CS2: Quarter 1 Pretest and Review

Which of the following describes a limitation of the drawing but NOT a clay model?

• It cannot represent a living cell since the cytoplasm should be in constant motion.

• It does not contain the correct number of nuclei.

• It does not represent the main parts of a cell.

• It cannot represent a living cell since a true cell is 3-dimensional.

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Sandy is conducting an experiment to see if the grades of dancers are better than the grades of baseball players. She organizes the

dancers into group A and the baseball players into group B. She records the grades and makes the conclusion that the dancers have

overall better grades.

Is Sandy correct in her statement that this is an experiment?

• Sandy is correct this is an experiment because she obtained the grades and compared the groups.

• Sandy is incorrect because she did not test anything, so this is an observation.

• Sandy is incorrect because she did not collect the data accurately and this is an observation.

• Sandy is correct because she organized the students into two groups.

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According to the Rate of Carrot Growth with Growfast Fertilizer graph below, what is the BEST amount of fertilizer to use to grow

carrots the fastest?

• 12 grams

• 9 grams

• 8 grams

• 5 grams

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Juan wants to know the answer to the question, “Does soil type affect how tall bean plants grow?” Which investigation would best help Juan answer this question?

• Juan decides to observe bean plants in the wild and measure their growth daily. Juan records the measurements in his

  science notebook.

• Juan creates a model of a bean plant and observes its growth in different soil types daily for a month. Juan shares his

  findings with Ms. McDonald.

• Juan goes to Ms. McDonald’s farm to observe the growth of the farm's beans. He also measures the growth of the bean

  plants in soil for a month.

• Juan designs an experiment in which he plants bean plant seeds in two different soil types and also plants them in his

  yard as a control. He then measures the growth of each bean plant daily.

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When discussing the theory of atoms, a model is the only option. Why is this true?

• An atom is too small to be observed in detail with current technology.

• Atoms are too expensive to collect for scientific use.

• An atom is too dangerous to handle in a lab setting.

• An atomic model is easier to manipulate than a real atom.

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What is NOT a benefit of using a scientific model?

• It can be used to visualize a complex idea or concept.

• It can lose some accuracy in order to make it simple enough to use.

• It can represent something too small or large to manipulate.

• It can be safer, quicker, and less expensive for the scientist to work with.

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Through freezing and thawing, a boulder is broken into smaller pieces. What is this an example of?

• physical weathering

• chemical weathering

• abrasion

• deposition

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Scientists notice that a river delta has been gradually getting larger and shallower over the past 50 years. What is the MOST LIKELY

reason for this change?

• The river current increases and there is no change in the silt level.

• The river current slows and there is no change in the silt level.

• Silt is deposited as the river slows down.

• Silt is deposited as the river speeds up.

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Which of the following statements is TRUE about dunes and deltas?

• A dune forms when an animal pushes sand into small hills and a delta forms when sediment is deposited at the mouth of

  a river.

• A dune forms when sand is blown by the wind and gets trapped by beach grass and a delta forms when sediment is deposited at the mouth of a river.

• A dune forms when sand is blown by the wind and gets trapped by beach grass and a delta forms when sediment is carried away from the mouth of a river.

• A dune forms when sand is washed up on shore from the ocean and forms hills and a delta forms when sediment is

  carried away by a glacier.

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Which one of the following is NOT an example of a chemical change?

• gas burning on a stove

• rust forming on an iron fence

• sugar dissolving in a glass of water

• using electricity to break down water into hydrogen and oxygen

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