ACT Prep

The underlined word or phrase with a number will correspond with sets of alternative words/phrases. From the options, choose the answer choice that works best in context.Among the technological wonders presented at the fair were primitive models of television, a new synthetic material called nylon (1) (and the first nylon stockings), and a speaking robot named Elektro.Which choice would provide a detail illustrating a use of one of the technological marvels?

• No Change

• (it was man-made),

• (previously natural materials had been used),

• (not the same as Orlon),

 $\frac{b}{5}\ge-4$  

•  $b\ge1$  

•  $b\ge-20$  

•  $b\ge20$  

•  $b\ge-24$  

Meteorites are of three kinds: stones, irons, and stony irons. Each corresponds to a different part of planet formation. The stones resemble pieces of planetary crust and mantle, the irons the planet cores, and the stony irons the transitional area between core and mantle. In some stony irons, translucent crystalline structures interpenetrate with opaque mantle rock. Collectors sometimes cut stony irons into thin slices and illuminate them from one side for a gorgeous stained-glass effect. Only one per cent of all meteorites are stony irons. Five per cent are irons, and the remaining ninety-four per cent are stones.

The main function of the paragraph is to:

• identify the three kinds of meteorites and provide information about each kind.

• describe the chemical structure of the different types of rock found within the meteorites classified as stones.

• explain why some meteorites contain both crystalline structures and opaque mantle rock.

• list common ways collectors display pieces of meteorites.

The product  $\left(2x^4y\right)\left(3x^5y^8\right)$  is equivalent to:

•  $5x^9y^9$  

•  $6x^9y^8$  

•  $6x^9y^9$  

•  $5x^{20}y^8$  

•  $6x^{20}y^8$  

The underlined word or phrase with a number will correspond with sets of alternative words/phrases. From the options, choose the answer choice that works best in context.

The following day, I caught a train south from Barcelona to Costa del Sol. On the way, I stopped off in Granada, reputedly one of the (1) more prettier cities in Spain.

• No Change

• prettiest

• prettier,

• most prettiest

A geomagnetic storm in Earth's magnetic field is indicated by an A_p greater than or equal to 30 nT. According to the Figure, a geomagnetic storm occurred at some time during each of how many years, if any, of the 13-year period?

• 0

• 1

• 12

• 13

Which of the following sets of plants served as the control in the experiment?

Herbicides are used to control the growth of weeds. An herbicide that may be used safely with one crop species may damage another crop if the latter crop is planted in soil containing residual amounts of the herbicide from an earlier application. The following experiment was performed to study this effect:

A botanist filled 90 pots with Soil Type 1. No herbicide was added to the soil in 10 pots. The other pots were divided into groups of 10 and the soil in each group was treated with 10, 20, 50, or 100 ppm of either Herbicide A or B. All other factors were held constant. Ten seeds of a corn hybrid were planted in each pot. After 40 days, the plants were uprooted, oven-dried, and weighed. The results are shown in the following table:

• Plants grown in untreated soil

• Plants grown in soil treated with 10 ppm of Herbicide A

• Plants grown in soil treated with 10 ppm of Herbicide B

• Plants grown in soil treated with 100 ppm of Herbicide A

The underlined word or phrase with a number will correspond with sets of alternative words/phrases. From the options, choose the answer choice that works best in context.

An average modern desktop computer is about 2,000 times faster than a PDP-1 and (1) have about 100,000 times as much random-access memory.

• No change

• are

• has

• is

Towering above the harbor in Alexandria, Egypt, the Pharos (lighthouse) was one of the Seven Wonders of the Ancient World. Roughly the height of a forty-story building, a signal fire was present there that guided sailors for hundreds of years.

Which choice clearly establishes that it was the Pharos that was roughly forty stories tall?

• No change

• it housed a signal fire that guided sailors

• sailors were guided by its signal fire

• guiding sailors was its signal fire

Lines p and q intersect at point (1,3) in the standard (x,y) coordinate plane. Lines p and r intersect at (2,5)

Which of the following is an equations for line p?

• y = 2x + 1

• y = 2x + 2

• y = 2x + 3

• y = 2x + 5