Water is a good solvent because _____.

A solution that cannot hold any more solute at room temperature would be _____.

Ethanol dissolved in water would be an example of _____.

To form a supersaturated solution requires _____.

Which one of the following is an example of a physical change?

Which one of the following is not a physical change?

The chemicals after a chemical change _____.

Heptane is always composed of 84% carbon and 16% hydrogen by mass. What law does this observation illustrate?

Give the mass number for an atom that has 10 protons, 10 electrons, and 11 neutrons.

How much of substance W will react with 9.0 g of substance Z? Use the reaction data table: Substance W, mass before the reaction 6.0 g and mass after the reaction 0.0 g; Substance Z, mass before the reaction 3.0 g and mass after the reaction 0.0 g; Substance WZ, mass before the reaction 0.0 g and mass after the reaction 9.0 g.

The amount of substance WZ that will be produced from 12.0 g of substance Z assuming that substance W is in excess is _____. Use the reaction data table: Substance W, mass before the reaction 6.0 g and mass after the reaction 0.0 g; Substance Z, mass before the reaction 3.0 g and mass after the reaction 0.0 g; Substance WZ, mass before the reaction 0.0 g and mass after the reaction 9.0 g.

Which conditions will increase the rate of chemical reaction?

When a lit match is touched to the wick of a candle, the candle begins to burn. When the match is removed, the candle continues to burn. In this reaction, the match _____.

Compared to a glass of ice water with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up _____.

In 150 cm³ water, how much of the substance will dissolve at 75° C? The solubility of a substance was determined in 300 cm³ water at different temperatures and a graph was obtained, showing 36 g soluble at 75° C.

Questions 17 and 18 refer to the diagram that follows. After studying the illustration above, one may conclude that _____.

Questions 17 and 18 refer to the diagram that follows. One may also conclude that _____.

For questions 19 and 20: Jacques Charles was a French hot air balloonist and scientist. He discovered Charles' law by studying the relationship between the volume and temperature of a gas at a constant atmospheric pressure. As the temperature of the gas in a balloon increased, its volume also increased. In equation form, for the case of a constant pressure: $$V/T = \text{constant}$$ . If the volume of a gas at a certain pressure is halved, _____.

For questions 19 and 20: Jacques Charles was a French hot air balloonist and scientist. He discovered Charles' law by studying the relationship between the volume and temperature of a gas at a constant atmospheric pressure. As the temperature of the gas in a balloon increased, its volume also increased. In equation form, for the case of a constant pressure: $$V/T = \text{constant}$$ . Which of the following graphs shows the temperature–volume relationship for a gas? (T = temperature and V = volume)

Unless an object at rest is acted upon by a force, it stays at rest due to its _____

Maron rode on his bike from 9:00 am to 10:30 am. If he drove at an average speed of 15 kph, what was the total distance he covered?

A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant velocity. The constant force by the woman _____

If the woman in the previous question suddenly stops applying a horizontal force to the box, then the box will _____

The 0.20 kg block is attached to a spring which has a spring constant of 20 N/m. The block is initially stretched 0.10 meters and released at time t = 0 seconds. Complete the following statement: In order to increase the frequency of the motion, one would have to _____

For the velocity-time graphs shown, which graph indicates a body moving at constant speed?

Which of the velocity-time graphs shows a body moving at high acceleration at the beginning then starts to lose acceleration towards the end?

The acceleration in a body is due to

Two students are posed to dive off equal height diving towers to a swimming pool below. Student B is twice as massive as student A. Which of the following is true?

Which of the following cases is/are NOT a uniformly accelerated motion? (1) A feather falls from a certain height inside a vacuum tube. (2) A ball rolls along a frictionless plane at uniform speed. (3) A coin falls from a certain height in air but air resistance is negligible.

From the illustration with three cubes labeled A, B, and C in water, one can conclude that _____

Cube C sinks because _____

In the figure that follows, what is the direction of the force exerted by the ladder?

A 200 N box is pushed up an incline that is 5.00 m long and rises 1.00 m. If the incline is frictionless, then the work done by the pushing force is _____

A 2000 kg car accelerates from rest to a velocity of 20 m/s in 10 seconds. The power of the engine during this acceleration is _____

A gem or mineral that is red absorbs _____

When viewed straight down (90° to the surface), an incident light ray moving from the water to air is refracted _____.

Someone is wearing perfume on their wrist. Why can people near them smell it?

