UIL Science Practice Test 1

Front

What is a lahar?

Back

A lahar is a destructive mudflow that occurs after a volcanic eruption, often consisting of a mixture of water, volcanic ash, and debris.

Front

Where are the femoral pores located on a male Texas Horned Lizard?

Back

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

Front

What principle did James Hutton describe in 1795 regarding Earth's processes?

Back

The principle is known as Uniformitarianism, which states that the processes we observe today are the same as those that occurred in the past.

Front

What is the order of grain sizes from largest to smallest?

Back

The order is sand, silt, clay.

Front

What does the 10% rule of energy transfer in trophic levels state?

Back

The 10% rule states that only about 10% of the energy from one trophic level is transferred to the next level.

Front

Define 'trophic level'.

Back

A trophic level is a position in a food chain or food web, representing the flow of energy and nutrients from producers to consumers.

Front

What is the role of producers in an ecosystem?

Back

Producers, such as plants, convert sunlight into energy through photosynthesis, forming the base of the food chain.

Front

What are primary consumers?

Back

Primary consumers are organisms that eat producers; they are typically herbivores.

Front

What is the difference between a primary consumer and a secondary consumer?

Back

Primary consumers eat producers, while secondary consumers eat primary consumers.

Front

What is an example of a tertiary consumer?

Back

An example of a tertiary consumer is a hawk that eats snakes, which are secondary consumers.