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Science #1
Science #2
Science #3
Science #4
Science #5
100
Which of these best describes the composition of the inner core of Earth? (F) liquid iron and nickel (G) carbon dioxide and ice (H) quartz and oxygen (J) solid iron and nickel
What is (J) solid iron and nickel
100
Which set of tools is best to observe the different stages of plant cell division? (F) test tube and distilled water (G) petri dish and metric ruler (H) hot plate and Erlenmeyer flask (J) light microscope and slides
What is (J) light microscope and slides?
100
Where are the genes for the physical traits of an organism located? (A) on a strand of RNA (B) on a chromosome (C) inside a hormone (D) inside a carbohydrate
What is (B) on a chromosome?
100
The thinnest layer of Earth ranges in thickness between 7 kilometers and 70 kilometers. Which layer is being described? (F)crust (G) mantle (H) outer core (J) inner core
What is (F) Crust?
100
New rock forms from rock that is melted and then cools.What type of rock is most likely formed by this process? (A)sedimentary (B)igneous (C) metamorphic (D) magma
What is (B)igneous?
200
BONUS: (8X) The main function of which system is to help protect inner organs from being damaged by an outside force? (F) excretory (G) nervous (H) skeletal (J) circulatory
What is (H) skeletal?
200
Which of these must happen for the sea floor to spread apart? (F) a flood (G) a hurricane (H) plate movement (J) volcanic eruption
What is (H) plate movement?
200
Which organelle captures and absorbs light energy in a plant cell? (A) chloroplast (B) chlorophyll (C) mitochondrion (D) ribosomes
What is (A) chloroplast?
200
An object is resting motionless on a surface. According to Newton’s first law, the object will only start to move if (F) the net forces on the object equal zero. (G) an unbalanced force is applied to the object. (H) the upward force of the object is equal to its acceleration. (J) two forces that are equal and opposite are applied to the object.
What is (G) an unbalanced force is applied to the object.?
200
What part of a flower produces female reproductive cells? (A) anther (B) ovary (C) sepal (D) filament
What is (B) ovary?
300
Which systems work most closely together to carry oxygen to cells and to remove carbon dioxide waste? (A)digestive and excretory (B) skeletal and muscular (C) circulatory and respiratory (D) nervous and reproductive
What is (C) circulatory and respiratory?
300
Which substance is a product of photosynthesis and is used as a reactant in respiration? (F) water H O2 ( ) (G) carbon dioxide CO2 ( ) (H) oxygen O2 ( ) (J) hydrogen H2 ( )
What is (H) oxygen O2?
300
(BONUS: 5X)Which chemical compounds are the reactants of photosynthesis and products of cellular respiration? (F) water (H2O) and glucose (C6H12O6) (G) oxygen (O2) and carbon dioxide (CO2) (H) glucose (C6H12O6) and oxygen (O2) (J) carbon dioxide (CO2) and water (H2O)
What is (J) carbon dioxide (CO2) and water (H2O)?
300
Human use of chemicals containing chlorofluorocarbons (CFCs) has contributed to a thinning of the ozone layer in the atmosphere. The ozone layer absorbs ultraviolet radiation from the sun. Which best describes a negative consequence of the thinning of the ozone layer? (F) too many nutrients are available in oceans (G) animal cells have become damaged (H) less light is available for plant growth (J) less precipitation happens in rain forests
What is (G) animal cells have become damaged?
300
BONUS: (8X) Which structure of a flower is correctly matched with its function? (A) The petal protects young buds. (B) The stamen produces female gametes. (C) The pistil guides pollen to the ovary. (D) The anther holds the ovule.
What is (C) The pistil guides pollen to the ovary.?
400
Engineers designed a new construction material. When a strong enough force is applied to this material, the material turns red. This change in color is intended to warn people that the material has reached a breaking point. Which situation would best show that the new material provides a benefit? (A) In a laboratory test, the material fails to change color. (B) At a construction site, the color change allows workers to move to a safe area. (C) When used in a building, the material changes colors in different levels of light. (D) When used in a bridge, the material remains for a long time without changing color.
