Question

review
choose the best answers.
1.1)______is anything that takes up space and has mass.
a. matter b. an atom c. a physical property
1.2)______which statement is true about the air inside a balloon?
a. it is made up of visible particles.
b. it is made up of very large particles.
c. it is not made up of particles at all.
d. it is made up of particles that are too small to be seen.
1.3)______are anything that you can observe or measure directly.
a. pieces of matter b. atoms c. physical properties

Explanation:

1.1) Matter is defined as anything that takes up space and has mass. An atom is a basic unit of matter, and a physical property describes a characteristic of matter.
1.2) Air is a gas made up of particles (such as nitrogen and oxygen molecules) that are too small to be seen. They are not visible, not very large, and are made up of particles.
1.3) Physical properties are characteristics that can be observed or measured directly. Pieces of matter are physical substances, and atoms are basic units, but the description fits physical properties.

Answer:

1.1) A. Matter
1.2) D. It is made up of particles that are too small to be seen.
1.3) C. Physical properties