Question

which of the following is a quantitative observation? select all that apply 1) a penny weighed 1.2 grams 2) a copper piece turned green upon exposure to air 3) an olympic medalist clocked 46.91 seconds for a 100 meter freestyle swimming 4) my backpack of books is very heavy 5) mount everest is the tallest mountain

Explanation:

Quantitative observations involve numbers and measurements. 1) has a weight measurement (1.2 grams) and 3) has a time - measurement (46.91 seconds). 2) is a qualitative color - change observation. 4) is a qualitative description of heaviness. 5) is a qualitative superlative statement without a numerical measurement value.

Answer:

1. A penny weighed 1.2 grams, 3) An Olympic medalist clocked 46.91 seconds for a 100 - meter freestyle swimming