Comprehension Check 6.1, P. 284

What is the difference between mass and weight?

Mass is the amount of matter that makes up an object. Weight is a measure of the pull of gravity on an object.

Which would weight more, a brick made of iron or the same size brick made of lead?

a brick of lead

Which is more dense, oak wood or aluminum?

aluminum

the study of what substances are made of, and how one substance can be changed into another

chemistry

the amount of matter (mass) in one unit of volume

density

the units in which mass is measured

grams or kilograms

When the head of an axe fell into the water, the prophet Elisha caused it to float. Why was this miraculous?

it took a miracle to make the axe head float because the axe head was more dense than the water.

anything that takes up space and has mass

matter

Would it be a miracle if a wooden handle floated in the water?

no; wood ordinarily floats because it is less dense than water.