FCAT 2.0 SCIENCE Grade 8 Sample Test

Ethan is observing chemical and physical properties of a substance. He heats a substance and observes that the substance turns from a brown solid to a black powder. He refers to several chemistry journals that claim this represents a chemical reaction. From his observation and research, he concludes that the substance goes through a chemical change when heated. How can Ethan best defend his conclusion?

• by demonstrating that the substance will eventually melt if the temperature continues to increase
• by verifying that the substance is now made up of different molecules than before it was heated
• by verifying that the substance is made up of only one type of element
• by demonstrating that the substance is less dense after it is heated

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Mr. Roberts drives his car away from his house at a constant speed. Which of the following graphs best shows the relationship between the distance traveled and the time spent driving?

• F

• H

• G

• I

Ice forms in the cracks of a basalt rock formation and breaks some rock into smaller pieces. The diagram below shows part of the rock cycle.

At which point in the cycle shown above would the process of breaking down rocks occur?

• J

• K

• L

• M

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

An object moves through space with balanced forces acting on it. Which statement best describes the speed and direction of the object as long as the forces acting on it remain balanced?

• The speed and direction of the object will both change.

• The speed and direction of the object will remain constant.

• The speed will change, but the direction will remain constant

• The speed will remain constant, but the direction will change.

Tags

NGSS.MS-PS2-2

A scientist performs an experiment and asks other scientists around the world to replicate it. Why would other scientists most likely try to perform the same experiment?

• To find out if weather of various regions of the world would affect the results

• to see if the experiment would be less expensive in another part of the world

• to confirm the results of the experiment conducted by the scientist

• to verify that the hypothesis of the experiment is a scientific law

Tags

NGSS.HS-PS1-2

Food webs show feeding relationships among different types of organisms. Those organisms each have a specific niche. Which of the following best describes a function of decomposers in food webs?

• to recycle nutrients into soil

• to convert solar energy into fooD

• to provide food for secondary consumers

• to compete with secondary consumers for oxygen

Tags

NGSS.MS-LS2-3

The interaction between the cryosphere and hydrosphere can have an impact on Earth’s oceans. Which of the following is an example of an interaction between the cryosphere and hydrosphere?

• evaporation of water from oceans at the equator

• release of fresh water into ocean water as icebergs melt

• decomposition of organic matter at the bottom of oceans

• release of large amounts of salt from icebergs into the ocean

Tags

NGSS.MS-ESS2-4

Scientific knowledge may change as new evidence or information is discovered. Which of the following would NOT be a result of new scientific research and information?

• Binomial nomenclature is assigned to a recently identified plant species

• An endangered monkey species is put in a reserve for protection from extinction.

• A newly discovered chemical element will be added to the periodic table of the elements.

• A nonnative plant species will begin to reproduce rapidly after being introduced into a swamp ecosystem.

Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr) are in the same column in the periodic table. Why are these elements in the same column in the periodic table?

• They are the same size

• They react with each other

• They have similar properties

• They have the same number of protons

Students in Ms. Alvarez’s eighth grade science class are investigating how temperature, in degrees Celsius ( ̊C), affects the solubility of a compound in 100 milliliters (mL) of water. Ms. Alvarez provides the students with a graph that shows the solubility of a certain compound, as shown below.

She then tells the students that she will demonstrate how many grams (g) of the compound will dissolve in 100 mL of water at 40 ̊C. Based on the information in the graph, which of the following is the best prediction of how many grams of the compound will dissolve at 40 ̊C?

• 40 g

• 65 g

• 85 g

• 100 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4