Earth and Space
Ecosystem
Electricity
Weather
Animal life
100

What's the force attracts all objects toward each other?

What is Gravity

100

What is an area that receives less than twenty-five cm of rain a year. 

What is A desert

100

What is the force that is between charged objects? 

what is Electric force

100

What's the process when water vapor becomes liquid water?

What is Condensation 

100

What's the place where two or more parts of a skeleton meet? 

What is a joint

200

What is the different shapes of the moon you see from earth? 

What is Phases 

200

What is the organism that obtains energy by feeding on other organisms? 

what is A consumer

200

What is the measure of how difficult it is for charges to flow through an object? 

what is Resistance

200

What's he process by which molecules of liquid water escape into the air after becoming water vapor?

What is Evaporation

200

What are the tissues that contract or relax to create movement? 

What is a Muscles 

300

What is happening when the moon passes directly between Earth and the sun?  

what is solar eclipse 

300

What is an organism that can make its own food?

what is A producer 

300

What is the continuous flow of electric charges through a material? 

what is Electric current

300

What's the movement of water through Earth's systems, powered by the suns energy? 

What is the water cycle

300

What's the process in which arthropods shed their exoskeletons periodically and produce new ones in the process? 

What is molting 

400

What is the number of day after the last new moon does the next new moon occur? 

what is 29.5 days

400

What is found where the fresh water of a river meets the salt water of an ocean?

what is An estuary 

400

What is the buildup of charges on an object? 

what is Static Electricity 

400

What's the tool that has two thermometers, a wet-bulb thermometer and a dry-bulb thermometer? 

What is a Psychrometer 

400

What is the signal that causes an animal to react in some way? 

What is A stimulus

500

What's imaginary line that passes through the Earth's center, and the North and South poles is what?

What is earths axis

500

What is the series of changes that occurs in an area where no soil or organisms exist? 

what is Primary Succession 

500

What is the law that states resistance in a circuit is equal to voltage divided by current. 

what is Ohm's Law

500

What's the temperature at which condensation begins? 

What is the dew point

500

What's the nerve cell with a unique structure for receiving and passing on information? 

What is a neuron