7th Grade End Of Units Test December 13th 2017

When looking at an object through a microscope, the image appears inverted. This means that if you push the slide to the right, the image of the "e" will appear to move to the left in the microscope.

Cells are the basic units of structure and function in living things. This means that all living organisms are made up of cells, and cells are responsible for carrying out the necessary functions for life. Cells are the building blocks of life and are involved in processes such as growth, reproduction, and metabolism. Without cells, living things would not be able to exist or function properly.

Predictions are based on past experience or evidence. When making a prediction, one uses their knowledge of previous events or information to forecast an outcome or make an educated guess about future events. This involves analyzing patterns, trends, and data from the past to make an informed prediction about what will happen in the future. By considering past experiences and evidence, predictions can be made with a certain level of confidence and accuracy.

Classifying refers to the process of grouping together things that share similarities or common characteristics. It involves categorizing items or concepts based on their shared traits or properties. This process helps in organizing and understanding information by identifying patterns or relationships among different elements. Classifying is not about creating models or predicting outcomes, but rather about organizing and categorizing based on similarities.

The given answer "Procedure" is correct because when testing, it is important to have a well-defined and systematic procedure in place. This involves following a set of steps or instructions to carry out the experiment or test. A clear procedure helps ensure consistency and accuracy in the testing process, allowing for reliable results to be obtained. It also helps to eliminate any potential bias or errors that may occur if the testing is not done in a standardized manner.

The numbered part #1 in the microscope is the Ocular/Eyepiece.

not-available-via-ai

Organelle #7 is described as a thin layer of protein and fat that surrounds the inside of the cell, inside the cell wall. This matches the description of the cell plasma membrane, which is a selectively permeable barrier that controls the movement of substances in and out of the cell. It allows some substances to pass into the cell while blocking others.

Organelle #10 is the Golgi Bodies. The Golgi Bodies are flattened, folded, pancake-like structures located near the nucleus but not attached to it. They are responsible for packaging proteins and carbohydrates into membrane-bound bubbles for use and "export" in and from the cell.

The correct answer is the nucleolus. The description provided matches the characteristics of the nucleolus, which is a structure found within the nucleus of a cell. It appears as a dark purple sphere within a larger sphere and is responsible for the production of ribosomes and their RNA.

The numbered part of the microscope being referred to in this question is #11, which is the Stage Clips. Stage clips are used to hold the slide in place on the stage of the microscope, ensuring that it does not move during observation or examination.

The power of magnification is determined by multiplying the power of the ocular lens by the power of the objective lens. In this case, the ocular lens has a power of 40X and the objective lens has a power of 10X. Multiplying these two powers together gives us a magnification of 400X.

When you push the slide away from you, the letter 'e' in the microscope appears to move toward you. This is because the slide is being moved in the opposite direction of your observation point. As a result, objects on the slide, including the letter 'e', will appear to move in the opposite direction as well.

An observation refers to the process of gathering information through one's senses. It involves using our sight, hearing, touch, taste, and smell to collect data about the world around us. This method allows us to directly perceive and gather information about objects, events, or phenomena, providing us with firsthand knowledge. It is a fundamental and essential aspect of scientific inquiry and research.

Skepticism is the attitude of doubt, which means questioning and not accepting information or beliefs without evidence or proof. It involves critically examining claims and being cautious before accepting them as true. Skeptics value evidence and rational thinking, and they are not easily swayed by emotions or personal biases. They seek to understand and evaluate arguments and claims objectively, promoting the use of critical thinking and skepticism as a tool for acquiring knowledge and understanding the world.

An experiment is a systematic process used to test a hypothesis or validate a theory. It involves manipulating variables and observing the outcomes to determine cause and effect relationships. By conducting an experiment, one can gather empirical evidence to support or refute a theory. This process allows for controlled conditions and the ability to replicate the experiment to ensure reliable results. Therefore, the correct answer for this question is "Experiment."

