Physical Science Mid-term Exam 2022

Which of the following is an example of a chemical change?

• melting of ice.

• tearing paper.

• grilling a hamburger.

• strumming a guitar.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If a mixture is evenly mixed it is said to be

• chemically bonded.

• a compound.

• homogeneous.

• heterogeneous.

What type of matter consists of two or more substances that are chemically combined?

• atoms

• mixtures

• elements

• compounds

Matter is defined as anything that

• can be weighed.

• has mass and takes up space.

• can be seen and touched.

• contains kinetic or potential energy.

Tags

NGSS.MS-PS1-5

Compounds and elements are

• pure substances.

• dense.

• always solid.

• mixtures.

An atom is

• the smallest unit of matter that maintains its chemical identity.

• always made of carbon.

• smaller than an electron.

• the smallest unit of a compound.

Tags

NGSS.MS-PS1-1

Which is an example of physical change?

• Bread being toasted.

• Steak being cooked on a BBQ grill.

• Ice melting.

• Salt dissolving in a pot of water.

Frank has a paper clip. It has a mass of 9.0 g and a volume of 3.0 cm³. What is its density?

• 3.0 g/cm³

• 0.33 g/cm³

• 27 g/cm³

• 39 g/cm³

Fruit loops, pizza, and skittles are examples of _________ mixtures.

• heterogeneous

• homogeneous

• pure substance

• compound

Coffee, mouthwash, and vinegar are examples of __________ mixtures.

• heterogeneous

• homogeneous

• pure substance

• compound