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Questions and Answers
Which of the following is an example of a chemical change?
Which of the following is an example of a chemical change?
Which of the following is NOT a form of energy?
Which of the following is NOT a form of energy?
What is the function of the nucleus in a cell?
What is the function of the nucleus in a cell?
Which of the following is an example of a physical change?
Which of the following is an example of a physical change?
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Which of the following is NOT a property of matter?
Which of the following is NOT a property of matter?
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What is the function of chlorophyll in plants?
What is the function of chlorophyll in plants?
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Study Notes
Chemical and Physical Changes
- A chemical change results in the formation of new substances, often seen in reactions like combustion or rusting.
- A physical change alters the form or appearance of a substance without changing its chemical identity; examples include melting ice or dissolving sugar in water.
Forms of Energy
- Energy exists in multiple forms, such as kinetic, potential, thermal, chemical, and electrical.
- An example of something that is NOT energy could be matter, which consists of physical substances.
Cell Functions
- The nucleus is the control center of a cell, housing the cell's DNA and regulating gene expression, growth, and reproduction.
- It plays a critical role in cell division and the overall management of cellular activities.
Properties of Matter
- Matter is characterized by properties such as mass, volume, and density.
- A characteristic that is NOT a property of matter may include aspects like temperature or color changes, which are not intrinsic properties.
Role of Chlorophyll
- Chlorophyll is a pigment essential for photosynthesis in plants, allowing them to absorb light energy.
- It primarily captures light from the sun, converting it into chemical energy in the form of glucose, which fuels plant growth and metabolism.
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Description
Test your knowledge of general science with this quiz for 7th grade students. Identify examples of chemical changes and forms of energy, and understand the function of the nucleus in a cell.
