Master the 8th Grade STAAR Science Test Part 1/4

1. Which of the following three elements are most abundant in the plants and animals that make up the biosphere?

• Sulfur, oxygen, and hydrogen

• Nitrogen, silicon, and oxygen

• Phosphorous, oxygen, and iron

• Oxygen, carbon, and hydrogen

When plants and animals interact with the atmosphere, they are exchanging which elements abundant in both the atmosphere and living things?

• Nitrogen and oxygen

• Hydrogen and calcium

• Phosphorus and carbon

• Hydrogen and oxygen

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

When two substances are mixed, they might form a new substance. Which of the following would indicate that a new substance has been formed?

• The temperature of the mixture decreases

• The volume of the mixture increases

• The mass of the mixture increases

• One of the substances dissolves

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A student added white crystals to a clear liquid. The crystals dissolved in the liquid. After a few seconds, the liquid became quite warm and then turned bright red in color. The first indication that a chemical change was taking place could be observed when?

• The crystals were added to the liquid.

• The crystals dissolved in the liquid.

• The temperature of the liquid increased.

• The color of the mixture changed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

All of the following are evidence of a chemical change EXCEPT – (6.5D)

• Change in state of matter.

• Formation of a gas.

• Color change.

• Precipitate forms.

Tags

NGSS.MS-PS1-2

The table shows the properties of three classifications of elements. What are the best headings for columns A, B, and C?

• Metals, Nonmetals, Metalloids

• Nonmetals, Metalloids, Metals

• Metals, Metalloids, Nonmetals

• Nonmetals, Metals, Metalloids

Tags

NGSS.MS-PS1-2

All of these properties describe metals EXCEPT?

• Malleable

• Conductor

• Brittle

• Shiny

The table shows the physical properties of four elements. Which element is classified as a metalloid?

• Titanium

• Selenium

• Potassium

• Polonium

Tags

NGSS.MS-PS1-2

The provided table shows the properties of four different sample materials. A student has a substance with a density of 1.28 g/cm3. Which sample does the student have?

• Sample 1

• Sample 2

• Sample 3

• Sample 4

Tags

NGSS.MS-PS1-2

The table provided identifies a substance based on its density. A sample of an unknown substance has a mass of 89 grams and a volume of 10 cm3. Based on its density, it could be which of the following substances?

• Aluminum

• Brass

• Copper

• Gold

Tags

NGSS.MS-PS1-2