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Midterm Review
Question | Answer |
---|---|
Energy from the Sun reaches the Earth through what form of heat transfer? | radiation |
When does an object have the greatest amount of kinetic energy? | when it is moving the fastest |
When placed in direct sunlight, what types of objects will absorb the most visible light? | dull/dark colored objects |
When placed in direct sunlight, what types of objects will reflect the most visible light? | shiny/light colored objects |
What is the Law of Conservation of Energy? | energy cannot be created, it only changes form |
When a television set changes electrical energy to sound and light energy, some energy is... | changed to/given off as heat |
What two factors determine the amount of gravitational attraction between two objects? | mass and distance |
If an object is pulled in two directions, it will move in which direction? | in the direction of the larger force |
What type of heat transfer occurs in a liquid or gas? | convection |
What type of heat transfer causes warm particles to speed up, rise up, loose their energy as they cool down, and sink, to be reheated in a cycle again? | convection |
Why is moving river water considered a renewable resource? | the water cycle keeps renewing the water over time |
Which phase change occurs between a solid and a liquid? | melting |
What phase change occurs between a liquid and a gas? | evaporation |
What phase change occurs as a gas converts into a liquid? | condensation |
What phase change occurs as a liquid converts into a solid? | freezing |
What phase change occurs as a solid converts directly into a gas? | sublimation |
In what phase changes is energy absorbed? | melting and evaporating |
In what phase changes is energy released? | condensation and freezing |
What are two things that can effect how fast a sugar cube dissolves? | the temperature of the water and the size of the sugar cube particles |
A graduated cylinder measures what? | volume |
A triple beam balance measures what? | mass |
A meter stick measures what? | length |
What does Newton's third law state? | for every action there is an equal and opposite reaction |
What does Newton's first law state? | an object in motion will stay in motion/at rest unless acted on by an unbalanced force |
What is the formula for Newton's second law? | F=MA |
What is one reason windmills are a better source of energy than fossil fuels? | renewable/less pollution |
What is one reason people feel windmills are not a great source of energy? | loud/interferes with radio signals |