How can objects as small as dust grains become the building blocks of planets?

Of the 168 hours in a week as a full time student you should spend how many hours per week on school work?

Remote sensing of the earth's surface and atmosphere may involve the use of what type of instruments?

Which of these terms are associated with communication between neurons? chemical signals, electrical signals, synapse chemical signals, synapse, neurotransmitters synapse, electrical signals, chemical signals synapse, electrical signals, neurotransmitters