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7th Grade Science
1st Semester questions in 7th grade science to study for MId-terms
Question | Answer |
---|---|
Name 2 methods scientist use to obtain empirical evidence | In the field and in the lab |
What basic requirements must a hypothesis have? | -Testable by experiment or observations -Independant and Dependant Varibles |
List the steps to the scientific method | -Defining a problem -Research -Hypothesis and Prediction -Planning investigation -Identifying Variables -Collecting/Organizing Data -Interpreting Data/Analyzing Information -Drawing/Defending Conclusions |
How many steps are in the scientific method? | 6 Basic Steps |
What is the Independent variable? | What the scientist changes in the experiment |
What is the dependant variable? | The reactions to the scientist change in a experiment |
What is a wave? | A disturbance that transfers energy from one place to another |
What is a longitudinal wave? | A wave when particles move back and forth in the same direction as the wave or parallel to the wave |
What is a transverse wave? | a wave where particles move perpendicularly to the direction the wave travels |
What wave requires a medium in which to travel? | A mechanical wave |
What are the different forms of energy?(MRS.CHEN) | Mechanical, Radiant, Sound, Chemical, Heat, Electric, Nuclear |
What does the law of conservation of energy state? | Energy cannot be created or destroyed |
What is conduction? | Transfer of energy from one substance to another through direct contact |
What is convection? | Transfer of energy through a liquid or gas |
What is radiation? | Transfer of energy through electromagnetic waves? |
List the levels of organization from largest to smallest | Ecosystem, Community, Population, Individual |
What is a community? | A group of many species |
What is a population? | A group of one species |
What is an organism's habitat? | Its shelter or where it lives |
What is an organism's niche? | Its role in a ecosystem |
How are organisms connected to their nonliving environment? | Organisms use abiotic elements in their ecosystem for water, habitat, and nutrients |
What do all food chains start with? | Producers |
Herbivores, carnivores, and omnivores are all types of what? | Consumers |
What is the decomposers role in a environment? | The breaking down of dead organisms |