Science Department Mock Test

1. Chlorine (Cl2) reacts with Hydrogen (H2) to produce a compound which includes one atom of each element (HCl). Which other element Most likely bonds with Hydrogen in the same ratio?

A. Potassium (K)

B. Sulfur (S)

C. Bromine (Br)

D. Neon (Ne)

2. In the chemical equation below, Calcium (Ca) reacts with water (H20) to form Calcium Hydroxide [Ca(0H)2].

2 Ca(s) + 2 H2O (l) 2 Ca(OH)2 (aq)

Which of these Best describe Calcium?

A. elementB. compoundC. moleculeD. ion

3. The contact process is a method of manufacturing sulfuric acid. Part of this process includes the reaction shown:

V2O5

2 SO2 (g) + O2 (g) 2 SO3 (g) + heat

Which of these will Most likely increase the rate of the reaction?

A. decreasing the pressure of Oxygen (O2)B. removing the catalyst Vanadium Pentoxide (V2O5)C. increasing the sulfur dioxide (SO2) concentrationD. increasing the temperature

Figure 36-1

____ 4. The algae at the beginning of the food chain in Figure 36-1 area. consumers.b. decomposers.c. producers.d. heterotrophs.

____ 5. Organisms that obtain nutrients by breaking down wastes and dead organisms are calleda. decomposers.b. omnivores.c. herbivores.d. producers.

____ 6. All the interconnected feeding relationships in an ecosystem make up a fooda. interaction.b. chain.c. network.d. web.

7. Which of the following macromolecules functions in energy storage, insulation and hormone production?

A.Proteins B. DNA C. Lipids D. carbohydrates

8. The structural similarities between the flippers of whales and the arms of humans are used to show that the

a. human species began life in the oceans b. human species and whales have a common ancestry c. whales are older than the human species d. whales evolved from the human species

9. The diagram below illustrates the change that occurred in the frequency of phenotypes in an insect population over 10 generations. A probable explanation for this change would be that over time there was 

e. a decrease in the adaptive value of gene a f. an increase in the adaptive value of gene a g. an increase in the population of this insect h. a decrease in the mutation rate of gene A

10. The concept that new varieties of organisms are still evolving is best supported by the

i. increasing need for new antibiotics j. increasing number of individuals in the human population k. decreasing number of new fossils discovered in undisturbed rock layers l. decreasing activity of photosynthetic organisms due to warming of the

atmosphere

11. What is the most likely effect of killing 80% of a colony of bacteria with a certain antibiotic?

m. The remaining bacteria will re-grow into a new colony more resistant to the antibiotic

n. The remaining bacteria will die because of the drastic decimationo. The bacteria will not cause any further infections because their numbers have

been drastically reducedp. The bacteria will try to leave the body to avoid the antibiotic

12. Plate boundaries can form various geological features such as mountain ranges, volcanoes, trenches, oceanic ridges, and rift valleys. Rift valleys are cracks on the earth’s surface created in the same was as oceanic ridges. Which of the following best explains the formation of Rift valleys?

a. Convergent boundary where plates move towards each otherb. Convergent boundary during a subduction zone.c. Divergent boundary where plates move apart.d. Transform boundary where plates move past each other.

13. Mountains can affect the climate of nearby lands. In some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. The western slopes of the Olympic Mountains in Washington State are some of the rainiest places in the world. What is this side of the Olympic Mountains called?

e. West sidef. Leeward sideg. Windward sideh. East side

14. When substances are mixed in a chemical cold pack, an endothermicreaction occurs. Which statement describes the potential chemical energy of the reactants and products?

a. Product energies are greater than reactant energies.b. Reactant energies are greater than product energies.c. The energies of reactants are the same as those of productsd. Catalysts increase the energies of reactants over those of products.

15. A light year is a way of measuring distance. The nearest star to the Earth is the Sun and it is approximately 8 light minutes away. Which statement best explains this information?

i. The sun is only 8 minutes away from the Earthj. Sunlight travels through space 8 minutes faster than light from other stars.k. It takes light from the Sun 8 minutes to reach the Earth.l. Sunlight reaches the Earth with a speed of 8 lightyears.

16. A community in which barn owls and snakes consume only mice is being observed. If the number of snakes increases, which of the following is most likely to happen first?A The barn owl population will increase.B The mouse population will decrease.C The barn owl population will decrease.D The mouse population will remain the same.

17. A cross between homozygous purple-flowered and homozygous white-flowered pea plants results inoffspring with purple flowers. This demonstratesa. the blending model of genetics.b. true-breeding.c. dominance.d. a dihybrid cross.e. the mistakes made by Mendel.

18. The vehicle that brought you to school this morning uses gasoline as fuel. What type of energy transformation takes place in order for the car to move?

A. chemical to kineticB. thermal to chemicalC. thermal to mechanicalD. mechanical to thermal

Use the diagram and description below to answer the following question.

