Explain why solar eclipses do not occur every time the moon revolves around earth

Can two atoms with the same mass number be isotopes? And with the same atomic number?

Which best describes what is made of matter? all living things and objects all atoms all solid objects and atoms all living things

Which of the following planets has seasonal changes that are comparable to Earth and Mars? Neptune Uranus Jupiter Saturn

What measures air pressure.?

Which question can be answered by science? A. How much pesticide is safe to use on plants? B. How should you feel about using plastic bags? C. Should scientists be allowed to do genetic research? D. Why do paper bags look better than plastic bags?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What two factors determine how fast weathering occurs

A sound that's produced by a single wave at a constant frequency and with no overtones is called

Which of the following is ignored when determining the relative mass of atoms? protons nucleus electrons. neutrons