbed by roots and released as vapor through leaf pores.

What is transpiration?

400

This is the name for the process by which organic material is converted into stone through the replacement of cells with minerals like silica.

What is petrifaction?

400

This type of symbiotic relationship occurs when both species involved benefit from the interaction, like a bee and a flower.

What is mutualism?

500

Which element is the most electronegative on the periodic table?

What is Flourine? 

500

 A campfire is a classic example of this specific type of chemical reaction that releases energy in the form of heat or light.

Exothermic 

500

Named after a French engineer, this fundamental law or "equation" is used to calculate the rate at which a fluid flows through a porous medium like sand.

What is Darcy’s Law?

500

These are remains of organisms that lived for a short period over a wide area, helping scientists determine the age of rock layers.

What is an index fossil?

500

This rule of thumb states that only about this percentage of energy is transferred from one trophic level to the next.

What is 10%? (The Ten Percent Law)

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