What is (B) At a construction site, the color change allows workers to move to a safe area.?
400
BONUS: (5X) Some researchers are developing a new fertilizer designed to improve the growth of plants in hot, dry climates. The fertilizer was applied to one hundred desert plants in a greenhouse. The average daytime temperature in the greenhouse was 90°F, and the humidity levels were low. Which is best for the researchers to do next? (A)compare plants that received fertilizer to similar plants that received none (B) begin selling the fertilizer to gardeners living in hot, dry climates (C) change the conditions in the greenhouse and retest the fertilizer (D) test the fertilizer on plants that are adapted to cooler climates
What is (A)compare plants that received fertilizer to similar plants that received none?
400
As the wheels of a train push down on a track, the track pushes back against the wheels. Which of Newton’s laws is used to explain these forces? (A) An object at rest tends to stay at rest unless acted upon by an unbalanced force. (B) The net force of an object is equal to its mass times its acceleration. (C) For every action, there is an equal and opposite reaction. (D) Any two objects exert a gravitational force of attraction on each other.
What is (C) For every action, there is an equal and opposite reaction.?
400
BONUS: (5X) Which of these equations best shows the reactants and products of cellular respiration? (A) carbon dioxide + water→sugar + oxygen (B) water + oxygen →sugar + carbon dioxide (C) sugar + oxygen→carbon dioxide + water (D) sugar + carbon dioxide→ oxygen + water
What is (C) sugar + oxygen→carbon dioxide + water?
400
Which example could only be classified as an outcome of sexual reproduction? (F) when all of the offspring are genetically identical (G) when two of the offspring are produced from one parent (H) when one parent combines its genetic information with another parent to produce offspring (J) when the cells in the offspring have the same number of chromosomes as cells in the parent
What is (H) when one parent combines its genetic information with another parent to produce offspring?
500
In guinea pigs, black fur (B) is dominant to white fur (b). A Punnett square of a cross between a black-furred and a white-furred guinea pig is Bb x bb. What can be determined from this Punnett square? (A) There is a 100% chance that these guinea pigs will have live offspring. (B) There is a 100% chance that these guinea pigs will have four offspring. (C) There is a 50% chance that the offspring will have gray fur. (D) There is a 50% chance that the offspring will have black fur.
What is (D) There is a 50% chance that the offspring will have black fur.?
500
Which statement accurately describes the process that forms a type of rock? (F) Metamorphic rock forms when igneous rocks are compacted at low temperatures. (G) Sedimentary rock forms when metamorphic rock melts. (H) Sedimentary rock forms when small pieces of rock are compacted and cemented. (J) Metamorphic rock forms when magma cools and crystallizes.
What is (H) Sedimentary rock forms when small pieces of rock are compacted and cemented.?
500
BONUS: (5X) The characteristic for having dimples (D) is dominant to the characteristic for not having dimples (d). Draw a Punnett square showing a cross between a dimpled person and a non-dimpled person. (Dd x dd) What percentage of the offspring from this cross will most likely have dimples? (A) 25% (B) 50% (C) 75% (D) 100%
What is (B) 50%?
500
Students placed a raw egg without its shell into a highly concentrated solution of sugar. If the amount of sugar in the solution is greater than in the egg, which of these is most likely to occur? (F) Water will fl ow into the egg and cause the egg to expand. (G) Water will fl ow out of the egg and cause the egg to shrink. (H) The sugar will dissolve the egg. (J) The sugar will break the egg into pieces.
What is (G) Water will fl ow out of the egg and cause the egg to shrink.?
500
Some scientists want to design a system of instruments that will evaluate ocean currents, temperatures, and winds in order to predict weather patterns. What should they do before they produce the first complete working version of the system? (A) build a prototype of the system (B) evaluate the results of the system (C) improve the design of the system (D) conduct tests on the system
What is (A) build a prototype of the system?