SCIENCE CAPT PRACTICE TEST

In 1742, Benjamin Franklin designed a wood-burning stove to heat rooms. The front of the stove was open, allowing heat to spread into a room. The back of the stove was closed, but had an air intake that increased air circulation. Fires lit in traditional fireplaces received less oxygen than those lit in Franklin stoves. What effect does a lit Franklin stove have on the air molecules in a room?

Decreases their mass

Increases their speed

Decreases their volume

Increases their energy loss

The common pH scale for acids and bases runs from 0 to 14, with 7 being neutral. Solution A has a pH of 5 and solution B has a pH of 3. Which of the following statements is correct when comparing the level of acidity in solutions A and B?

Solution A is twice as acidic as solution B

Solution B is twice as acidic as solution A

Solution A is 100 times more acidic than solution B

Solution B is 100 times more acidic than solution A

If a ceramic cup is placed on top of a lit Franklin stove, it will gradually heat up. What is the mode of heat transfer from the Franklin stove to the ceramic cup?

Radiation

Convection

Conduction

Sublimation

The complete combustion or burning of natural rubber will produce______?______.

Hydrogen (H) and oxygen (O)

. oxygen (O) and water (H2O)

Hydrogen gas (H2) and water (H2O)

. Carbon dioxide (CO2) and water (H2O)

Over 6 billion people on Earth use water every day, yet Earth’s water supply remains relatively constant. This is because____________.

The sea level is rising

. Water exists in three phases on Earth

Water is constantly recycled by the hydrologic cycle

Global warming melts ice to replace water that is used

In 1915, Mount Mitchell was designated as North Carolina’s first state park and was covered by a dense forest. Today, the forest has thinned considerably as a result of pollution and acid deposition. According to the Division of Parks and Recreation, the forest experiences acid fogs approximately 80% of the year. State officials have determined that much of the air pollution in North Carolina originates in other states and is transported by winds. In 2004, the Environmental Protection Agency began to develop a plan to reduce harmful emissions in states that are “upwind” from North Carolina. What type of facility is most responsible for the pollution that results in acid deposition on Mount Mitchell?

Nuclear power plants

Coal-fired power plants

Toxic waste disposal facilities

Wastewater treatment facilities

Plants, like all other organisms, are composed of cells. A group of students placed spinach leaves in a beaker of water in full sunlight. After several hours, small bubbles appeared on the leaves. These bubbles probably consisted of ______?______.

H2O

CO2

Two farmers plant different varieties of corn on neighboring farms. Farmer A plants genetically modified corn. Farmer B plants a non-modified variety of corn. What would be farmer B’s primary concern if she plans to gather seed for next year’s crop?

Loss of genetic variability in the non-modified variety

That mutation rates will increase in the non-modified variety

That insects will only pollinate the genetically modified corn

Unintended transfer of modified genes to her crop by cross-pollination

SCIENCE CAPT PRACTICE TEST

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