Of open or closed, an electrical circuit has to be this to work.
What is a closed circuit?
100
In science, this is what we call an educated guess, or what we think will happen in an experiment.
What is an hypothesis?
100
When you follow the scientific method to do an experiment, this is the number of variables you can change: A) one; B) five; C) as many as you can think of.
What is A) one? (the independent variable)
100
Clouds form because of this process, which happens when water vapor cools into liquid.
What is condensation?
200
This sound is made when heat from lightning suddenly makes the air expand.
What is thunder?
200
This is what we call a path that electrical current follows.
What is a circuit?
200
This is the word for the very calm center of a hurricane, where weather is actually pretty nice.
What is the eye?
200
Hurricanes form above warm, tropical water. That means they start near this imaginary line that circles the middle of the Earth.
What is the Equator?
200
This fluffy cloud often forms on a sunny day. Some people say it looks like a cotton ball in the sky.
What is a cumulus cloud?
300
This is a tool used to measure air pressure.
What is a barometer?
300
Electrical current is the movement of these tiny particles from atom to atom.
What are electrons?
300
This is the word for the leading edge of a mass of cold air.
What is a cold front?
300
One temperature scale is called Fahrenheit. This is the name of the other temperature scale.
What is Centigrade or Celsius? (accept either one!)
300
This giant tower of a cloud can be very dark on the bottom. When you see it, a thunderstorm or hailstorm is on the way.
What is a cumulonimbus cloud?
400
A thunderstorm is most likely to form when: A) a warm front moves into a warm air mass; B) a cold front moves into a cold air mass; C) a warm front moves into a cold air mass; D) a cold front moves into a warm air mass.
What is D) a cold front moves into a warm air mass?
400
This is the type of circuit you have when the current follows only one path, for instance, when a light, battery, and switch are all in the same circle.
What is a series circuit?
400
This is the word for the tool we use to measure the speed of the wind.
What is anemometer?
400
This is the gas that's created when vinegar mixes with baking soda.
What is carbon dioxide?
400
This feathery, wispy cloud forms high in the sky. You usually see it when weather is fair.
What is a cirrus cloud?
500
This is the layer of the atmosphere where weather happens.
What is the troposphere?
500
Batteries let us change this kind of energy to electrical energy.
What is chemical energy?
500
This is the type of circuit you have when the current can divide along different paths--for instance, when a light is in one loop and a buzzer is in another.
What is a parallel circuit?
500
This is a chemical we use to test whether a substance, like flour or cornstarch, has starch in it.
What is iodine?
500
To make a cloud in science class, you need to put: A) cold water in a hot place; B) hot water in a cold place; C) something cold in hot water; D) something hot in cold water