Science STAAR Test

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

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

Use the chart below to answer the following question. A student is given the chart above and is told to identify an unknown mineral. The student observes that the mineral has a glassy luster and a hardness less than 3. What is the identity of the mineral?

• Actmite

• Cobaltite

• Jadeite

• Talc

The chart provided gives some information about four energy sources. Which energy resource would be best for a city that has a limited amount of open space and wants to use an efficient source of energy?

• Solar energy

• Wind energy

• Natural gas

• Biomass

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

If a community is choosing between solar and wind energy, which advantage would make wind energy the better option?

• A backup system is necessary when there are cloudy days or no wind to power the turbines.

• Wind energy is the less inexpensive energy source and it be limitless.

• Locations for turbines are limited because obstructions block the wind.

• The electricity generated by wind often varies due to fluctuations in wind speed.

An image of a toy rocket and forces are shown below. Assuming the only two forces on the toy rocket are lift and gravity, which of the following combinations would result in the rocket moving upward?

• Lift = 5 Newtons and Gravity = 5 Newtons

• Lift = 5 Newtons and Gravity = 4 Newtons

• Lift = 3 Newtons and Gravity = 4 Newtons

• Lift = 4 Newtons and Gravity = 4 Newtons

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The diagram shows an investigation in a science classroom. Students pulled the same mass up an inclined plane propped up on five blocks, then six, seven, and eight blocks. Each time, they use a spring scale to measure the forces needed to pull the mass up the inclined plane. This investigation can show how which of the following affects the force needed to move an object up an inclined plane?

• The mass of the object

• The length of the inclined plane

• The height of the inclined plane

• The surface area of the object

Tags

NGSS.MS-PS2-2

The diagram shows a 50 N load being lifted with a movable pulley. To raise the load one meter, how much upward force must be exerted on the rope?

• 10 N

• 25 N

• 15 N

• 50 N

Tags

NGSS.MS-PS2-2