How do we know that some layers of the earth are solid and some liquid

According to the naeyc, curriculum is defined as

Which of the following has a positve charge? a) protons b) neutrons c) particles

Question 5 of 101 pointwhich of these describes how the introduction of the printing press affectedsociety? oa. more people could read about important civic events.oob. people had the ability to print and share their ideas.ooc. people could keep printed records of agricultural goods.ood. more people could influence the media of that time.submit