A push or a pull. When a pair of these is unbalanced a change in motion will occur.
What is a force?
100
100 degrees Celsius. Water that reaches this temperature changes from a liquid to a gas throughout. Other substances, however, make this change at their own characteristic temperature.
What is the boiling point of water?
100
This object reflects the light that strikes it, is a solid, and can be found in bathrooms, telescopes and makeup bags.
What is a mirror?
100
This means to move around another object in a closed path, or orbit. Because Earth does this around the sun we have years and seasons, and we see different constellations in different seasons.
What is revolve?
100
The community, or all of the living things, plus all of the nonliving things they interact with.
What is an ecosystem?
200
The average weather conditions of an area, measured over many years. Some examples of these are polar, temperate, desert and tropical.
What is climate?
200
This property can be used to separate a mixture of sand and sugar. The tool that would do the job is water.
What is solubility?
200
A toaster transforms electricity to this to cook your food.
What is thermal energy?
200
The day/night cycle is caused by this movement of Earth. One of these for Earth lasts 24 hours.
What is rotation?
200
This shows the transfer of energy through an ecosystem, starting with producers that change solar energy into the chemical energy of food through the process of photosynthesis.
What is a food chain?
300
A special mixture in which the matter experiences a change in its physical properties. These special mixtures are more difficult to separate.
What is a solution?
300
A nice warm car and your crayons are not a good combination since this phase change is likely to happen, along with a scolding from Mom.
What is melting?
300
When this strikes the retina of your eye a message is sent to your brain and you see an image.
What is light energy?
300
These are the processes that change layers of sediment into sedimentary rock.
What are compaction and cementation?
300
This gas is exhaled by animals, given off by the burning of fossil fuels and volcanoes, and traps heat in Earth's atmosphere. Planting trees and other green plants actually reduces the amount of this in the atmosphere.
What is carbon dioxide?
400
The dropping of sediment in a new location. The result can be speleothems, deltas, and changing sand dunes, to name just a few.
What is deposition?
400
Matter in this state will fill up its container and also take its shape. Examples are helium, air and carbon dioxide.
What is gas?
400
This type of circuit is complete, allowing electric current to flow.
What is a closed circuit?
400
The moon phase which would be seen 7 days after a full moon.
What is third quarter?
400
A behavior or trait that helps an organism survive in its environment. Examples are migration of geese, hibernation of polar bears, the shape of a birds beak and the type of feet an animal has.
What is an adaptation?
500
A clean and renewable energy source, such as wind, water, crops and the sun.
What is an alternative energy source?
500
Matter that allows electrical or thermal energy to pass through easily is said to be a good one of these.
What is a conductor?
500
When this happens to light that changes speed when traveling from one material to another, the image we see can appear larger or smaller than the actual object.
What is refraction?
500
Arches, tables and sand dunes are all landforms caused by this agent of erosion. It erodes most frequently in dry areas lacking plant life to stabilize the soil and water to make sediments stick.
What is wind?
500
This life cycle includes a total change in form as the young insect transforms to the adult insect. The egg stage would be most similar to the seed stage of a plant's life cycle.