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REVIEW FOR FINAL
Everything we have studied in the 7th grade science course (Mrs. Jansen-Stanco)
| Question | Answer |
|---|---|
| What is the scientific method? | The scientific method are 6 steps that are used to solve or understand a problem with observation, making a hypothesis, and testing the hypothesis. |
| What are the steps of the scientific steps in order? | 1. Stating a problem or question clearly 2.Research your problem 3. Form a hypothesis 4. Design and perform experiments 5. Recording and analyzing data 6. Stating a conclusion |
| What is a hypothesis? | A hypothesis is an educated guess which could be a possible solution to a problem |
| What is the metric system? | The metric system is a system of measurement that uses the meter, liter, and gram as base units of length, capacity, and weight. |
| Acronym for the metric system | Kangaroos, Hop, Down, Mountains, Drinking, Chocolate, Milk Kilo-, Hecto-, Deka-, Basic Unit, Deci-, Centi-, Mili-. |
| What is the basic unit for length? | Meter |
| What is the basic unit of capacity (volume)? | Liter |
| What is the basic unit of weight? | Gram |
| What is mass? | The amount of matter in an object |
| If an object sinks in water, it is more dense or less dense than water? | The object has more density than water, therefore the object will sink. |
| What is density? | Density is the mass per unit volume and is the compactness of an object. |
| What is the density formula? | Mass(g) D = ————- Volume (mL or cm3) |
| Can density change if an object is cut in half? | NOOOO! Density never changes. |
| What is chemistry? | The study of the composition, structure, properties, and changes of matter. |
| What is an atom? | A basic unit of matter that is indivisible. |
| What are the 3 main parts of an atom? | Protons, Neutrons, Electrons |
| What is an element? | A pure chemical substance consisting of a single type of atom |
| What is a compound? | A pure substance that has 2 or more different elements chemically combined. |
| What is the purpose of the Periodic Table of Elements? | It is used to predict the properties of an element. It is an arrangement of the chemical elements organized based on their atomic number(number of protons in the nucleus). |
| What are the 4 main groups in the Periodic Table of Elements? | Noble Gases, Non-metals, Metals, and Metalloids |
| What is the difference of a compound and mixture? | A compound are two or more things chemically combined while a mixture are two or more things that are mixed an are not chemically combined |
| What are the parts of a solution? | Solute - substance dissolved Solvent - substance that does the dissolving |
| What is energy? | The ability to do work; it is happening around us. Main source of energy is the sun. |
| What is meteorology? | The study of Earth’s atmosphere |
| Layers of the atmosphere in order. | Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere |
| Climate | The characteristic of weather conditions in an area for a long period of time |
| Seasons | Short periods of climate change caused by differences in daylight, temperature, and weather patterns |
| What is less predictable, weather or climate? | Weather |
| What is a front? | It is a boundary between where 2 air masses meet |
| What are the 4 main fronts? | Stationary Front, Cold Front, Warm Front, Occluded Front |
| What is humidity? | Amount of water vapor in the atmosphere |
| What is the water cycle? | It is driven by the energy of the Sun and the amount of water in the air. Affects humidity, precipitation, air pressure, and visibility. |
| What is astronomy? | |
| What are asteroids? | Large groups of rocks found in asteroid belt |
| What are comets? | A ball of ice rock dust and frozen gases which orbits the Sun |
| What are meteoroids? | A piece of rock in space. When it enters Earth’s atmosphere it becomes a meteor. As it is burning through the atmosphere, it becomes a meteorite f it hits Earth. |
| What is the Big Bang Theory? | It is a theory of how the universe was created by a giant blast of energy which occurred 14 billion years ago. |
| What is an organism? | Any living thing |
| 6 characteristics of Living Things | 1. Cellular Organization 2. Contain Similar Chemicals 3. Uses Energy 4. Grow and Develop 5. Respond to Their Surroundings 6. Reproduce |
| What are the 8 life processes found in all living organisms? | Nutrition, Excretion, Transport, Synthesis, Growth, Respiration, Regulation, Reproduction |
| Nutrition | Process in which organisms take in materials from the environment to be used by the body. 2 types of nutrition, 1. Heterotrophic: Organism cannot make own food so it ingests nutrition. 2: Autotrophic: Organism makes its own food to be used by the body. |
| Excretion | Removal of metabolic wastes |
| Transport | Movement of materials through the body and within a cell |
| Synthesis | Uses smaller more simple materials in order to make larger more complex products |
| Growth | Increase in cell number and mitosis |
| Respiration | Production of ATP. The two types of respiration are aerobic respiration (requires oxygen to break down glucose to make big energy) and anaerobic respiration (No oxygen required to produce energy) |
| Regulation | Controls and coordination of all life processes. Responds to changes in the environment (homeostasis) |
| Reproduction | Production of new individual organisms. The 2 types of reproducían are asexual reproduction (requires 1 parent) and sexual reproduction (requires 2 parents) |
| Metabolism | Sum total of all life processes in the body; every living organism Carrie’s out metabolic activities |
| Organelles | Structures in the cell that does ‘jobs’ for the cell (check organelles review study stack) |
| Diffusion/Passive Transport | The process of molecules moving from an area of high concentration to an area of low concentration without the use of energy. |
| Active Transport | The process of moving molecules from an area of low concentration to an area of high concentration with the use of energy. |
Created by:
Nibin
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