Mixed Deck — All ICAS Topics Flashcards

Scientists studying a lake record average fish populations each year for 10 years. They notice a sharp decline in Year 6. Which factor would best explain this anomaly?

Answer: A pollution event or disease outbreak in Year 6

A sudden sharp decline suggests an environmental disruption such as pollution or disease rather than gradual natural change.

What is the prime factorization of 36?

Answer: 2² × 3²

36 = 4 × 9 = 2² × 3², which is its prime factorization.

An author ends a story with: 'As she closed the door, she finally understood what her grandmother had meant all along.' What technique is the author using?

Answer: Providing a circular ending that connects back to an earlier idea

A circular or reflective ending ties the conclusion back to something established earlier, giving the story a sense of resolution.

Which correctly spells the past tense of 'carry'?

Answer: carried

When adding '-ed' to a verb ending in 'y' preceded by a consonant, change 'y' to 'i': 'carried'.

Which type of rock forms when layers of sediment are compressed over millions of years?

Answer: Sedimentary

Sedimentary rock such as sandstone forms from compacted and cemented layers of sediment.

What is the output of: 5 + 3 * 2 in most programming languages?

Answer: 11

Due to operator precedence, multiplication is performed before addition: 3 × 2 = 6, then 5 + 6 = 11.

In persuasive writing, which transition word BEST signals a counterargument?

Answer: Admittedly

'Admittedly' signals that the writer is conceding a point to the opposing side before rebutting it.

What is the meaning of the idiom 'bite the bullet'?

Answer: To face a painful situation bravely

'Bite the bullet' means to endure a painful or difficult situation with courage.

Which part of the water cycle involves water vapor cooling and turning into liquid water droplets to form clouds?

Answer: Condensation

Condensation occurs when water vapor cools and converts to liquid, forming the tiny droplets that make up clouds.

Which of the following is true about an array in programming?

Answer: It stores multiple values of the same type under one name

An array is a data structure that holds multiple values, typically of the same type, accessible by an index.

Which organelle is known as the 'powerhouse of the cell' because it produces energy?

Answer: Mitochondria

Mitochondria produce ATP (adenosine triphosphate), the main energy currency of the cell, through cellular respiration.

Which file format is best suited for storing a large database of student records that needs to be opened by many different programs?

Answer: CSV

CSV (Comma-Separated Values) is a plain-text format readable by almost any spreadsheet or database program.

What does 'encryption' do to data?

Answer: Converts data into a coded format that can only be read with the correct key

Encryption transforms data into an unreadable coded format, protecting it from unauthorized access until it is decrypted with the correct key.

Which greenhouse gas is produced in the largest quantity by human agricultural practices, particularly from livestock and rice paddies?

Answer: Methane (CH₄)

Methane is released in large amounts from cattle digestion and flooded rice paddies, making agriculture a major source.

Which of the following words is an exception to the common "i before e, except after c" spelling rule?

Answer: Seize

The word 'seize' is a well-known exception to the 'i before e, except after c' rule, as the 'ei' combination does not follow a 'c'. 'Believe' and 'friend' correctly use 'ie'. 'Receive' correctly uses 'ei' after 'c'.

The carbon cycle is the process by which carbon is exchanged among the biosphere, geosphere, hydrosphere, and atmosphere. Human activities have significantly altered this cycle. Which human activity is the primary contributor to the increase of carbon dioxide in the atmosphere?

Answer: The burning of fossil fuels for energy.

Fossil fuels like coal, oil, and natural gas are ancient carbon stores. When humans burn them for electricity, transportation, and industry, this stored carbon is released into the atmosphere as carbon dioxide (CO2), a potent greenhouse gas. This is the main driver of the observed increase in atmospheric CO2 concentrations.

What does a colon (:) most commonly introduce in a sentence?

Answer: A list or detailed explanation

A colon is used to introduce a list, an explanation, or additional information that follows.

In persuasive writing, 'conceding a point' to the opposition is considered:

Answer: A strategy that shows fairness and strengthens the writer's credibility

Acknowledging a valid point from the opposition before rebutting it demonstrates intellectual honesty and actually increases the writer's persuasive credibility.

Which device is used to input information into a computer?

Answer: Printer

While a standalone printer is primarily an output device, many modern printers are multifunction devices that integrate scanning capabilities. A scanner is an input device that captures physical documents or images and converts them into digital data, which is then 'input' into the computer. Therefore, in the context of a multifunction device, a 'printer' can indeed facilitate the input of information.

Which sentence contains a coordinating conjunction?

Answer: I like cats but I prefer dogs.

'But' is a coordinating conjunction that connects two contrasting independent clauses.