NYSTCE 245 – ARTS AND SCIENCE
PRACTICE EXAM
Question 1: A third-grade teacher wants to guide students through a simple
scienti�c investigation about plant growth. Which of the following initial steps best demonstrates an understanding of scienti�c inquiry?
Choices:
1) Providing students with a variety of seeds, soil, and pots and telling them to grow plants.2) Instructing students to observe plants in the classroom and write down what they see.3) Leading a discussion to help students formulate a testable question about factors a�ecting plant growth.4) Showing students a video about photosynthesis and then asking them to draw a plant.
Correct Answer: Option C
Explanation: Scienti�c inquiry begins with formulating a testable question or hypothesis. Option C directly addresses this by guiding students to develop a question, which is a crucial �rst step in designing an experiment. Options A, B, and D are observational or instructional activities but do not initiate a structured investigation based on a student-generated question.Question 2: During a science experiment, a group of �fth-grade students is collecting data on the solubility of di�erent substances in water. They record the
amount of substance that dissolves in a �xed volume of water at a constant temperature. What is the *independent variable* in this experiment?
Choices:
1) The amount of substance that dissolves.2) The type of substance being tested.3) The volume of water used.4) The temperature of the water.
Correct Answer: Option B
Explanation: The independent variable is the factor that is intentionally changed or manipulated by the experimenter. In this scenario, the students are changing the "type of substance being tested" to observe its e�ect on solubility. The amount dissolved is the dependent variable, while the volume of water and temperature are controlled variables.Question 3: A middle school science teacher is designing an activity to help students understand the importance of replication in scienti�c experiments. Which of the following activities would be most e�ective for this purpose?
Choices:
1) Having each student group conduct a unique experiment on a di�erent topic.2) Asking students to repeat their own experiment multiple times and compare their results.3) Providing students with data from a historical experiment and asking them to analyze it.4) Instructing students to research and report on famous scienti�c discoveries.
Correct Answer: Option B
Explanation: Replication involves repeating an experiment, either by the same researchers or di�erent researchers, to ensure the reliability and validity of the results. Having students repeat their own experiment multiple times (Option B) directly demonstrates the concept of replication and allows them to see if their �ndings are consistent, thereby reinforcing the importance of reliable data.
Question 4: A high school biology class is conducting an experiment to determine the e�ect of di�erent light intensities on the rate of photosynthesis in Elodea plants. They measure the number of oxygen bubbles produced per minute under varying light conditions. Which of the following represents a valid hypothesis for this experiment?
Choices:
1) Elodea plants need light to grow.2) If light intensity increases, then the rate of photosynthesis will increase.3) What is the relationship between light and photosynthesis?4) Photosynthesis occurs in Elodea plants.
Correct Answer: Option B
Explanation: A valid hypothesis is a testable statement that proposes a relationship between variables. It typically follows an "If... then..." format. Option B clearly states a predicted relationship between light intensity (independent variable) and the rate of photosynthesis (dependent variable) that can be tested through experimentation. Options A and D are statements of fact or general observations, and Option C is a question, not a hypothesis.Question 5: Which of the following best describes the principle of uniformitarianism in Earth Science?
Choices:
1) Geological processes occurring today are di�erent from those that occurred in the past.2) The Earth's surface is constantly changing due to sudden, catastrophic events.3) Geological processes observed today have operated in a similar manner and intensity throughout Earth's history.4) The rate of geological change has accelerated signi�cantly over geological time.