Your flashlight has three identical 1.5 volt batteries in it, arranged in a chain to give a total of 4.5 volts. Current passes first through battery (a), then through battery (b), then through battery (c), on its way to the bulb. When you operate the flashlight, the batteries provide power to the current and they gradually use up their chemical potential energy. Which battery will run out of chemical potential energy first?

The figure shows a radiation heater. What heat transfer processes are involved at positions E and F?

An astronaut picks up a stone on the moon and finds its mass to be 2 kg. If the mass of the earth is 6 times more than the mass of the moon, what will the mass and the weight of the stone be on the earth?

Water is boiled in a flask with a balloon over the top. As the water heats, the balloon expands. What has happened to the weight of this flask and balloon in this experiment?

A student wishes to find the density of an irregular piece of rock. How will she find volume?

A barge filled with scrap iron is in a canal lock. If the barge were to sink what would happen to the water level?

Suppose you have a pendulum clock which keeps correct time on Earth (acceleration due to gravity = 9.8 m/s2). Without changing the clock, you take it to the Moon (acceleration due to gravity = 1.6 m/s2). For every hour interval (on Earth) the Moon clock will record _____.

As a star exhausts hydrogen in its core, it _____.

An upright stick that is allowed to cast a shadow in sunlight is called _____.

A solar or lunar eclipse will occur _____.

How much time should it take for a traveling bullet to hit the ground compared to a bullet dropped from rest? Assume the ground remains flat for the entire distance the bullet may travel.

Bart placed four identical candles on a table and lit them. He covered the first candle with a big jar, the second with a medium-sized jar, and the third with a small jar. He left the last candle uncovered. Which candle probably took the longest time to burn?

Which of the following is not considered a simple machine?

For questions 52–53. Number of OFW’s in four countries: A table lists the number of OFW’s (x1000) in Hongkong, Kuwait, Italy, and USA for each year from 1995 to 2004. Which country shows the greatest rate of increase over the years?

For questions 52–53. Number of OFW’s in four countries: Refer to the bar graph of the Number of OFW’s for the years 1995 to 2004. The graph below shows the number of OFW’s in which country?

For questions 54–60, refer to the following graph. A substance is heated by a source supplying 1000 calories per minute. The freezing point of this substance is _____.

For questions 54–60, refer to the following graph. A substance is heated by a source supplying 1000 calories per minute. The boiling point of the substance is _____.

For questions 54–60, refer to the following graph. A substance is heated by a source supplying 1000 calories per minute. The substance undergoes a phase change between the _____.

For questions 54–60, refer to the following graph. A substance is heated by a source supplying 1000 calories per minute. How many calories are needed to completely melt the sample at its melting point?

For questions 54–60, refer to the following graph. A substance is heated by a source supplying 1000 calories per minute. How long did it take for the substance to completely turn into gas?

For questions 54–60, refer to the following graph. A substance is heated by a source supplying 1000 calories per minute. The substance is solid at _____.

For questions 54–60, refer to the following graph. A substance is heated by a source supplying 1000 calories per minute. How many calories are needed to completely change the sample into a liquid?

What factor distinguishes a suspension from a colloid?

Lorna placed 1 kg of sandy soil and 1 kg clay soil into Pot A and Pot B respectively. She then poured equal volumes of water into each pot. After a day, it is expected that _____.

Hydrogen and oxygen molecules in a gas sample have the same temperature. This means the hydrogen molecules, on the average, have the same _____.

Acids are substances that _____.

Marinades for meat commonly include acids such as vinegar or wine, because the acids can _____.

The basic requirement for the separation of the components by _____ is that the composition of the vapor be different from the composition of the liquid at the boiling point of the liquid.

Taken by itself, the fact that 8.0 g of oxygen and 1.0 g of hydrogen combine to give 9.0 g of water demonstrates what natural law?

What are the coefficients that will balance the formula equation below? AlCl3 + NaOH → Al(OH)3 + NaCl

A hydrocarbon that contains one or more double bonds is classified as a(n) _____.

When heat is absorbed by the system from the surroundings, the process is said to be _____, and the sign of process is _____.

Which of the following did not help Darwin formulate his theory of evolution?

Which of the following pairs are analogous structures?

Of the following biological levels of organization, which represents the smallest or lowest level?

Which of the following is not a property of life?

Five positions of a swinging pendulum are shown in the diagram. A and E are the highest positions attained by the pendulum; the lowest is C. The kinetic energy of the pendulum is highest at position(s) _____.

Five positions of a swinging pendulum are shown in the diagram. A and E are the highest positions attained by the pendulum; the lowest is C. Speed is minimum at position(s) _____.

