taks mats taks questions- ipc mats. this statement above is a poor hypothesis because it is not –...

TAKS Mats

TAKS Questions- IPC Mats

This statement above is a poor hypothesis because it is not –

a. A question

b. testable

c. observable

d. A comparison

The graph shows data for botulism, a form of food poisoning. The conclusion in the box is based on these data. Which of the following is the best reason this conclusion may be unreliable?

a. The greatest number of reported botulism cases was 50.

b. The number of reported botulism cases remained relatively constant from 1988 to 1995.

c. More botulism cases were reported in the 1980s than in the 1990s.

d. The number of reported botulism cases decreased after 1994.

Melissa heated a few blue crystals in a test tube. After a few minutes she observed that the crystals had turned white, and a film of water had formed on the inside of the test tube. Before Melissa conducted this experiment, she most likely –

a. Developed a theoryb. Developed a hypothesisc. Developed a biasd. Most Abundant Elements at Earth’s Surfacee. Developed a scientific law

Which conclusion is best supported by these data?

a. Earth’s surface is composed mostly of silicon and calcium.

b. Oxygen is closer to Earth’s surface than aluminum

c. There is more aluminum than calcium at the Earth’s surface.

d. Silicon is much heavier than iron at Earth’s surface.

Most Abundant Elements at Earth’s Surface

Element % by Mass

Oxygen 46.6

Silicon 27.7

Aluminum 8.13

Iron 5.0

Calcium 3.63

In an investigation 10,000 dung beetles were examined for the presence of parasites. The data showed that about 5% of the beetles had parasites. The results are

a. Invalid because only dung beetles were examined.

b. Unsupported because the parasite population was small.

c. Erroneous because more beetles should have had parasites.

d. Valid because the sample size was sufficient for accuracy.

According to the information in the graph below, what is the best prediction for the speed of the cart if 8 bowling balls were placed inside?

a. 9 cm/s

b. 3 cm/s

c. 6 cm/s

d. 0 cm/s 0

3

6

9

12

15

18

21

24

1 2 3 4 5

Number of Bowling Balls in Cart

Speed of Cart –vs- Load

Speed of Cart (cm/s)

The table on the right shows the results of a study testing the effectiveness of an ulcer medication. Why was one group given a sugar tablet?

a. To include a control groupb. To have an experimental

groupc. To provide a variety of

treatmentsd. To give the body additional

nutrients

A student is studying how sound can travel through a solid media by timing the movement of sound through a boulder when the boulder is at different temperatures. Using the information below, how fast will sound move through the boulder when it reaches 20oC?

a. 569 m/sb. 570 m/sc. 571 m/sd. 572 m/s

Which graph best represents the speed of the cart from point A to point B?

B

A B C D

Horses kept in stables sometimes chew on wood. This can lead to damage to the mouth and digestive system. The graph shows the results of a study of a medication that prevents horses from chewing on wood. From the graph, what inference can be made about the effectiveness of the product?

a. Most horses like the medicationb. The medication is most effective

between days 4 and 5c. Most horses will show

improvement within 7 days.d. The effects of the medication

are long lasting

Alan researched how energy is used is used in the United States. He found that 20 percent is used in homes, 27 percent is used for transportation, 16 percent is used for business, and 37 percent is used for business and 37 percent is used by industry. Which area of the graph represents transportation?a. Qb. Rc. Sd. T

The graph shows mercury levels found in sediments, prey animals, and adult shorebirds in a bay along the Gulf Coast. Which inference can best be drawn from these data?

a. Mercury levels are elevated by the presence of shorebirds.

b. Mercury concentrations are highest in shorebirds.

c. Mercury is produced by sediments.

d. Mercury assures the survival of prey animals.

A

B

C

D

Which graph can represent an object at rest?

A

D

C

B

The firefighter feels the hose pushing backwards. What is the most likely cause of this?

A The hose material is very elastic.B Since the hose is at rest, it tends to stay at rest.C The force exerted on the water equals the mass

of the water times its acceleration.D The escaping water exerts an equal and

opposite force on the hose.

According to the diagram, which statement best describes what happens when two astronauts collide in space?

A Their kinetic energy increases.B Their velocity increases.C Their momentum is conserved.D Their potential energy increases.

A student in a boat decided to go for a swim. He dove off the back of the boat, as shown in the diagram. The boat moved in the direction shown by the arrow. Which statement best explains why the boat moved in the direction shown?

A A boy in motion tends to remain in motion.B The acceleration of a body is directly proportional to the

force applied.C The acceleration of a body is directly proportional to the

force applied.D Friction on the bottom of the boat was reduced because

of the lake water.

A quarter is resting on top of an index card, which has been placed across the top of a small cup. When the card is given a horizontal push to the right, what will happen?

A The card and quarter will move to the right, off the cup, and land toether.B The card and quarter will move to the right and land on the table, but the

quarter will travel farther.C The card will fall off the cup, but the quarter will fall directly into the cup.D The card and quarter will flip off the cup and land upside down on the table.

