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7th science exam
this is a great way to get ready for a 7th grade science exam
| Question | Answer |
|---|---|
| What is scientific method? | A form of a series of procedures |
| What are the parts of a scientific method? | State the problem, gather information, form a hypothesis, perform an experiment, analyze data, draw conclusions. |
| 5 traits of a living thing. | organized, respond, energy, reproduce, grow develop. |
| Cytoplasm | a gelatin like substance that constantly flows inside the cell membrane. important chemical reactions occur here. |
| Cell membrane | An outer covering all cells have, it is made of one or more layers of linked molecules. |
| Cell wall | tough rigid outer coverings that protect the cell and give it shape. |
| Nucleus | Directs all cell activities and is separated from the cytoplasm by a membrane |
| Ribosome | small structures scattered around the cell, make their own proteins. |
| Rough endoplasmic recticulum | Extends from the nucleus to the cell membrane (has ribosomes on it). materials can be processed and moved around inside the cell. |
| Smooth endoplasmic reticulum | Extends from the nucleus to the cell membrane. materials can be processed and moved around inside the cell. |
| Mitochondria | The energy in food is stored until it is released by the... |
| Chloroplast | Food is made in green organelles in the cytoplasm called... |
| Golgi body | Stacked, flattened membranes, sorts proteins and other cellular substances and package them into membrane bound structures called vesicles. |
| Vacuole, Vesicle | A space within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid. |
| Lysosome | Contain digestive chemicals that help break down food molecules, cell wastes, and worn out cell parts. |
| Cytoskeleton | A framework through out the cytoplasm, which helps maintain or change its shape, they enable some cells to move. |
| Tissue | a group of similar cells that work together to one job. |
| Organ | a structure made up of two or more different types of tissues that work together. |
| Cell | The smallest unit of an organism that carries on the functions of life. |
| What are the cell theory steps? | All organisms are made up of one or more cells, The cell is the basic unit of organization in organisms, all cells come from cells. |
| Who concluded that plants are made of cells in the 1830s? | Matthias Schleiden |
| Who concluded that all animals are made of cells? | Theodor Schwann |
| Who hypothesized that cells divide to form new cells? | Rudolf Virchow |
| If the eyepiece of a microscope is 10x and the lense is 4x, what is the total? | 40x |
| If the eyepiece of a microscope is 10x and the lense is 40x, what is the total? | 400x |
| Virus | A strand of hereditary material surrounded by a protein coating. |
| Is a virus living? | No |
| Why is a virus living or why is it not living? | Viruses are not living because they lack a cell membrane, nucleus, and organelles. |
| How can a virus be treated? | Vaccinating people, improving sanitary conditions, quarantining patients, and controlling animals that spread disease. |
| Matter | Anything that takes up space and is made of atoms (even air). |
| Energy | anything that brings about change. |
| What are atoms made of? | Protons, neutrons, and electrons. |
| Protons | Positive charge |
| Neutron | No charge |
| Electron | Negative charge |
| Is a virus a non living thing? | Yes |
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