The conclusion is the outcome or result of the hypothesis being tested. It is based on the analysis of the data collected during the experiment. The conclusion either supports or rejects the hypothesis, providing evidence for or against the theory. It summarizes the findings and allows researchers to draw inferences and make judgments about the hypothesis. Therefore, the conclusion is a crucial component in understanding the relationship between the hypothesis and the test results.

The numbered part of the microscope that is identified as #3 is the nosepiece.

not-available-via-ai

The correct answer is Vacuole. The description provided matches the characteristics of a vacuole. Vacuoles are large membrane-bound spaces within plant cells that occupy a significant portion of the cell. They help maintain the shape of the cell and store water and waste materials.

The given answer is correct because it accurately states the three main principles of the cell theory. According to the cell theory, all living things are composed of cells, which are the basic units of structure and function in living organisms. Additionally, the theory states that all cells arise from pre-existing cells through cell division. This answer aligns with these principles and accurately summarizes the cell theory.

Chlorophyll is the correct answer because it is the green pigment found in the chloroplasts of plants. It is essential for photosynthesis, the process by which plants convert sunlight into energy. Chlorophyll absorbs light energy and uses it to synthesize carbohydrates, providing energy for the plant. It is responsible for the green color of leaves and is crucial for plant growth and development.

The correct answer is "Cell Wall". The description given in the question matches the characteristics of the cell wall. It is described as a thick, rigid membrane that surrounds and frames the plant cell. The cell wall is responsible for providing structural support to the plant cell and also helps in bonding with other cell walls to form the structure of the plant.

The description of organelle #11 as a yellow ball with spikes radiating from it and a dense center with radiating tubes like a sun (star shape) matches the structure of a centrosome. Centrosomes are responsible for cell division and play a crucial role in separating genetic material into new plant cells.

not-available-via-ai

not-available-via-ai

not-available-via-ai

Jane Goodall learned about the chimpanzees' use of tools through her observations. She spent countless hours with the chimpanzees, closely watching their behavior and taking notes. Through her careful observations, she was able to gather data and evidence that supported the understanding that chimpanzees use stems or long blades of grass as tools to "fish" out food from termite mounds. This qualitative research method of observing and documenting behavior is a crucial aspect of scientific research.

not-available-via-ai

In testing, measurements refer to the collection of data. Data is a set of values or observations that are obtained during the testing process. These values can be numerical or qualitative and are used to analyze and evaluate the performance, functionality, and quality of the system or software being tested. Therefore, the correct answer is "Data."

Organelle #14 is represented as a tiny, black dot inside of the purple sphere. This structure is made up of DNA (the chromosomes) that contains the cells' genetic material. Chromatin is the correct answer because it fits this description.

Organelle #9 is described as a bean-like, oval structure with a double membrane that has an inner membrane folded many times. This organelle is known as the mitochondria, which is responsible for producing energy in the form of ATP through cellular respiration. The breakdown of sugars and storage of energy in ATP mentioned in the explanation further supports the identification of organelle #9 as mitochondria.

Organelle #8 is described as a small, oval, grey structure that helps control chemical change in the cells. It also converts fatty acids to sugars and assists in photosynthesis. Based on these characteristics, the correct answer is Peroxisomes.

The correct answer is Theodor Schwann. He concluded that all animals are made up of cells.

Matthias Schleiden concluded that all plants are made of cells. This conclusion is based on his extensive research and observations of plant tissues. Schleiden's work laid the foundation for the cell theory, which states that all living organisms are composed of cells. He specifically focused on plant cells and was able to identify their key characteristics and functions. Through his research, Schleiden demonstrated that cells are the fundamental building blocks of plants and that they are responsible for their growth and development. His findings revolutionized the field of biology and our understanding of the structure and function of plants.

To determine whether a stainless steel water bottle is better at keeping cool water cool longer than a plastic water bottle, the most relevant data to collect would be changes in the water temperature over time. By measuring the temperature of the water in both bottles at regular intervals, we can compare how quickly each bottle allows the water to warm up. This data will provide evidence to support or refute the friend's claim about the insulating properties of stainless steel. The other options, such as melting points, weather changes, and moisture in the room, are not directly related to the cooling performance of the bottles.

