Which statements about fossils are true?
they give clues about earth's climate in the ancient past.
only animals can become fossils.
fossils show what earth was like millions of years ago
fossils can be found in ice.
the best fossils are preserved in tar

What’s a special glass that most beakers are made of

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.