What causes lightning?

a) thunder

b) an electric discharge

c) rising warm air

d) air masses meeting

An increasing number of cirrus clouds indicate which type of weather is likely to happen

How much power is used if a force of 54 newtons is used to pull a wagon a distance of 10 meters in 6 seconds? 3,240 W 90 W 32.4 W 1.11 W

A mineral is observed to become soft and crumbly and develop a reddish color as it undergoes weathering, what process has most likely taken place?

What are some of thr similarties of physical changes and chemical changes?

Which of Newton's Laws of motion requires you to have brakes on your bicycle?

How many moles of oxygen are needed to make 6.50 moles of magnesium oxide?

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.

What material was added to powdered rock during tuttle and bowen's experiments?

Which of the following statements is true? Selected Answer: D. At least two of the above statements (A-C) are true. Answers: A. Ions are formed by adding or removing protons or electrons. B. Scientists believe that solids are mostly open space. C.

Does anybody know which element from the periodic table that has 19 electrons and 24 neutrons, for atomic charge.