19.In a particular plant, leaf color is controlled by gene D. Plants with the dominant allele D have dark greenleaves, and plants with the homozygous recessive dd genotype have light green leaves. A true-breedingdark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-pollinate. Thepredicted outcome of this cross is diagrammed in the Punnett square shown below, where 1, 2, 3, and 4represent the genotypes corresponding to each box within the square.

D d

1 2

3 4

____ 20. Which of the boxes marked 1-4 correspond to plants with dark leaves?a. 1 onlyb. 1 and 2c. 2 and 3d. 4 onlye. 1, 2, and 3

____ 21. Which of the boxes correspond to plants with a heterozygous genotype?a. 1b. 1 and 2c. 1, 2, and 3d. 2 and 3e. 2, 3, and 4

____ 22. Which of the plants will be true-breeding?a. 1 and 4b. 2 and 3c. 1-4d. 1 onlye. none

D

d

____ 23. P = purple, pp = white. The offspring of a cross between two heterozygous purple-flowering plants (Pp Pp)results ina. all purple-flowered plants.b. purple-flowered plants and white-flowered plants.c. two types of white-flowered plants: PP and Pp.d. all white-flowered plants.e. all pink-flowered plants.

24. _________ energy from the Sun travels a vast distance through space to Earth, warming the planet and providing energy that enables green plants to grow.

A. ChemicalB. KineticC. RadiantD. Thermal

25. Light waves travel more slowly in water than in air. This causes light waves to change direction when they move from water to air or air to water. When light waves travel from air to water, they slow down and bend toward the normal. This is an example of________

A. ReflectionB. RefractionC. DiffractionD. Diffusion

26. A student decides to test the acidity of different sodas. He determines that the red brand has more acidity than any of the other sodas. What is the BEST method to validate those results?

a. Place a drop of a weak acid into each soda and retest the experiment.

b. Remove the pH meter and use a different meter.

c. Retest the experiment several times.

d. Use different brands of sodas.

27. Two elements are combined in a 2:1 ratio. These two elements are Beryllium (Be) and Chlorine (Cl). Which of the following elements would also be combined with chlorine in a 2:1 ratio?

a. Magnesium (Mg)

b. Sodium (Na)

c. Potassium (K)

d. Nitrogen (N)

28. When aluminum (Al) and Oxygen (O) are combined, aluminum oxide (Al2O3) is produced. In this reaction, Oxygen is best described as which of the following?

a. compound

b. element

c. molecule

d. air

29. When comparing different types of chemicals a student determines that carbon directly affects the boiling point of these chemicals. In particular, he noted that an increase in the number of carbons increases the temperature at which the chemical boils. What can be inferred as the boiling points increase?

a. There are less carbon atoms in the chemical.

b. There are more carbon atoms in the chemical.

c. The number of carbon atoms remains the same.

d. There is no relationship with the number of carbon atoms.

30.

From the scenario above, the turbine shaft is connected to the generator shaft, which in turn rotates freely between two magnets to produce electric currents. Not all the mechanical energy carried by the generator shaft produces electric energy. Where does the remaining energy go?

a. Converts to chemical energy

b. Changes to potential energy

c. Changes to radiant energy

d. Converts to heat to energy

31.

Two weeks ago, WSVN Channel 7 announced on the news that there was a new version of motorized semi-luxury boat. The boat’s outer shell was constructed from photovoltaic cells (When Photovoltaic cells are connected they make a solar panel). Why is the boat industry changing the type of energy the boat uses to propel through the water?

a. It is less expensive than the fossil-fuel driven boat.

b. It is more reliable then the fossil-fuel driven boat when the sun is down.

c. The solar boat does not produce CO2 to pollute the water and the environment.

d. Solar boats are safer and more spacious than fossil-fuel driven boats.

32.

The experiments shown to the left uses iron fillings to show that a current-carrying conductor produces a magnetic field. The picture on the right shows a wire surrounded by compasses. When there is no current running through the wire, all the compasses point in the same direction (north). However when the wire carries a current, all the needles in the compasses deflect toward the magnetic field that the wire produces.

Joshua and his family planned a camping trip. For this camping trip they bought a compass and placed it in their car. While they were driving towards their destination they pass by an electric station which produces a steady current, causing an immediate change on one of the objects in the car. Which of the following objects is most likely to have this change based on the information above?

A) The deflection speedometer’s needle B) The compass’ needleC) The fuel gauge’s needle D) None of the above

33. Three different planets, i.e., A, B, and C are located in the same solar system. The mass of planet A is equal to 1000 KG. The mass of planet B is equal to 2000 KG. The mass of planet C is equal to 3000 KG. According Newton’s law, the weight of an object is equal to mass time the gravitational acceleration of the planet. Based on the information above which planet has the greatest gravitational force?

(A) Planet A(B) Planet B(C) Planet C

(D) All equal

37. The illustration below shows the relationship in a normal family.

What conclusion can be drawn from the location of each family member?

(A) The parents are part of the newest generation.(B) The grandparents are part of the newest generation.(C) The kids are part of the newest generation.(D) None of the above.