7th Grade Biology

Explanation
The given materials used in the experiment are actual rockets, alkaseltzer, 2 liter pop bottles, and matches. However, the question asks for "some" materials used, implying that there may be more materials involved in the experiment that are not listed. Therefore, the answer provided is incomplete and may not be the only correct answer.

Explanation
The first step in an experimental design is to formulate a question. This question sets the foundation for the entire experiment and guides the researcher in determining what they want to investigate. It helps in identifying the problem or topic of interest and provides a clear direction for the research. Without a well-defined question, it would be difficult to design an experiment and establish the necessary procedures to find answers or solutions. Therefore, formulating a question is essential to initiate the experimental design process.

Explanation
The purpose of this reaction is to both produce oxygen and allow plants to make their own food. Plants undergo photosynthesis, a process in which they use sunlight, water, and carbon dioxide to produce oxygen and glucose. Oxygen is released into the atmosphere, aiding in global warming, while glucose serves as the plant's source of energy for growth and development. Therefore, the correct answer is both b and c.

Explanation
A plant cell has both a cell wall and chloroplasts, which are not present in an animal cell. The cell wall provides structural support and protection for the plant cell, while chloroplasts are responsible for photosynthesis, converting sunlight into energy. These features are unique to plant cells and are not found in animal cells.

Explanation
Chloroplasts are responsible for capturing energy from the sun in plant cells. They contain a pigment called chlorophyll, which absorbs sunlight and converts it into chemical energy through the process of photosynthesis. This energy is then used by the plant to carry out various metabolic processes and to produce glucose, which serves as a source of energy for the cell. Mitochondria are responsible for cellular respiration, not capturing energy from the sun. The cell membrane is involved in regulating the movement of substances in and out of the cell, while the nucleus contains genetic material and is involved in controlling cell functions.