The sexually-transmitted disease gonorrhea is becoming difficult to treat because the causative bacteria are evolving resistance to antibiotics. For example, in Hawaii between 1997 and 1999 resistance to fluoroquinolones increased from 1.4 percent to 9.5 percent. Scientists attribute this to natural selection. What does natural selection mean in this context?

A slippery outer covering in some bacteria that protects them from phagocytosis by host cells is _____.

Differences between eukaryotic and prokaryotic cells include all of the following except _____.

The optimum temperature for an organism is the one at which _____.

In the illustration below, A and B are liquids while C is a solid. Which of the following is true?

For the following graph of the movement of a car, at which point is the car decelerating?

For the following graph of the movement of a car, at which point is the car accelerating rapidly?

In a plant, what part stores sugars as starch?

ADP energy is used for ______.

The cytoskeleton of the cell functions to ______.

A red blood cell plasma membrane contains ______ different types of proteins.

During ______, the chromosomes attach to the spindle and align at the metaphase plate of the spindle.

In the diagram, assume that each container contain equal volumes of water. In what container is the pressure at the bottom greatest?

At which point on the door will you apply the greatest force to close it?

Graphs of distance (d) or velocity (v) of a body against time (t) are shown. Which one shows that a body is at rest?

Which of the velocity–time graphs in the figure represents an object falling freely in a vacuum? (v = velocity, t = time)

In the following illustration, if the pendulum was swinging in the direction indicated by the arrow when its string was suddenly cut, in what direction did the pendulum go?

If two flies heterozygous for wing length and body color are crossed, which of the following are possible results?

A cross in which true-breeding plants differ in two traits is known as a ______ cross.

Which is narrower?

______ are protozoa with no means of locomotion.

The vertebrate skeleton ______.

Protoplasts are cells without ______.

The relationship of give-and-take of living organism in the biosphere is a balance of nature called ______.

Process of removing excess odor in water.

Which of the following statement is CORRECT?

The earth rotates on its axis from west to east. This causes the sun to ______?

One of these planets has the greatest gravitational pull. Which one is it?

It is the law which explains why one can pull a piece without topping a glass in a quick motion.

Which of the following is NOT a source of energy?

Which instrument will one use to convert mechanical energy to electrical energy?

Sun’s energy is generated by?

Application of energy is called ______?

The falling of any form of water from the air to the earth’s surface.

The part of the atmosphere that filters the ultraviolet rays of the sun.

The point in the earth’s orbit nearest to the sun.

A property of minerals which gives off rays of light when exposed to ultraviolet light.

Which process involves chemical weathering?

How long does it take for the earth to complete one rotation?

What is the principal function of gravity in the universe?

What does the word “monsoon” mean?

Its’ discovery enable geologist to date rocks accurately.

It occurs when the earth is between the sun and the moon, with the earth’s shadow cast over the moon.

Male and female reproductive part of a flower.

In the human body, the cell that most nearly resembles a one-celled animals.

The main energy source of a plant-eating animals.

These are cellular secretions which help regulate the breakdown and buildup of various substance in the body.

It is the energy source of the cell which it uses for growing, reproducing and other activities.

It is a segment of DNA molecule which controls the appearance of a given trait.

Group of similar cells performing similar functions together.

The diffusion of water through a semi permeable membrane.

It shows the complex food relationship of organism in a given area and the cyclic flow of food through organisms.

Which of the following does NOT occur to both respiration and fermentation?

Energy removal is best illustrated in

Refers to the maximum amount of solute expressed in grams that can be dissolved in 100 grams of water at a specific temperature.

Compounds with the same molecular formula but with different structural formulas.

The most penetrating type of radiation given off by radioactive elements.

The basic unit for expressing the masses o individual atoms.

A substance that speeds up a chemical reaction without itself undergoing a chemical change.

The temperature at which the vapor pressure of the liquid is equal to the pressure of the surroundings atmosphere.

The warming of the earth’s surface due to an increase in atmospheric carbon dioxide phenomena.

Describe the force of gravity on an object.

When gaseous molecules are compressed, they tend to?

It is the union of two light nucleus to form a heavier nucleus, resulting in a mass defect and release of energy.

Which of the following statements is a characteristic of an electronic spectrum?

The term “RADAR” is derived from the phrase?

A material whose ability to conduct electricity lies between those of conductors and insulators

“LASER” is derived from the phrase?

What is the color of a transparent substance?

What is a rotating electromagnetic called?

What happens with the centripetal force when speed is doubled?

What is an electrochemical cell in which the reacting materials can be renewed by the use of reverse current?

What will make an object move in a circular path?