Physical Science Unit 1 Exam

Is burning wood a chemical or physical change?

• chemical

• physical

Is glass breaking a chemical or phyiscal change?

• chemical

• physical

A possible explanation to a problem that has not yet been tested.

• data

• theory

• hypothesis

• fact

This variable in an experiment is the one being deliberately changed by the scientist.

• dependent variable

• independent variable

• data

• control group

Should experiments be repeated over and over to see if the results are the same each time?

• yes

• no

All matter is made of _________.

• energy 

• atoms 

• electrons 

• compounds 

What is at the center of every atom?

• An electron

• A compound

• A molecule

• A nucleus

The positively charged particles of an atom are the ________.

• electrons

• protons

• neutrons

• protons & neutrons

What does the nucleus of an atom contain?

• Electrons and neutrons

• Protons and neutrons

• Neutrinos and positrons

• DNA and RN

__________ are negatively charged particles that are in the orbitals around the nucleus.

• protons

• nucleus

• neutrons

• electrons