Animals
Weather and Climate
Forces and Motion
Biomes and Ecosystems
Landforms
100
Term that describes when an entire species of plants or animals dies out completely.
What is extinction?
100
An instrument that measures air pressure
What is barometer?
100
A force that pulls objects to the center of the Earth
What is gravity?
100
An animal that eats both plants and animals
What is an omnivore?
100
A stream or river that flows into a larger body of water, other than the ocean
What is tributary?
200
An animal that is hunted by a different animal as a food source.
What is prey?
200
Large puffy gray clouds that usually produce precipitation.
What are cumulonimbus clouds?
200
A force described as when two objects rub against each other causing a change in speed
What is friction?
200
Any organism above the first level of the energy pyramid?
What is a consumer?
200
The wearing away of the soil by ice, water, and wind
What is erosion?
300
An animal that hunts another animal for food
What is a predator?
300
The process through which Earth's water rotates through evaporation, precipitation, and condensation.
What is the water cycle?
300
Term for when an object in motion will stay in motion unless an outside force is exerted upon it
What is momentum?
300
plants grow, insects eat the grass, snakess eat the insects, hawks eat the snakes
What is a food chain?
300
A dry climate that gets less than 10 cm of rain each year
What is a desert?
400
polar bears, pandas, and black rhinos are examples of these
What are endangered species?
400
Part of the water cycle in which water is changed from liquid to gas
What is evaporation?
400
Examples include lever, screw, pulley, and wedge
What are simple machines?
400
Organisms that make their own energy using sunlight
What are producers?
400
Formed when soil particles settle to the bottom of a river and collect at the river mouth
What is a delta?
500
Term that describes when two animals try to get the same food in the food web.
What is competition?
500
Caused by the collision of warm and cold air masses
What is a storm?
500
Resistance of an object to a change in its state of motion
What is inertia?
500
Plants and animals interconnected in many ways to help them survive
What is a food web?
500
Primary means of protecting land against erosion
What are plants?
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