1) for century scientist found evidence that supports the theory of spontaneous generations. Which of the following supported this theory?
a)maggots appearing on rotting meat
b) The swan next flask experiment.
c) The sun rising in the east and seeing in the west.
d) all living things are made of cells.
2 what piece of empirical is qualitative data?
a) The soup taste salty
b) The water temperature is 80°F
c) The tree is 8 feet tall.
d) The bicycle speed is 12 mph
3) how did new evidence found by Amory Thorpe and brews Huizen add onto continental drift and create the theory of plate tectonics?
a) they showed what the oceans floor looked like help explain how continents move over time.
b) they showed fossils of the same organisms on the multiple continents helped explain how continents float on the mantle.
c)They propose that mountain ranges at the edge of continents helped explain how continents used to fit together.
d) they propose that continents are pieces of the earths crust floating on top of the mantle.
4) which word best describes the statement that mass is neither maid nor destroyed by chemical reactions or physical changes?
a) theory
b) hypothesis
c) experiment
d) law
5) which part of newtons second law of motion explains why it is easier to push an empty cart than a full one?
a) A greater force is needed to move an object with a greater mass.
b) an object with greater mass requires less force to move.
c) A greater force will cause a greater increase in acceleration.
d) an object with greater mass will react with a greater force.
1) To determine which of the given options supported the theory of spontaneous generation, we need to understand what the theory is. Spontaneous generation is the idea that living organisms can arise from non-living matter. Scientists in the past believed that certain observations supported this theory.
a) Maggots appearing on rotting meat: This observation was thought to support the idea of spontaneous generation because it seemed like the maggots were spontaneously generated from the decaying meat.
b) The Swan-neck flask experiment: This experiment, conducted by Louis Pasteur, actually disproved the theory of spontaneous generation. Pasteur showed that microorganisms do not spontaneously generate in a sterilized flask when exposed to the air.
c) The sun rising in the east and setting in the west: This observation is unrelated to the theory of spontaneous generation.
d) All living things are made of cells: This understanding, contributed by scientists such as Robert Hooke and Anton van Leeuwenhoek, contradicted the theory of spontaneous generation. It showed that all living things are composed of cells, which come from preexisting cells, rather than spontaneously generated.
Based on the explanations, option b) (The swan-neck flask experiment) contradicts the theory of spontaneous generation, while option d) (All living things are made of cells) supports it. Therefore, the correct answer is d) All living things are made of cells.
2) To determine which piece of empirical data is qualitative, we need to understand the difference between qualitative and quantitative data.
a) The statement "The soup tastes salty" is a qualitative observation because it describes a subjective sensory experience.
b) The statement "The water temperature is 80°F" is a quantitative observation because it provides a specific measurement based on a numerical value.
c) The statement "The tree is 8 feet tall" is also a quantitative observation because it provides a specific measurement based on a numerical value.
d) The statement "The bicycle speed is 12 mph" is also a quantitative observation because it provides a specific measurement based on a numerical value.
Based on the explanations, the answer is a) The soup tastes salty, as it represents a qualitative observation.
3) To understand how Amory Thorpe and Brews Huizen's new evidence added onto continental drift and created the theory of plate tectonics, we need to consider their contributions.
a) They showed what the ocean floor looked like and helped explain how continents move over time: This contribution, in the form of mapping the ocean floor and discovering features like mid-ocean ridges and deep-sea trenches, supported the theory of plate tectonics. It provided evidence for the movement of continents and the existence of tectonic plates.
b) They showed fossils of the same organisms on multiple continents and helped explain how continents float on the mantle: This contribution is not accurate and does not align with the current understanding of plate tectonics.
c) They proposed that mountain ranges at the edge of continents helped explain how continents used to fit together: This contribution, known as the theory of continental drift, preceded the theory of plate tectonics. It suggested that continents were once joined and have drifted apart over time, leading to the formation of mountain ranges along their edges.
d) They proposed that continents are pieces of the Earth's crust floating on top of the mantle: This proposal aligns with the theory of plate tectonics, which states that the Earth's lithosphere is broken into several large and small tectonic plates that float and move on the semi-fluid asthenosphere of the mantle.
Based on the explanations, the correct answer is a) They showed what the ocean floor looked like and helped explain how continents move over time.
4) To determine the word that best describes the statement that mass is neither made nor destroyed by chemical reactions or physical changes, we need to consider the concept being described and the scientific terminology used.
a) Theory: In scientific terms, a theory is a well-substantiated explanation of some aspect of the natural world that is based on a body of evidence and has withstood repeated testing and scrutiny. It is not the appropriate word to describe the statement regarding mass conservation.
b) Hypothesis: A hypothesis is a proposed explanation for a phenomenon or prediction of an outcome. It is a tentative statement that can be tested further through experimentation or observation.
c) Experiment: An experiment is a procedure carried out to support or refute a hypothesis. It involves manipulating variables and collecting data to test a hypothesis or theory.
d) Law: In scientific terms, a law is a descriptive generalization about how some aspect of the natural world behaves under specific circumstances. It is a concise statement that describes a fundamental principle of nature.
Based on the explanations, the correct answer is d) Law. The statement that mass is neither made nor destroyed by chemical reactions or physical changes refers to the law of conservation of mass.
5) To determine which part of Newton's second law of motion explains why it is easier to push an empty cart than a full one, we need to understand the components of the law.
Newton's second law of motion states that the force acting on an object is equal to the product of its mass and acceleration (F = m × a).
a) A greater force is needed to move an object with greater mass: This statement is a correct interpretation of Newton's second law. According to the law, a larger mass will require a greater force to achieve the same acceleration.
b) An object with greater mass requires less force to move: This statement is incorrect and contradicts Newton's second law. A greater mass requires more force, not less, to achieve the same acceleration.
c) A greater force will cause a greater increase in acceleration: While this statement is true, it does not directly relate to the question about pushing an empty cart versus a full one.
d) An object with greater mass will react with a greater force: This statement is true, but it does not directly relate to the question about pushing an empty cart versus a full one.
Based on the explanations, the correct answer is a) A greater force is needed to move an object with greater mass.