In this slide, the two parts of the onion skin cell that are easily visible are the cell wall and the nucleus. The cell wall is the outermost layer of the cell and provides support and protection. The nucleus is the control center of the cell and contains the DNA. Both of these structures can be clearly seen in the cross section of the onion skin cells.

A law is a statement that describes nature, meaning it is a general principle or rule that explains how things in the natural world behave or interact. Laws are based on observations and experiments and are used to predict and understand the behavior of various phenomena. They provide a framework for understanding the fundamental principles and processes that govern the world around us.

Plasmodesmata are small tube-like organelles that are like channels in the cell wall, crossing between plant cells. These tubes allow for transport and communication between plant cells, allowing molecules, nutrients, and signals to move between cells.

The numeral for kilo is 1,000. Kilo is a prefix that represents a factor of 1,000 in the metric system. So, when we see the term "kilo" in a numerical context, it means multiplying the number by 1,000. In this case, the correct answer is 1,000 because it represents the numeral for kilo.

Organelle #4 is chloroplasts. Chloroplasts are green, bean-shaped organelles that contain chlorophyll. They are responsible for conducting photosynthesis, which is the process of converting sunlight into chemical energy (food) for the plant.

Ribosomes are small, black, grainy structures that are synthesized in the nucleolus. There are two types of ribosomes: free ribosomes that float in the cytoplasm, and bound ribosomes that are attached to the rough endoplasmic reticulum. Therefore, ribosomes fit the description given in the question and are the correct answer.

not-available-via-ai

Organelle #16 is described as a folded, snaking-ribbon-like organelle that is a continuation of the nuclear membrane and is covered with tiny grains of protein. This organelle is responsible for producing proteins and transporting materials throughout the cell. The organelle that fits this description is the Rough Endoplasmic Reticulum, as it has a folded structure, is connected to the nuclear membrane, and is covered in ribosomes, which are the tiny grains of protein.

A dependent variable is a factor that may change in response to the test factor or the independent variable. In an experiment, the independent variable is manipulated or controlled by the researcher, and the dependent variable is the outcome or result that is measured or observed. The dependent variable is dependent on the independent variable, meaning that it is influenced or affected by the independent variable. Therefore, the correct answer is dependent variable.

Lenses in microscopes magnify an object by bending the light that passes through them. When light passes through a lens, it is refracted, or bent, causing the light rays to converge or diverge. This bending of light allows the lens to focus the image and magnify it. By manipulating the curvature of the lens, the microscope can adjust the amount of magnification. Therefore, the correct answer is that lenses in microscopes magnify an object by bending the light that passes through them.

The correct answer for Organelle #17 is Cytoplasm because it is the jelly-like material outside the cell nucleus where the organelles are located.

The correct answer is "All of the above" because the given statements are all valid inferences that can be made when examining the cheek cell slides. The absence of a cell wall in cheek cells can be inferred from the statement "The cheek cells do not have a cell wall." The identification of the nucleus in cheek cells as a dark spot in each cell can be inferred from the statement "The nucleus of the cheek cells can be identified because they look like a dark spot in each cell." Lastly, the statement "The nucleus of cheek cells tend to be in the center of the cell" implies that the nucleus is typically located in the center of the cell.

The given description states that organelle #15 is modeled as the outer covering of the purple sphere, separating it from other organelles and protecting it. The organelle that fits this description is the nuclear membrane. The nuclear membrane surrounds the nucleus, separating it from the cytoplasm and other organelles. It acts as a protective barrier for the nucleus and regulates the movement of molecules in and out of the nucleus.

Models are important to use because they help us understand complex objects or processes by representing them in a simplified manner. They also aid in the learning process by allowing us to build and manipulate them, which enhances our understanding. Additionally, models are a useful tool for sharing information and teaching others about objects and processes. Therefore, all of these reasons make models important to use.