How much force is needed to accelerate a 500.0-kg car at a rate of 4.00 m/s/s?

A 125.0 N

B 250.0 N

C 2000.0 N

D 4000.0 N

Which illustration best demonstrates compression waves?

Which label on the model below represents a wavelength?

A. Q B. R C. S D. T

A 0oC sound travels through air at a speed of 330 m/s. If a sound wave is produced with a wavelength of 0.10 m, what is the wave’s frequency? (velocity of a wave = frequency x wavelength)

A. 0.0033 Hz

B. 33 Hz

C. 330 Hz

D. 3300 Hz

A tuning fork has a frequency of 20 Hz and a wavelength of 5.2 m. What is the speed of the wave produced by the tuning fork?

(velocity of a wave = frequency x wavelength)

A. 0.26 m/s

B. 3.85 m/s

C. 38.40 m/s

D. 104 m/s

Which label on the model below represents an amplitude?

A. Q B. R C. S D. T

A 3.00-kg object rests on the roof’s edge of a 10.0-m high building. What is the object’s potential energy?

a. 22.8 J

b. 33.0 J

c. 294 J

d. 300. J

A 1-kg block of ice is set into motion on a frictionless surface. It attains a speed of 5 m/s at point X. What is the kinetic energy of the ice at point X?

a. 2.5 J

b. 5 J

c. 12.5 J

c. 25 J

What is the potential energy acquired by an object with a mass of 5.00 kilograms when it is raised 5.00 meters?

a. 25.0 J

b. 49.0 J

c. 245 J

d. 480. J

What is the approximate difference in gravitational potential energy of the two shaded boxes?

a. 19 J

b. 39 J

c. 59 J

d. 79 J

Fuel cells powered by plankton from the seabed can be used to operate instruments that monitor ocean currents and water temperature. These fuel cells get their energy by converting-

a. chemical energy to electrical energyb. electrical energy to mechanical energyc. hydroelectric energy to geothermal energyd. mechanical energy to chemical energy

In the picture below, room A, the heat from the pot on the stove moves to the pot’s handle by—

a. Conduction

b. Convection

c. Radiation

d. Sublimation

The primary way liquids and gases transmit heat is by the process of –

a. Reflection

b. Conduction

c. Radiation

d. Convection

In winter the air just above the top bunk of the bunk bed is warmer than the air just above the bottom bunk because warm air rises. Which of the following describes the method of heating that causes this difference in temperature?

a. Radiation from the roomb. Heat transfer through the

wallsc. Convection currents in the

roomd. Heat conduction through the

bed

Which of these is the best example of heat transfer by radiation?

a. A satellite is warmed by sunlight

b. Butter melts on warm bread.

c. A ceiling fan cools a warm room

d. Puddles of water cool a warm tile floor

A man who was sleeping wakes up because he hears the smoke alarm go off in his house. Before opening the bedroom door, the man feels the door to see whether it is warm. He is assuming that heat would be transferred through the door by –

a. Conduction b. Convectionc. Radiationd. Compression

The bulb will light when a current supplied by at least one 1.5 V battery is available. Which circuit will fail to light the bulb?

A

B

C

D

Which circuit is built so that if one lightbulb goes out, the other three lightbulbs will continue to glow?

A

B

C

D

Oxygen (O2) is an example of -

A. an alloy

B. a molecule

C. a salt

D. a mixture

Which of these are composed of two or more different substances that are chemically combined in a definite ratio?

A. Compounds

B. Mixtures

C. Elements

D. Solutions

An unknown silvery powder has a constant melting point and does not chemically or physically separate into other substances. The unknown substance can be classified as -

A. an element

B. a compound

C. a mixture

D. an alloy

A mixture made up of different substances that can be easily seen is a:

A. normal mixture

B. homogeneous mixture

C. heterogeneous mixture

D. compounded mixture

What kind of mixture is toothpaste?

A. homogeneous mixture

B. heterogeneous mixture

C. emulsion

D. colloid

Rust (Fe2O3) forms on an iron (Fe) pipe after prolonged exposure to humid air. What type of change does this illustrate?

A. Mechanical

B. Nuclear

C. Chemical

D. Physical

Sheets of ice containing mostly pure water can be formed by decreasing the temperature of saltwater. Which of these best describes this change?

A. Chemical change

B. Physical change

C. Nuclear change

D. Atomic change

In the rock cycle. Which of these is a chemical change involved with the formation of igneous rocks?

A. Compression of sediments

B. Heat loss from lava

C. Subduction of plates

D. Formation of minerals

Which of these describes a chemical change?

A. Frost disappears from a window in the morning.

B. A decrease in temperature reduces the volume of a gas.

C. Soot (ashes) is formed as a candle burns.

D. A cup of hot tea cools down.

A sugar cube in a test tube is heated over a Bunsen burner. The sugar cube turns black and has less mass than before it was heated. These changes occur because the sugar has –

A. melted

B. boiled

C. reacted chemically

D. become hydrated