Which of the following is NOT true about 3-D printing? * 3-D printing always works without errors.
Personal 3-D printers can use plastic filament to build an object.
3-D printers can be used to make different objects.
A 3-D printer moves around to create layers.

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

If a star is moving toward earth, it is